Alabama argillacea

14,000,000 Leading Edge Experts on the ideXlab platform

Scan Science and Technology

Contact Leading Edge Experts & Companies

Scan Science and Technology

Contact Leading Edge Experts & Companies

The Experts below are selected from a list of 792 Experts worldwide ranked by ideXlab platform

Parra, José Roberto P. - One of the best experts on this subject based on the ideXlab platform.

  • Species in Trichogramma parasitoid of Alabama argillacea. II. Fertility life table and parasitism of three strains of Trichogramma sp.
    Embrapa, 2014
    Co-Authors: Bleicher Ervino, Parra, José Roberto P.
    Abstract:

    Estudaram-se as tabelas de vida de fertilidade e capacidade de parasitismo de Trichograma sp. (população de Piracicaba) e Trichograma pretiosum Riley, 1879 (populações de Iguatu e Goiânia) (Hym.: Trichogrammatidae), parasitóides de ovos de Alabama argilácea (Hübner, 1818) (Lep.: Noctuidae), criados no hospedeiro de substituição Anagasta Kuehniella (Zeiler, 1879) (Lep.: Pyralidae), na temperatura constante de 25°C. O número de ovos parasitados por fêmea foi 102,31 para insetos de Iguatu, 95,52 para os de Goiânia e 75,59 para os de Piracicaba. O modelo de regressão simples que melhor representou o parasitismo médio acumulado em função da longevidade para as três populações foi 1/y = a + b/x. Com base na razão finita de aumento (X) e na taxa líquida de reprodução (Ro), a população de Trichogramma de Iguatu foi superior às demais populaçõesThe fertility life table and parasitism of Trichogramma sp. (Piracicaba strain) and Trichogramma pretiosum Riley, 1879 (Iguana and Goiânia strains) (Hym.: Trichogrammatidae), egg parasitoid of Alabama argillacea (Hübner, 1818) (Lep.: Noctuidae), reared on Anagasta Kuehniella (Zeiler, 1879) (Lep.: Pyralidae) were studied at 25 ºC. The number of eggs parasitized per female was 102.31 for Iguana strain, 95.52 for Goiânia and 75.59 for Piracicaba ones. The linear regression model which best represented the mean accumulated parasitism in function of longevity for the three strains was 1/y = a + b/x. Based on the finite rate of increase (x) and on the net reproduction rate (Ro), the Iguatu strain was superior to the others

  • Espécies de Trichogramma parasitóides de Alabama argillacea I. Biologia de três populações
    Embrapa, 2014
    Co-Authors: Bleicher Ervino, Parra, José Roberto P.
    Abstract:

    The biology of Trichogramma sp. (Piracicaba strain) andTrichogramma pretiosum Riley, 1879 (Iguatu and Goiânia strains) (Hym.: Trichogrammatidae), egg parasitoid ofAlabama argillacea (Hubner, 1818) (Lep.: Noctuidae), reared on Anagasta kuehniella (Zeller, 1879) (Lep.: Pyralidae) was studied under five constant temperatures (18°C, 20°C, 25°C, 30°C and 32°C). The duration of the egg-adult period for the three strains was significantly affected by the temperature, being the growth velocity increased with thermal elevation. The same species (T. pretiosum) reacted in a different way at lower temperatures according to its origin. The viability in the egg-adult period (for the three swains) was not affected by the temperature. The number of parasitoides emerged from a single egg of A. kuehniella was affected by temperature for Iguatu and Goiânia strains, Sexual ratio was not affected by temperature, although T. pretiosum showed a different one the two geographic locations. Temperature increase determined longevity reduction for both ted and not fed insects. It was observed that ted insects always had a shorter period of life. Insects from Iguatu and Piracicaba, when fed, showed a greater longevity at 20°C. Estudaram-se as biologias de Trichogramma, Hymenoptera, Trichogrammatidae (população de Piracicaba) e Trichogramma pretiosum Riley, 1879 (populações de Iguatu e Goiânia) (Hym.: Trichogrammatidae), parasitoides de ovos de Alabama argillacea (Hubner, 1818) (Lep.: Noctuidae), criados no hospedeiro de substituição Anagasta kuehniella (Zeller, 1879) (Lep.: Pyralidae), em cinco temperaturas constantes (18°C, 20°C, 25°C, 30°C e 32°C). A duração do período ovo-adulto para as três populações foi afetada significativamente pela temperatura, sendo a velocidade de crescimento aumentada com a elevação térmica. A espécieT. pretiosum reagiu de forma diferente nas temperaturas baixas, conforme o local de origem. A viabilidade do período ovo-adulto (para as três populações) não foi afetada pela temperatura. Para populações de Iguatu e Goiânia, o número de parasitoides emergido por ovo de A. kuehniellafoi influenciado pela temperatura. A razão sexual não foi afetada pela temperatura, embora para T. pretiosum ela tenha sido diferente para as duas regiões geográficas. O aumento de temperatura determinou redução da longevidade, tanto para insetos alimentados quanto para os não alimentados, sendo que os sem alimentação sempre viveram menos. Os insetos provenientes de Iguatu e Piracicaba, quando alimentados, apresentaram uma maior longevidade de 20°C.

