Avena Sterilis

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Barros José - One of the best experts on this subject based on the ideXlab platform.

  • Eficácia do herbicida Hussar Plus no controlo da Avena Sterilis (balanco-maior) em pós-emergência da cevada dística (Hordeum distichum L.)
    IFE-Edições e Formação S.A, 2015
    Co-Authors: Barros José
    Abstract:

    No ano agrícola de 2013/2014, realizaram-se dois ensaios de campo com o objetivo de estudar a eficácia do herbicida Hussar Plus no controlo da Avena Sterilis L. (balanco-maior) em pós-emergência da cultura da cevada dística (Hordeum distichum L.). Estes ensaios foram levados a cabo na Herdade Experimental da Almocreva (Beja) em solos de barro, cartografados como Bvc (Barros castanho-avermelhados de calcários), sendo num dos ensaios, a cultura instalada em sementeira direta e no outro, através do sistema de mobilização reduzida. Os resultados obtidos demonstraram que o herbicida Hussar Plus é bastante eficaz no controlo do balanco-maior, mesmo quando aplicado numa fase mais avançada do desenvolvimento desta infestante, principalmente quando as doses aplicadas são as recomendadas

  • Effect of reduced doses of a post-emergence graminicide to control Avena Sterilis L. and Lolium rigidum G. in no-till wheat under Mediterranean environment
    Elsevier RSS feed Agricultural Sciences, 2008
    Co-Authors: Barros José, Basch G., Carvalho Mário
    Abstract:

    The study was carried out over 2 years (2004–2005 and 2005–2006) in a private farm in the Alentejo region (E´ vora), in the south of Portugal where rainfed wheat is sown after the beginning of the winter rainfall season. The wheat crop used for this study was established using no-till, as this technology provides the necessary machine-bearing capacity of the soil to assure post-emergence application of herbicides at different weed development stages. A mixture of clodinafop+cloquintocete was applied using three different dosages and volumes on two dates. The results indicate that lower herbicide doses than those recommended by the manufacturer were sufficient to achieve a high Avena Sterilis L. and Lolium rigidum G. control efficiency and consequently potential grain yield, when the treatments were carried out on an early application date (beginning of tillering). When the herbicide application was delayed (complete tillering) it was necessary to increase the herbicide dose in order to achieve the highest grain yield. There was a positive and significant correlation between weed control efficiency and grain yield, but the respective correlation coefficient was not very high. This is because at the first application stage, both weeds and crop were more sensitive to the herbicide and consequently there was some crop phytotoxicity caused by the herbicide when its concentration increased. Weed reinfestation was low for both application dates, indicating that lower herbicide doses than the recommended ones can be used for satisfactory control of A. Sterilis L. and L. rigidum G

  • Controlo de infestantes monocotiledóneas em pós-emergência na cultura do trigo em sementeira directa. Ensaio: Topik
    2006
    Co-Authors: Barros José, Nunes Pedro
    Abstract:

    No ano agrícola de 2005/2006, realizou-se um ensaio cujo objectivo foi estudar o efeito de doses iguais e inferiores às recomendadas de clodinafope + cloquintocete (Topik) no controlo de infestantes monocotiledóneas em pós-emergência e, na produção de trigo de Inverno em sementeira directa. Na área de ensaio onde se aplicou o herbicida, predominavam claramente as monocotiledóneas Lolium rigidum G. (Azevém anual) e a Avena Sterilis L As dicotiledóneas mais representativas eram as seguintes: Polygonum aviculare L. (sempre – noiva); Chamaemelum mixtum L. (margaça); Torilis arvensis (Huds) Link (salsinha); Plantago afra L. (plantagro); Galium aparine L. (amor de hortelão); Diplotaxis catholica L. (grizandra); Lactuca serriola L. (alface-brava-menor); Laminum amplexicaule L. (chucapitos); Daucus carota L. (cenoura-brava); Scandix pecten-veneris L. (agulha-de- pastor) e Anagallis arvensis L. (morrião). Os ensaios realizaram-se na herdade da Revilheira, pertença da Direcção Regional de Agricultura do Alentejo (DRAAL) situada no Concelho de Reguengos de Monsaraz. Os resultados obtidos mostram que o herbicida Topik é bastante eficiente no controlo da Avena Sterilis L. (balanco-maior) em pós-emergência na cultura do trigo mesmo para doses inferiores às recomendadas, principalmente quando a aplicação do herbicida é efectuada numa fase mais precoce do desenvolvimento da infestante. A eficiência deste herbicida baixa quando a infestante a controlar é o Lolium rigidum G. e as doses utilizadas são inferiores às recomendadas, continuando contudo, a fase mais temporã do desenvolvimento da infestante (início do afilhamento) a ser mais eficaz que a fase mais tardia (afilhamento completo). Uma maior eficiência no controlo das infestantes e um menor período de competição destas com a cultura conduziram para a generalidade dos tratamentos, a uma maior produção de grão quando estas foram efectuadas na fase de início de afilhamento das infestantes (1ª época de aplicação)