  • Bioecologia de Alabama argillacea I. Biologia em diferentes temperaturas, na cultivar de algodoeiro IAC-17
    Embrapa, 2014
    Co-Authors: Kasten Junior Peter, Parra, José Roberto P.
    Abstract:

    This research was carried out in order to study the biology of Alabama argillacea Hübner (1818) (Lepidoptera, Noctuidae) at constant temperatures of 20, 25, 30 and 35°C. This study was conducted in climatic chambers under relative humidity of 60 ± 10% and 14 hour photoperiod. Cotton-leaves of the cultivar IAC-17 were used as natural diet. A shortening of the larval period was observed as temperature increased from the 20 to 30°C. There was a variation between the number of instars of the cotton leafworm, and the temperature. There was no correlation between the number of instars and the size of the larvae. The pupal period decreased as temperature increased in the 20 - 30°C range. The optimum for oviposition ranged from 25 to 30°C and there was no oviposition at 20°C and 35°C. A complete life cycle was 26.88 and 17.83 days respectively at 25 - 30°C (optimum range for development). Regression equations for the different phases of the life cycle of the cotton leafworm in relation to temperature were determined.Estudou-se a biologia de Alabama argillacea Hübner (1818) (Lepidoptera, Noctuidae) em folhas de algodoeiro da cultivar IAC-17, utilizando-se câmaras climatizadas mantidas a 20, 25, 30 e 35°C, com umidade relativa de 60 ± 10% e fotófase de 14 horas. Observou-se que há um encurtamento do período larval com a elevação térmica, dentro da faixa de 20 a 30°C. O número de instares foi variável com a temperatura, mas não houve correlação entre ele e o comprimento das lagartas. Também a duração do período pupal decresceu com o aumento de temperatura, dentro da faixa de 20 - 30°C. A 20 e 35°C não ocorreram posturas, sendo que o ciclo total (ovo a adulto) foi de 26,88 e 17,83 dias respectivamente, quando o inseto foi mantido a 25 e 30°C (faixa favorável de desenvolvimento). Observou-se que, em função da elevação de temperatura, ocorreu um encurtamento do ciclo, dentro da faixa de 20 - 30°C. Foram determinadas equações de regressão simples para as diferentes fases do ciclo biológico do inseto, com relação à temperatura

Marcos Gino Fernandes - One of the best experts on this subject based on the ideXlab platform.

  • Spatial Distribution of Eggs of Alabama argillacea Hübner and Heliothis virescens Fabricius (Lepidoptera: Noctuidae) on Bt and non-Bt Cotton.
    Anais Da Academia Brasileira De Ciencias, 2015
    Co-Authors: Tatiana Rojas Rodrigues, Marcos Gino Fernandes, Paulo Eduardo Degrande, Thiago Alexandre Mota
    Abstract:

    Among the options to control Alabama argillacea (Hubner, 1818) and Heliothis virescens (Fabricius, 1781) on cotton, insecticide spraying and biological control have been extensively used. The GM'Bt' cotton has been introduced as an extremely viable alternative, but it is yet not known how transgenic plants affect populations of organisms that are interrelated in an agroecosystem. For this reason, it is important to know how the spatial arrangement of pests and beneficial insect are affected, which may call for changes in the methods used for sampling these species. This study was conducted with the goal to investigate the pattern of spatial distribution of eggs of A. argillacea and H. virescens in DeltaOpal™ (non-Bt) and DP90B™ Bt cotton cultivars. Data were collected during the agricultural year 2006/2007 in two areas of 5,000 m2, located in in the district of Nova America, Caarapo municipality. In each sampling area, comprising 100 plots of 50 m2, 15 evaluations were performed on two plants per plot. The sampling consisted in counting the eggs. The aggregation index (variance/mean ratio, Morisita index and exponent k of the negative binomial distribution) and chi-square fit of the observed and expected values to the theoretical frequency distribution (Poisson, Binomial and Negative Binomial Positive), showed that in both cultivars, the eggs of these species are distributed according to the aggregate distribution model, fitting the pattern of negative binomial distribution.