  • Efeito de doses inferiores às recomendadas de diclofope-metilo no controlo em pós-emergência da Avena Sterilis L. (Balanco) e do Lolium rigidum G. (erva-febra) em trigo sob sementeira directa
    'Sociedade de Ciencias Agrarias de Portugal', 2006
    Co-Authors: Barros José, Carvalho Mário, Basch G.
    Abstract:

    Aspectos de ordem económica e ambiental têm conduzido nos últimos anos em quase todo o mundo, à redução da aplicação de agroquímicos, nomeadamente herbicidas. No sentido de reduzir a aplicação de herbicidas, pode ser possível combinar doses inferiores às recomendadas pelos fabricantes com volumes de água, estádios de desenvolvimento das infestantes e sistemas de mobilização do solo adequados. O objectivo deste trabalho foi o de estudar a eficácia do diclofope-metilo (Illoxan), no controlo da Avena Sterilis L. (balanco-maior) e da erva-febra (Lolium rigidum G.) em trigo de Inverno sob sementeira directa, combinando doses inferiores às recomendadas (1; 1.5 e 2 l ha-1) com volumes de água também inferiores (100; 200 e 300 l ha-1), em dois estádios de desenvolvimento das infestantes (início do afilhamento e afilhamento completo). As doses de herbicida recomendadas para controlar as infestantes em estudo são 2.5 – 3 l ha-1) e os volumes de água recomendados variam entre 350 – 600 l ha-1. Os resultados obtidos mostram para a generalidade dos tratamentos, que a aplicação do herbicida numa fase mais precoce do desenvolvimento das infestantes (início do afilhamento) conduz a uma maior produção de grão na cultura do trigo em sementeira directa. Neste estádio de desenvolvimento, quer as infestantes quer a própria cultura, estão mais sensíveis ao herbicida e, como consequência, à maior eficácia não correspondeu a maior produção de grão, porque houve alguma fitotoxicidade causada na cultura pelo herbicida, quando a sua concentração aumentou. Constatou-se em ambos os estádios de desenvolvimento, não ser necessária uma maior eficácia para se obter a produção de grão mais alta. A reinfestação foi baixa para ambas as infestantes e épocas de aplicação, o que permitirá em sementeira directa, um controlo mais cedo das infestantes, quando estas estão mais sensíveis ao herbicida. Isto, torna possível o uso de doses mais baixas de herbicida do que o recomendado pelo fabricante (2.5 – 3 l ha-1) e do que o normalmente utilizado pelos agricultores (2 l ha-1) combinando a dose com um adequado volume de água e uma época de aplicação mais temporã para controlar em pós-emergência, a Avena Sterilis L. e o Lolium rigidum G. em trigo de sementeira directa. Quando a aplicação do herbicida foi atrasada (afilhamento completo), foi necessário uma maior dose de herbicida para obter maiores produções de grão na cultura

  • Controlo de infestantes monocotiledóneas em pós-emergência na cultura do trigo em sementeira directa. Ensaio Topik
    2005
    Co-Authors: Barros José, Fernandes João
    Abstract:

    No ano agrícola de 2004/2005, realizou-se um ensaio cujo objectivo foi estudar o efeito de doses inferiores às recomendadas de clodinafope + cloquintocete (Topik) no controlo de infestantes monocotiledóneas em pós-emergência e, na produção de trigo de Inverno em sementeira directa. Na área de ensaio onde se aplicaram os herbicidas, predominavam claramente as monocotiledóneas Lolium rigidum G. (Azevém anual) e a Avena Sterilis L. Outra monocotiledónea que estava presente mas que não foi contabilizada, era o Bromus diandrus R. As dicotiledóneas mais representativas eram as seguintes: Chrysanthemum segetum L. (pampilho-das-searas); Echium plantagineum L. (soagem); Polygonum aviculare L. (sempre – noiva); Raphanus raphanistrum L. (Saramago); Rumex conglomeratus M. (labaça-ordinária); Chamaemelum mixtum L. (margaça); Silene nocturna L. (cabacinha); Calendula arvensis L. (erva-vaqueira) e Stellaria media L. (morugem-branca). Paralelamente, realizou-se outro ensaio onde se estudou o efeito de diversos tratamentos, no controlo das monocotiledóneas. Os ensaios realizaram-se numa herdade privada do Concelho de Évora (Herdade do Louseiro), que dista aproximadamente 10 km desta cidade

Cordero Fernando - One of the best experts on this subject based on the ideXlab platform.

  • Modeling emergence of sterile oat (Avena Sterilis ssp. ludoviciana) under semiarid conditions
    'Cambridge University Press (CUP)', 2021
    Co-Authors: Sousa Ortega Carlos, Royo-esnal Aritz, Cordero Fernando, Loureiro Iñigo, Marí León, Ana Isabel, Saavedra Saavedra Milagros, Paramio, José A., Fernández, José L., Torra Joel, Urbano, José M.
    Abstract:

    Winter wild oat [Avena Sterilis ssp. ludoviciana (Durieu) Gillet & Magne; referred to as A. Sterilis here] is one of the major weed species of the Avena genus, given its high competitive ability to infest cereal crops worldwide, with special concern in Spain. A nine-location field experiment was established across Spain where a total of 400 A. Sterilis seeds per location were sowed in four replicates in autumn 2016 to monitor the emergence during two growing seasons in dryland conditions. The data were used to test the prediction ability of previously published thermal (TT) and hydrothermal time (HTT) models and to develop new models, if required. Overall, the average percentage of emergence was 30% during the first season and 21% during the second season. In both seasons, the main emergence flush occurred between November and February. According to the phenological stage, A. Sterilis achieved the tillering earlier in southern sites, between November 25 and the end of December, compared with northern sites, where this stage was reached at the end of January. The newly developed model described the emergence with precision, using three cardinal temperatures to estimate the TT. The three cardinal points were established at −1.0, 5.8, and 18.0 C for base (T b), optimum (T o), and ceiling temperature (T c), while the base water potential (Ψb) was established at −0.2 MPa for the HTT estimation. This study contributes to improving prediction of the emergence of A. Sterilis and provides knowledge for decision support systems (DSS) for the control of this weed.Publishe

  • Modeling emergence of sterile oat (Avena Sterilis ssp. ludoviciana) under semiarid conditions
    'Cambridge University Press (CUP)', 2021
    Co-Authors: Sousa Ortega Carlos, Royo-esnal Aritz, Cordero Fernando, Saavedra Milagros, Paramio, José Antonio, Loureiro Iñigo, Marí León, Ana Isabel, Lezáun San Martín, Juan Antonio, Fernández, José Luis, Torra Joel
    Abstract:

    Winter wild oat [Avena Sterilisssp. ludoviciana (Durieu) Gillet & Magne; referred to as A. Sterilis here] is one of the major weed species of the Avena genus, given its high competitive ability to infest cereal crops worldwide, with special concern in Spain. A nine-location field experiment was established across Spain where a total of 400 A. Sterilis seeds per location were sowed in four replicates in autumn 2016 to monitor the emergence during two growing seasons in dryland conditions. The data were used to test the prediction ability of previously published thermal (TT) and hydrothermal time (HTT) models and to develop new models, if required. Overall, the average percentage of emergence was 30% during the first season and 21% during the second season. In both seasons, the main emergence flush occurred between November and February. According to the phenological stage, A. Sterilis achieved the tillering earlier in southern sites, between November 25 and the end of December, compared with northern sites, where this stage was reached at the end of January. The newly developed model described the emergence with precision, using three cardinal temperatures to estimate the TT. The three car dinal points were established at −1.0, 5.8, and 18.0 C for base (Tb), optimum (To), and ceiling temperature (Tc), while the base water potential (Ψb) was established at −0.2 MPa for the HTT estimation. This study contributes to improving prediction of the emergence of A. Sterilis and provides knowledge for decision support systems (DSS) for the control of this weed.We would like to thank first the funding institutions, Cátedra Adama and the Spanish Weed Science Society (SEMh), with special mention of Cátedra Adama, which financed the article publishing charges. Also, JT acknowledges support from the Spanish Ministry of Science, Innovation and Universities (grant Ramon y Cajal RYC2018-023866-I). We also want to thank the students and the technicians that have helped with the fieldwork for this experiment in different sites, without whose help data col lection would have been more difficult. No conflicts of interest have been declared

  • Biology and Agroecology Group of the Spanish Weed Science Society (SEMh): emergence and growth of Avena Sterilis, Centaurea diluta, Chrysanthemum segetum, Lolium rigidum and Ridolfia segetum
    Universidad Pública de Navarra Nafarroako Unibertsitate Publikoa, 2017
    Co-Authors: Royo-esnal Aritz, Lezáun, Juan Antonio, Escorial, María Concepción, Marí, Ana Isabel, Cordero Fernando, Vargas Manuel, Saavedra Milagros, Paramio, José Antonio, Sousa Carlos, Izquierdo Jordi
    Abstract:

    Comunicación presentada al XVI Congreso de la Sociedad Española de Malherbología, celebrado en la Universidad Pública de Navarra entre los días 25 y 27 de octubre de 2017.En este trabajo presentamos los primeros resultados de emergencia de cinco especies malas hierbas preocupantes en España: Avena Sterilis L., Centaurea diluta Ait., Chrysanthemum segetum L., Lolium rigidum G. y Ridolfia segetum L. Se sembraron semillas de estas especies en 13 localidades diferentes distribuidas por toda España. Para cada especie se utilizaron 100 semillas y hubo cuatro repeticiones. La siembra se realizó tras remover el suelo de 0 a 2 cm de profundidad, salvo en A. Sterilis (de 0 a 10 cm), en marcos de plantación divididos en seis celdas, uno de testigo, de 0,25 × 0,25 m2. Se realizaron muestreos de emergencia en intervalos de entre 2 y 7 días. Los resultados muestran que las especies más precoces fueron C. diluta y L. rigidum, seguidas por A. Sterilis. Estas tres especies fueron también las que presentaron mayores porcentajes de emergencia.In the present work the results of the emergence of five worrying weed species in Spain are presented: Avena Sterilis, Centaurea diluta, Chrysanthemum segetum, Lolium rigidum and Ridolfia segetum. Seeds of each species were sown in 13 locations distributed throughout Spain. For each species 100 seeds were sown disturbing the soil down to 2 cm (10 cm for A. Sterilis) in planting marks divided in six 0.25 × 0.25 m2 cells, with four replications. Samplings were performed every 2-7 days. The results show that C. diluta and L. rigidum, followed by A. Sterilis, were the first emerging species. These three species were also those which showed higher emergence percentages.Este proyecto ha sido financiado por la Cátedra Adama de la Universidad de Sevilla y por la Sociedad Española de Malherbología