  • ASPECTOS FENOLÓGICOS DO ALGODOEIRO CULTIVAR CNPA ITA-90 CONDUZIDO SOB CONDIÇÕES DE MIP, E INFESTAÇÃO DE Alabama argillacea (HUBNER) (LEPIDOPTERA: NOCTUIDAE) EM MATO GROSSO DO SUL
    BRAZILIAN JOURNAL OF AGRICULTURE - Revista de Agricultura, 2015
    Co-Authors: Marcos Gino Fernandes, Anderson Luis L. Rodrigues, Paulo Eduardo Degrande, Antonio Carlos Busoli
    Abstract:

    ASPECTOS FENOLÓGICOS DO ALGODOEIRO CULTIVAR CNPA ITA-90 CONDUZIDO SOB CONDIÇÕES DE MIP, E INFESTAÇÃO DE Alabama argillacea (HUBNER) (LEPIDOPTERA: NOCTUIDAE) EM MATO GROSSO DO SUL

  • distribuicao vertical de lagartas de Alabama argillacea hubner lepidoptera noctuidae em plantas de algodao
    Manejo Integrado de Plagas y Agroecología, 2006
    Co-Authors: Marcos Gino Fernandes, Paulo Eduardo Degrande, Anderson Miguel Silva, Antonio Carlos Cubas
    Abstract:

    El conocimiento de la distribucion vertical de las orugas de Alabama argillacea (Hubner) en algodon es de extrema importancia para tornar mas eficientes los procesos del muestreo y control de este parasito. Para estudiar la distribucion vertical del parasito en las plantas del algodon, se llevo a cabo un experimento en una hacienda ubicada en Ponta Pora, MS, Brasil. El area experimental tenia un total de 116 ha de la cosecha bajo irrigacion a traves de pivote central. Se definieron tres campos de algodon de 10.000 m2, los cuales se dividieron en 100 diagramas de 100 m2 cada uno, plantados con la variedad de CNPA-ITA 90. Las muestras fueron recolectadas semanalmente durante todo el periodo de la ocurrencia del insecto. Los analisis de datos demostraron la preferencia de A. argillacea por el tercio superior de las plantas, independientemente del tamano de las orugas. Los gusanos clasificados como “grandes” fueron mas frecuentes en el tercio superior de las plantas que las orugas pequenas y medianas. Cerca del 85% de las orugas grandes fueron encontradas en el tercio superior de las plantas. Los gusanos de tamano mediano tambien fueron mas frecuentes en el tercio superior, puesto que menos del 30% de estos gusanos fueron observados en los tercios medios e inferiores de las plantas. Alrededor del 50% de las orugas pequenas se encontraron en los tercios superiores, mientras que en los tercios inferiores de las plantas se hallo cerca del 10% de estos gusanos.

  • aspectos fenologicos do algodoeiro cultivar cnpa ita 90 conduzido sob condicoes de mip e infestacao de Alabama argillacea hubner lepidoptera noctuidae em mato grosso do sul
    Revista de agricultura, 2005
    Co-Authors: Marcos Gino Fernandes, Anderson Luis L. Rodrigues, Paulo Eduardo Degrande, Antonio Carlos Busoli
    Abstract:

    The experiments were carried out on cotton crop in Dourados, Mato Grosso do Sul State in 1997-98 crop season. The objective of this research was to study some phenological characteristics of cotton Gossypium hirsutum L. cultivar CNPA ITA-90, conduced under Integrated Pest Management (IPM) conditions, and infestation of Alabama argillacea (Hubner, 1818) (Lepidoptera: Noctuidae) during the whole crop cycle as well. This was accomplished through register of square, bloom, boll and open boll numbers of 50 marked plants, during the whole crop period, on a weekly basis. Squares on set started 27 days after plant emergence (DAE). The first bloom was observed on crop at 52 DAE, and the first boll at 59 DAE. Squares and blooms were found on the crop until 109 DAE. At 129 DAE, when chemical defoliator was applied on the cotton crop, there were 10 bolls and 12,5 open bolls by plant on average. The cycle of cotton cultivar CNPA ITA-90 was 136 DAE. Eggs, larvae and pupae of A. argillacea had occurred on the crop from 31 DAE to 129 DAE, practically during the whole crop cycle.