  • Biology and Agroecology Group of the Spanish Weed Science Society (SEMh): emergence and growth of Avena Sterilis, Centaurea diluta, Chrysanthemum segetum, Lolium rigidum and Ridolfia segetum
    Universidad Publica de Navarra. Biblioteca, 2017
    Co-Authors: Royo Esnal A., Escorial, María Concepción, Marí, Ana Isabel, Cordero Fernando, Urbano Fuentes-guerra, José María, Royuela Hernando Mercedes
    Abstract:

    In the present work the results of the emergence of five worrying weed species in Spain are presented: Avena Sterilis, Centaurea diluta, Chrysanthemum segetum, Lolium rigidum and Ridolfia segetum. Seeds of each species were sown in 13 locations distributed throughout Spain. For each species 100 seeds were sown disturbing the soil down to 2 cm (10 cm for A. Sterilis) in planting marks divided in six 0.25 × 0.25 m2 cells, with four replications. Samplings were performed every 2-7 days. The results show that C. diluta and L. rigidum, followed by A. Sterilis, were the first emerging species. These three species were also those which showed higher emergence percentagesEn este trabajo presentamos los primeros resultados de emergencia de cinco especies malas hierbas preocupantes en España: Avena Sterilis L., Centaurea diluta Ait., Chrysanthemum segetum L., Lolium rigidum G. y Ridolfia segetum L. Se sembraron semillas de estas especies en 13 localidades diferentes distribuidas por toda España. Para cada especie se utilizaron 100 semillas y hubo cuatro repeticiones. La siembra se realizó tras remover el suelo de 0 a 2 cm de profundidad, salvo en A. Sterilis (de 0 a 10 cm), en marcos de plantación divididos en seis celdas, uno de testigo, de 0,25 × 0,25 m2. Se realizaron muestreos de emergencia en intervalos de entre 2 y 7 días. Los resultados muestran que las especies más precoces fueron C. diluta y L. rigidum, seguidas por A. Sterilis. Estas tres especies fueron también las que presentaron mayores porcentajes de emergenci

  • Interaction of seed densities and crop rotations in conventional agriculture and its effect on weeds and cereal yield, 24 years of experimentation
    Universidad Pública de Navarra Nafarroako Unibertsitate Publikoa, 2017
    Co-Authors: Cordero Fernando, Estalrich Enrique, Lacasta Carlos
    Abstract:

    Comunicación presentada al XVI Congreso de la Sociedad Española de Malherbología, celebrado en la Universidad Pública de Navarra entre los días 25 y 27 de octubre de 2017.En un experimento de 24 años (1992-2016) en el que se evalúa la interacción de dos formas tradicionales de control de malas hierbas, rotación de cultivos y densidades de siembra y su efecto sobre la productividad del cereal se ha realizado en los últimos 15 años (2002-2016) un seguimiento de la flora arvense. Los resultados indican que el monocultivo tiene el doble de recubrimiento de malas hierbas que las parcelas sometidas a rotación de cultivos. El efecto del herbicida se ha notado en todas las rotaciones. Avena Sterilis está relacionada con el monocultivo y la rotación con veza forraje, y Lolium rigidum, solo con monocultivo. En el monocultivo hay alternancia en las especies de malas hierbas, pasando algunas de ser importantes a secundarias.In a 24 years experiment (1992-2016) in which we evaluated the interaction of two traditional forms of weed control, crop rotation and seed densities and their effect on cereal productivity, in the last 15 years (2002-2016) a monitoring of the weeds. The results indicate that monoculture has twice as much weed overlay as plots subject to crop rotation. The effect of the herbicide has been noted at all rotations. Avena Sterilis is related to monoculture and rotation forage wetch and Lolium rigidum only with monoculture. In monoculture there is alternation in weed species, going from being important to secondary.Los autores agradecen al Servicio de Investigación de la Consejería de Agricultura de la Junta de Comunidades de Castilla-La Mancha por la financiación de los experimentos de larga duración que se realizan en la finca experimental La Higueruela

Izquierdo Jordi - One of the best experts on this subject based on the ideXlab platform.

  • Biology and Agroecology Group of the Spanish Weed Science Society (SEMh): emergence and growth of Avena Sterilis, Centaurea diluta, Chrysanthemum segetum, Lolium rigidum and Ridolfia segetum
    Universidad Pública de Navarra Nafarroako Unibertsitate Publikoa, 2017
    Co-Authors: Royo-esnal Aritz, Lezáun, Juan Antonio, Escorial, María Concepción, Marí, Ana Isabel, Cordero Fernando, Vargas Manuel, Saavedra Milagros, Paramio, José Antonio, Sousa Carlos, Izquierdo Jordi
    Abstract:

    Comunicación presentada al XVI Congreso de la Sociedad Española de Malherbología, celebrado en la Universidad Pública de Navarra entre los días 25 y 27 de octubre de 2017.En este trabajo presentamos los primeros resultados de emergencia de cinco especies malas hierbas preocupantes en España: Avena Sterilis L., Centaurea diluta Ait., Chrysanthemum segetum L., Lolium rigidum G. y Ridolfia segetum L. Se sembraron semillas de estas especies en 13 localidades diferentes distribuidas por toda España. Para cada especie se utilizaron 100 semillas y hubo cuatro repeticiones. La siembra se realizó tras remover el suelo de 0 a 2 cm de profundidad, salvo en A. Sterilis (de 0 a 10 cm), en marcos de plantación divididos en seis celdas, uno de testigo, de 0,25 × 0,25 m2. Se realizaron muestreos de emergencia en intervalos de entre 2 y 7 días. Los resultados muestran que las especies más precoces fueron C. diluta y L. rigidum, seguidas por A. Sterilis. Estas tres especies fueron también las que presentaron mayores porcentajes de emergencia.In the present work the results of the emergence of five worrying weed species in Spain are presented: Avena Sterilis, Centaurea diluta, Chrysanthemum segetum, Lolium rigidum and Ridolfia segetum. Seeds of each species were sown in 13 locations distributed throughout Spain. For each species 100 seeds were sown disturbing the soil down to 2 cm (10 cm for A. Sterilis) in planting marks divided in six 0.25 × 0.25 m2 cells, with four replications. Samplings were performed every 2-7 days. The results show that C. diluta and L. rigidum, followed by A. Sterilis, were the first emerging species. These three species were also those which showed higher emergence percentages.Este proyecto ha sido financiado por la Cátedra Adama de la Universidad de Sevilla y por la Sociedad Española de Malherbología

  • Field evaluation of a decision support system for herbicidal control of Avena Sterilis ssp. ludoviciana in winter wheat
    'Wiley', 2013
    Co-Authors: González-andújar, José Luis, González Díaz Lucía, Bastida F., Lezáun, Juan Antonio, Izquierdo Jordi, Fernández-quintanilla César, Calvo R, Perea F, Sánchez Del Arco, J., Urbano, José M.
    Abstract:

    Two field studies were conducted in Central and Northern Spain over a total of five seasons to assess the usefulness of a decision support system (Avena-PC) from agronomic, economic and environmental points of view on herbicidal control of Avena Sterilis ssp. ludoviciana in winter wheat. The control treatments evaluated were: (i) Avena-PC-based recommendations, (ii) full herbicide dose (standard farmer practice), (iii) half herbicide dose and (iv) no herbicide. The herbicide rates used in the Avena-PC treatment averaged 65% and 30% lower than the full and half dose treatments respectively. Avena-PC implementation controlled A. ludoviciana with similar efficacy as standard herbicide treatments. Nevertheless, it did support a reduction in relation to the non-herbicide treatment. Yields obtained with Avena-PC were, in general, not statistically different to those obtained with herbicide treatments and were on average 69% higher than those in the no herbicide application strategy. Comparing Avena-PC economic performance with the other treatments there were, in general, no significant statistical differences in Central Spain. In Northern Spain, all herbicide treatments had similar net returns, with there being no statistical differences between Avena-PC and the herbicide treatments. However, there were differences recorded with the non-herbicide treatment. The results of this research indicate that Avena-PC, due to its flexibility, may recommend less herbicide than the standard farmer practice, providing clear environmental benefits and adequate weed control with maintained crop yield and net returns similar to standard farmer practice. © 2010 European Weed Research Society.This work was supported by FEDER funds and the Spanish Ministry of Innovation and Science (project AGL 2002-3801).Peer Reviewe

  • Validacion de sistemas de soporte a la decisión para el control integrado de la Avena loca (Avena Sterilis spp ludoviciana) y vallico (Lolium rigidum L.) en cereales
    2005
    Co-Authors: González-andújar, José Luis, Izquierdo Jordi, Fernández-quintanilla César, Calvo R, Perea F, C. De ,lucas, González Ponce Ricardo, Lezaún J. M., Sánchez M. J.
    Abstract:

    6 pÁGINAS[EN] Decision Support Systems (DSS) can be of great help in agriculture by facilitating technology transfer. In this context, two DSS have been developed as support systems for winter wild oat (Avena Sterilis spp. ludoviciana) and ryegrass (Lolium rigidum) control in cereals. Both systems integrate a bioeoconomic model with a data base. The DSS output is a table of recommendations, sorted by economic criteria. Both DSS systems have been developed in two versions: one is a PC version that operates under Windows 98 and XP, requires 16 Mb RAM and 40 Mb of hard disk, and the second is a web-based system. Both DSS are currently being validated under field conditions. Preliminary results have shown good behaviour of both systems, especially in the reduction of the amounts of herbicide applied. [ES] Los Sistemas de Soporte a la DecisiOn (SSD) pueden ser de gran utilidad en la agricultura, propiciando la transferencia de tecnologia. Dentro de este contexto han sido desarrollados dos SSD como sistemas de ayuda para el control integrado de la Avena loca (Avena Sterilis spp. ludoviciana) y el vallico (Lolium rigidum) en cereales. Ambos sistemas estan integrados por un modelo bioeconOmico, junto con una base de datos, que contiene medidas de control. Los sistemas producen una tabla de recomendaciones, ordenada en base a criterios econOmicos. Ambos sistemas han sido desarrollados en dos versiones: una para PC que trabajan bajo entorno Windows 98 y XP, requiere 16 Mb de memoria RAM y 40 Mb de espacio en el disco duro, y otra para su use en Internet. Ambos SSD estan actualmente siguiendo un proceso de validaciOn en condiciones de campo, siendo los primeros resultados muy positivos, especialmente en relaciOn a la reducciOn de la cantidades de herbicidas aplicadas.Ministerio de Ciencia y Tecnologia de España.Plan Nacional AGL2002-3801.Peer reviewe

González-andújar, José Luis - One of the best experts on this subject based on the ideXlab platform.

  • A Bioeconomic Model for the Analysis of Control Strategies for Lolium rigidum and Avena Sterilis ssp. ludoviciana in Winter Wheat
    'Springer Science and Business Media LLC', 2021
    Co-Authors: González Díaz Lucía, Bastida F., González-andújar, José Luis
    Abstract:

    The bioeconomic models developed in Weed Science consider the effect of a species on the crop. Bioeconomic models accounting for species interactions within the weed community might represent more realistic approximation to the economic outcome of weed control options in Mediterranean cereal crops. A bioeconomic model, based in community dynamics, competition and economic submodels, was developed and used to investigate the long-term agronomic, economic and environmental consequences of using herbicide-based strategies for the control of winter wild oats (Avena Sterilis) and rigid ryegrass (Lolium rigidum) in winter wheat. The results of simulations indicated that different winner strategies can be postulated depending on selection criterion. Based on purely economic outcome, the best strategy was the application of half-dose herbicide to both species whereas if the goal is to achieve a long-term economically viable and environmental friendly decision making, then the strategy chosen would be the one based on a full-dose herbicide application for the control of L. rigidum and half-dose for control of A. Sterilis. The sensitivity of the model to variation in economic and competition parameters was checked. The most sensitive model parameters were the potential yield and the wheat price. Bioeconomic models offer practical guidance regarding the possibilities and limitations of various strategic approaches for weed control.This work has been partially funded by FEDER (European Regional Development Funds) and the Spanish Ministry of Economy and Competitiveness funds (Projects AGL2015-63130-R)

  • AvenaNET and VallicoNET: DSS for Avena Sterilis and Lolium rigidum Control in Spanish Dryland Cereal Crops
    'Springer Science and Business Media LLC', 2021
    Co-Authors: González-andújar, José Luis
    Abstract:

    AvenaNET and VallicoNET are web-based DSS developed for Lolium rigidum (ryegrass) and Avena Sterilis spp. ludoviciana (winter wild oat) control in Spanish dryland cereals. This chapter describes the rationale, structure and evaluation of these DSS. Both systems present a common structure that contains an interface, a database and a bioeconomic model. The interface has been kept as simple as possible, and it requires simple agronomic, biological and economic data. The databases store information on the available herbicides for the control of A. Sterilis and L. rigidum. The bioeconomic model contains a detailed life cycle structure including integrated management strategies, weed-crop competition and economic submodels. Both DSS followed an evaluation process consisting of the verification of the functions contained in the system, its ergonomics and the evaluation in field conditions. The validation results revealed that the performance of both systems was satisfactory

  • Potential distribution of Avena Sterilis L. In Europe under climate change
    'Wiley', 2015
    Co-Authors: Castellanos-frías Elena, Pujadas-salvá, Antonio José, Dorado José, García De León, David, González-andújar, José Luis
    Abstract:

    Avena Sterilis (sterile oat) is one of the most extended and harmful weeds in Mediterranean cereal crops. A process-based niche model for this species was developed using CLIMEX. The model was validated and used to assess the potential distribution of A. Sterilis in Europe under the current climate and under two climate change scenarios. Both scenarios represent contrasting temporal patterns of economic development and CO2 emissions. The projections under current climate conditions indicated that A. Sterilis does not occupy the full extent of the climatically suitable habitat available to it in Europe. Under future climate scenarios, the model projection showed a gradual advance of sterile oat towards Northeastern Europe and a contraction in Southern Europe. The infested potential area increases from the current 45.2% to 51.3% in the low-emission CO2 scenario and to 59.5% under the most extreme scenario. These results provide the necessary knowledge for identifying and highlighting the potential invasion risk areas and for establishing the grounds on which to base the planning and management measures required. The main actions should be focused on controlling the large-scale seed scattering, preventing seed dispersal into potentially suitable areas.This work was funded by the Spanish Ministry of Economy and Competitiveness, Consejería de Educación y Ciencia de la Junta de Comunidades de Castilla-La Mancha of Spain and the FEDER funds (project POII10-0123- 5554 and project AGL2012-33736).Peer Reviewe