  • influencia da pulverizacao aerea de inseticidas sobre o padrao de distribuicao espacial de Alabama argillacea hubner 1818 e spodoptera frugiperda j e smith 1797 em algodoeiro
    Arquivos do Instituto Biológico, 2003
    Co-Authors: Marcos Gino Fernandes, Antonio Carlos Busoli, Jose Carlos Barbosa, Wilson Itamar Maruyama, P E Degrande
    Abstract:

    The objective of the research was to determine the effect of the aerial insecticides spraying on the pattern of clumping distribution of the caterpillars Alabama argillacea (Hubner, 1818) and Spodoptera frugiperda (J.E. Smith, 1797) on the cotton crop. The cultivar used was CNPA-ITA 90, with aerial application in four different fields in the area of Ponta Pora’s area, MS, Brazil. The aerial application of insecticides did not alter significantly the pattern of aggregated distribution of the caterpillars of both species significantly, affecting more the population density of little and large larvae, but the population density of the medium larvae was low affected.

Bleicher Ervino - One of the best experts on this subject based on the ideXlab platform.

  • Species of Trichogramma parasitoid of Alabama argillacea. II. Determinaton of thermal requirement of three strains.
    Embrapa, 2014
    Co-Authors: Bleicher Ervino, Parra, Jpsé Roberto P.
    Abstract:

    Estudou-se a biologia de Trichogramma sp. (população de Piracicaba) e T. pretiosum Riley, 1879 (populações de Iguatu e Goiânia), parasitóides de ovos de Alabama argillacea, criados no hospedeiro de substituição Anagasta kuehniella em cinco temperaturas constantes (18, 20,25, 30 e 32 ºC), visando a determinar as exigências térmicas dos parasitóides. Aos tricogramatídeos dava-se a chance de parasitas os ovos do hospedeiro durante cinco horas. Estes ovos eram então acondicionados nas temperaturas pré-estabelecidas. Quando os ovos tornavam-se pretos (sinal de parasitismo), procedia-se à individualização com um total de 50 por temperatura. As observações eram feitas pela manhã e à noite, registrando-se a duração do período ovo-adulto. A determinação da temperatura-base e o valor da constante térmica foram feitas utilizando-se o método da hipérbole. Os valores da temperatura-base e constante térmica para o período ovo-adulto dos insetos de Piracicaba, Iguatu e Goiânia foram: 13,99ºC e 126,25 graus/dia (GD); 12,81 ºC e 133,25 GD e 11,98ºCe 131,95 GD,respectivamente. Tomando-se por base o ciclo total de A. argillacea, que apresenta uma constante térmica de 353,62 GD, verificou-se que para cada geração deste inseto obtiveram-se 2,65; 2,68 e 2,87 gerações de tricogramatídeos de Iguatu, Goiânia e Piracicaba, respectivamente.The biology of Trichogramma sp. (Piracicaba ,strain) and Trichogramma pretiosum Riley, 1879 (Iguatu and Goiânia strains) (Hym.: Trichogrammatidae), parasitoids of Alabama argillacea Hübner, 1818 (Lep.: Noctuidae), reared on Anagasta kuehniella (Zeiler, 1879) (Lep.: Pyralidae) was studied under five constant temperatures (18, 20, 25,30 and 32ºC) in order to determine thermal requirements of the parasitoid. A chance was given to the parasite to parasitise eggs for five hours. The eggs were then set at the preestablished temperatures. When the eggs turned black (sign of parasitism) they were individually isolated in 50 replicates par temperature. The observations were done early in the morning and at the end of the day recording the egg-adult period. The threshold temperature and thermal constant value were done by using the hyperbole method. The threshold temperature and thermal constant for insects from Piracicaba, Iguatu and Goiânia in the egg-adult period were: 13.99 ºC and 123.25 degrees/day; 12.81 ºC and 133.25 degrees/day and 11.89 ºC and 131.95 degrees/day, respectively. Taking in account the A. argillacea life cycle which has 353.62 degrees/day, it was found that for each generation of this insect, there would be 2.65, 2.68 and 2.8/generations of the parasitoid from Iguatu, Goiânia and Piracicaba, respectively

  • Espécies de Trichogramma parasitóides de Alabama argillacea I. Biologia de três populações
    Embrapa, 2014
    Co-Authors: Bleicher Ervino, Parra, José Roberto P.
    Abstract:

    The biology of Trichogramma sp. (Piracicaba strain) andTrichogramma pretiosum Riley, 1879 (Iguatu and Goiânia strains) (Hym.: Trichogrammatidae), egg parasitoid ofAlabama argillacea (Hubner, 1818) (Lep.: Noctuidae), reared on Anagasta kuehniella (Zeller, 1879) (Lep.: Pyralidae) was studied under five constant temperatures (18°C, 20°C, 25°C, 30°C and 32°C). The duration of the egg-adult period for the three strains was significantly affected by the temperature, being the growth velocity increased with thermal elevation. The same species (T. pretiosum) reacted in a different way at lower temperatures according to its origin. The viability in the egg-adult period (for the three swains) was not affected by the temperature. The number of parasitoides emerged from a single egg of A. kuehniella was affected by temperature for Iguatu and Goiânia strains, Sexual ratio was not affected by temperature, although T. pretiosum showed a different one the two geographic locations. Temperature increase determined longevity reduction for both ted and not fed insects. It was observed that ted insects always had a shorter period of life. Insects from Iguatu and Piracicaba, when fed, showed a greater longevity at 20°C. Estudaram-se as biologias de Trichogramma, Hymenoptera, Trichogrammatidae (população de Piracicaba) e Trichogramma pretiosum Riley, 1879 (populações de Iguatu e Goiânia) (Hym.: Trichogrammatidae), parasitoides de ovos de Alabama argillacea (Hubner, 1818) (Lep.: Noctuidae), criados no hospedeiro de substituição Anagasta kuehniella (Zeller, 1879) (Lep.: Pyralidae), em cinco temperaturas constantes (18°C, 20°C, 25°C, 30°C e 32°C). A duração do período ovo-adulto para as três populações foi afetada significativamente pela temperatura, sendo a velocidade de crescimento aumentada com a elevação térmica. A espécieT. pretiosum reagiu de forma diferente nas temperaturas baixas, conforme o local de origem. A viabilidade do período ovo-adulto (para as três populações) não foi afetada pela temperatura. Para populações de Iguatu e Goiânia, o número de parasitoides emergido por ovo de A. kuehniellafoi influenciado pela temperatura. A razão sexual não foi afetada pela temperatura, embora para T. pretiosum ela tenha sido diferente para as duas regiões geográficas. O aumento de temperatura determinou redução da longevidade, tanto para insetos alimentados quanto para os não alimentados, sendo que os sem alimentação sempre viveram menos. Os insetos provenientes de Iguatu e Piracicaba, quando alimentados, apresentaram uma maior longevidade de 20°C.

  • Species in Trichogramma parasitoid of Alabama argillacea. II. Fertility life table and parasitism of three strains of Trichogramma sp.
    Embrapa, 2014
    Co-Authors: Bleicher Ervino, Parra, José Roberto P.
    Abstract:

    Estudaram-se as tabelas de vida de fertilidade e capacidade de parasitismo de Trichograma sp. (população de Piracicaba) e Trichograma pretiosum Riley, 1879 (populações de Iguatu e Goiânia) (Hym.: Trichogrammatidae), parasitóides de ovos de Alabama argilácea (Hübner, 1818) (Lep.: Noctuidae), criados no hospedeiro de substituição Anagasta Kuehniella (Zeiler, 1879) (Lep.: Pyralidae), na temperatura constante de 25°C. O número de ovos parasitados por fêmea foi 102,31 para insetos de Iguatu, 95,52 para os de Goiânia e 75,59 para os de Piracicaba. O modelo de regressão simples que melhor representou o parasitismo médio acumulado em função da longevidade para as três populações foi 1/y = a + b/x. Com base na razão finita de aumento (X) e na taxa líquida de reprodução (Ro), a população de Trichogramma de Iguatu foi superior às demais populaçõesThe fertility life table and parasitism of Trichogramma sp. (Piracicaba strain) and Trichogramma pretiosum Riley, 1879 (Iguana and Goiânia strains) (Hym.: Trichogrammatidae), egg parasitoid of Alabama argillacea (Hübner, 1818) (Lep.: Noctuidae), reared on Anagasta Kuehniella (Zeiler, 1879) (Lep.: Pyralidae) were studied at 25 ºC. The number of eggs parasitized per female was 102.31 for Iguana strain, 95.52 for Goiânia and 75.59 for Piracicaba ones. The linear regression model which best represented the mean accumulated parasitism in function of longevity for the three strains was 1/y = a + b/x. Based on the finite rate of increase (x) and on the net reproduction rate (Ro), the Iguatu strain was superior to the others

Torres, Jorge Braz - One of the best experts on this subject based on the ideXlab platform.