  • Potential geographical distribution of Avena Sterilis L. in Europe
    International Weed Science Society, 2014
    Co-Authors: Castellanos-frías Elena, Pujadas-salvá, Antonio José, Dorado José, González-andújar, José Luis
    Abstract:

    Trabajo presentado en el 6th International Weed Science Congress, celebrado en Hangzhou (China) del 17 al 22 de junio de 2012.Global Climate Change is a major concern for the future sustainability of our development. There will be large alterations over the global ecosystems, where predictions indicate a reduction around 10-20% of world agrosystems production. Climate change might have a deep effect on crop protection. Especially affected would be the weed flora, altering the competitive interaction crop-weed, impacting on weed biodiversity and on weed geographic distribution. Avena Sterilis L. (sterile oat) is one of the most extended and harmful specie in Mediterranean climate. The emergence of sterile oat is very dependent of temperature and rainfall. Therefore, it is very likely that geographic distribution of A. Sterilis might be affected by climate change. The objective of this study was to simulate the effect of various climate change scenarios. A specie niche model for A. Sterilis was developed using CLIMEX. The model calibration was done with eco-physiological data from the literature and was validated with independent data worldwide. Two contrasting climate scenarios were used to project the potential distribution of A. Sterilis in Europe under future climate: A2 representing a low-emission scenario and B2 a high-emission scenario. Under both future climate change scenarios, the range of suitable climate for sterile oat in Europe is projected to extend further from Mediterranean regions northward in Scandinavia, Ireland and England and eastward into east Europe (balcanians countries). In contrary, countries in the Mediterranean area, from Portugal to Greece will become unsuitable under the low-emission scenario (B2 scenario) and mostly unsuitable for persistence under the highemission scenario (A2 scenario).Peer Reviewe

  • Field evaluation of a decision support system for herbicidal control of Avena Sterilis ssp. ludoviciana in winter wheat
    'Wiley', 2013
    Co-Authors: González-andújar, José Luis, González Díaz Lucía, Bastida F., Lezáun, Juan Antonio, Izquierdo Jordi, Fernández-quintanilla César, Calvo R, Perea F, Sánchez Del Arco, J., Urbano, José M.
    Abstract:

    Two field studies were conducted in Central and Northern Spain over a total of five seasons to assess the usefulness of a decision support system (Avena-PC) from agronomic, economic and environmental points of view on herbicidal control of Avena Sterilis ssp. ludoviciana in winter wheat. The control treatments evaluated were: (i) Avena-PC-based recommendations, (ii) full herbicide dose (standard farmer practice), (iii) half herbicide dose and (iv) no herbicide. The herbicide rates used in the Avena-PC treatment averaged 65% and 30% lower than the full and half dose treatments respectively. Avena-PC implementation controlled A. ludoviciana with similar efficacy as standard herbicide treatments. Nevertheless, it did support a reduction in relation to the non-herbicide treatment. Yields obtained with Avena-PC were, in general, not statistically different to those obtained with herbicide treatments and were on average 69% higher than those in the no herbicide application strategy. Comparing Avena-PC economic performance with the other treatments there were, in general, no significant statistical differences in Central Spain. In Northern Spain, all herbicide treatments had similar net returns, with there being no statistical differences between Avena-PC and the herbicide treatments. However, there were differences recorded with the non-herbicide treatment. The results of this research indicate that Avena-PC, due to its flexibility, may recommend less herbicide than the standard farmer practice, providing clear environmental benefits and adequate weed control with maintained crop yield and net returns similar to standard farmer practice. © 2010 European Weed Research Society.This work was supported by FEDER funds and the Spanish Ministry of Innovation and Science (project AGL 2002-3801).Peer Reviewe

Douaik Ahmed - One of the best experts on this subject based on the ideXlab platform.

  • Efficacité de quelques séquences d'herbicides contre les mauvaises herbes du pois chiche et de la féverole conduits en semis direct
    IAV Hassan II, 2016
    Co-Authors: Hajjaj Badr, Bouhache Mohamed, Mrabet Rachid, Taleb Abdelkader, Douaik Ahmed
    Abstract:

    In order to evaluate the efficacy of 18 sequences of pre and post emergence herbicides on weeds of no till faba bean and chickpea and their impact on crops grain yield, two trials were conducted during 2014-2015 growing season at Sidi El Aidi INRA research station and at a farmer’s farm in Ouled Said (Settat). Dominant species of weed flora in chickpea in Sidi El Aidi were: Bromus rigidus, Lolium rigidum, Avena Sterilis, Cichorium endivia, Centaurea diluta, Emex spinosa and Papaver rhoeas. Dominant species of weed flora in faba bean at Ouled Said were: Avena Sterilis, Plantago afra, Chrysanthemum coronarium, Centaurea diluta, Sonchus oleraceus and Silybum marianum. The obtained results showed that herbicides react differently on weed and crops. Treatments which showed good weed control and better selectivity provided the best crop yield. “Pendimethalin (1258,5 g/ha ) + Bentazon (960 g/ha)” and “Acetochlor (2100 g/ha) + Bentazon (960 g/ha)” provided good weed control and good selectivity in horse bean crop. “Pendimethalin (1258,5 g/ha) + Bentazon (960 g/ha)” needs to be more tested on chickpea before its recommendation on this crop.  Keywords: herbicides, efficacy, weeds, horse bean, chick pea, no-till.Dans le but d’évaluer l’efficacité de différentes séquences d’herbicides de pré levée et post levée sur les mauvaises herbes associées au pois chiche et à la féverole en semis direct et leur impact sur le rendement grain, 18 séquences d’herbicides ont été testées à la station expérimentale de la recherche agronomique de Sidi El Aïdi et sur une parcelle d’un agriculteur dans la région d’Ouled Saïd (Settat) durant la campagne agricole 2014/2015. Les espèces dominantes au site de Sidi El Aïdi dans le pois chiche sont: Bromus rigidus, Lolium rigidum, Avena Sterilis, Cichorium endivia, Centaurea diluta, Emex spinosa, Papaver rhoeas. Dans la féverole au site d’Ouled Saïd, les espèces suivantes ont été dominantes: Avena Sterilis, Plantago afra, Chrysanthemum coronarium, Centaurea diluta, Sonchus oleraceus et Silybum marianum. Les résultats obtenus ont montré que les différents herbicides agissent différemment sur les mauvaises herbes et sur les cultures. Les traitements qui ont assuré une bonne efficacité et les meilleures sélectivités sur les cultures ont permis d’engendrer les meilleurs rendements grain. Les séquences “Pendiméthaline (1258,5 g/ha) + Bentazone (960 g/ha)” et “Acétochlor (2100 g/ha) + Bentazone (960 g/ha)” ont donné des bonnes efficacités sur les mauvaises herbes et une sélectivité satisfaisante sur la féverole. Sur le pois chiche, la séquence “Pendiméthaline (1258,5 g/ha) + Bentazone (960 g/ha)” nécessite d’être testée davantage dans différents sites avant sa recommandation sur cette culture. Mots clés: herbicides, efficacité, mauvaises herbes, féverole, pois chiche, semis direct.  

  • Efficacité de quelques herbicides des céréales dans une culture du blé tendre conduite en semis direct
    IAV Hassan II, 2016
    Co-Authors: Hajjaj Badr, Bouhache Mohamed, Mrabet Rachid, Taleb Abdelkader, Douaik Ahmed
    Abstract:

    In order to evaluate the efficacy of 11 cereal herbicides on no till soft wheat, two trials were conducted in Chaouia region during 2014-2015 growing season. Dominant species of weed flora in Sidi El Aidi site were: Bromus rigidus, Lolium rigidum and Avena Sterilis. Dominant species of weed flora in Ouled Said site were:  Avena Sterilis, Centaurea diluta and Papaver rhoeas. The obtained results showed that “Pyroxsulam” and “Mesosulfuron Sodium + Iodosulfuron sodium” gavethe best efficacy on rip gut brome. Prosulfocarb provided excellent control of ryegrass but no effect on ripgut brome or wild oat. Broadleaf herbicides provided moderate to good control. “Mesosulfuron Sodium +Iodosulfuron sodium” need to be completed with an broadleaf herbicide in case centaurea diluta is present. “Pyroxsulam” need to be tank mixed with a broadleaf herbicide to widen its weeds spectrum. Treatment with “Pendimethalin”as pre-emergence herbicide allowed an early complete control of weeds and good crop selectivity. Keywords: No-till, cereals, herbicides, weeds, ChaouiaDans l’intérêt d’évaluer l’efficacité de 11 herbicides des céréales dans une culture du blé tendre en semis direct, deux essais ont été conduits dans la région de la Chaouia durant la campagne agricole 2014-2015. L’inventaire floristique a révélé la dominance des espèces graminées dans le site de Sidi El Aïdi à savoir le brome rigide (Bromus rigidus), l’ivraie raide (Lolium rigidum) et la folle avoine (Avena Sterilis). Dans le site d’Ouled Said, les espèces suivantes ont été dominantes: la folle avoine (Avena Sterilis), la centaurée élancée (Centaurea diluta) et le coquelicot (Papaver rhoeas). Les résultats obtenus sur l’impact des herbicides sur le brome (Bromus rigidus) ont révélé que «Pyroxsulam» et «Mesosulfuron Sodium +Iodosulfuron sodium» ont  donné la meilleure efficacité sur cette espèce. Prosulfocarbe a permis un excellent contrôle de l’ivraie raide mais sans aucun effet sur le brome et la folle avoine. Les traitements antidicotylédones ont donné des niveaux de contrôle moyens à bons. Le traitement à base de « Mesosulfuron Sodium +Iodosulfuron sodium» doit être complété avec un traitement de rattrapage en présence de la centaurée élancée. Le traitement à base «Pyroxsulam» doit être mélangé avec un herbicide antidicotylédones pour élargir son spectre d’efficacité. Le traitement de prélevée à base de «Pendiméthaline» a permis d’anéantir les mauvaises herbes du début de cycle avec une bonne sélectivité vis-à-vis de la culture. Mots clés: Semis direct, céréales, herbicides, mauvaises herbes, Chaoui

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