  • Produção da toxina Cry1Ac e preferência para alimentação e oviposição de Alabama argillacea em algodão Bt sob estresse hídrico
    Embrapa, 2011
    Co-Authors: De Lima, Mauricio Silva, Torres, Jorge Braz
    Abstract:

    The objective of this work was to evaluate the production of Cry1Ac, a toxin of Bacillus thuringiensis (Bt), in genetically modified cotton plants (Bt cotton), and the feeding and oviposition preference of Alabama argillacea confined to Bt cotton and non Bt cotton under water stress. The varieties of Bt cotton – Acala 90B and NuOpal, and non Bt – Acala 90 and DeltaOpal – were cultivated in microplots, under stress and no stress conditions. Toxin production was evaluated in Bt cotton leaves and reproductive parts. For the oviposition choosing test, A. argillacea moths were released into a large screen cage which contained the four cotton varieties. After 72 hours, the number of eggs was quantified. For the feeding preference, 3‑day and 10‑day‑old larvae were evaluated. The production of Cry1Ac toxin was higher in leaves of the plant apical part of the two varieties under water stress, and it was similar in the bracts and boll husks. Moths and caterpillars of A. agillacea do not distinguish between Bt and non Bt cotton for feeding and oviposition choosing, respectively. However, moths show preference for ovipositing on plants under no water stress.O objetivo deste trabalho foi avaliar a produção da toxina Cry1Ac de Bacillus thuringiensis (Bt) em plantas de algodão geneticamente modificado (algodão Bt), e a preferência para alimentação e oviposição de Alabama argillacea confinada em algodão Bt e não Bt sob estresse hídrico. As variedades de algodão Bt – Acala 90B e NuOpal – e não Bt – Acala 90 e DeltaOpal – foram cultivadas em microparcelas, com e sem estresse hídrico. A produção de toxina foi avaliada em folhas e partes reprodutivas das variedades de algodão Bt. Para o teste de escolha para oviposição, mariposas de A. argillacea foram liberadas em telado que continha as quatro variedades do algodão. Após 72 horas, o número de ovos foi quantificado. Para a preferência de alimentação, foram avaliadas lagartas com três e 10 dias de idade. A produção da toxina Cry1Ac foi superior nas folhas da parte apical das plantas, das duas variedades sob estresse hídrico, e similar nas brácteas e cascas de maçãs. Lagartas e mariposas de A. argillacea não diferenciam algodão Bt e não Bt na escolha quanto à alimentação e à oviposição, respectivamente. Entretanto, as mariposas preferem ovipositar em plantas sem estresse hídrico

  • Produção da toxina Cry1Ac e preferência para alimentação e oviposição de Alabama argillacea em algodão Bt sob estresse hídrico
    Pesquisa Agropecuária Brasileira, 2011
    Co-Authors: Mauricio Silva De Lima, Torres, Jorge Braz
    Abstract:

    O objetivo deste trabalho foi avaliar a produção da toxina Cry1Ac de Bacillus thuringiensis (Bt) em plantas de algodão geneticamente modificado (algodão Bt), e a preferência para alimentação e oviposição de Alabama argillacea confinada em algodão Bt e não Bt sob estresse hídrico. As variedades de algodão Bt - Acala 90B e NuOpal - e não Bt - Acala 90 e DeltaOpal - foram cultivadas em microparcelas, com e sem estresse hídrico. A produção de toxina foi avaliada em folhas e partes reprodutivas das variedades de algodão Bt. Para o teste de escolha para oviposição, mariposas de A. argillacea foram liberadas em telado que continha as quatro variedades do algodão. Após 72 horas, o número de ovos foi quantificado. Para a preferência de alimentação, foram avaliadas lagartas com três e 10 dias de idade. A produção da toxina Cry1Ac foi superior nas folhas da parte apical das plantas, das duas variedades sob estresse hídrico, e similar nas brácteas e cascas de maçãs. Lagartas e mariposas de A. argillacea não diferenciam algodão Bt e não Bt na escolha quanto à alimentação e à oviposição, respectivamente. Entretanto, as mariposas preferem ovipositar em plantas sem estresse hídrico

  • Development and population growth of Alabama argillacea on cotton of white and colored fibers
    2011
    Co-Authors: Santos, Roberta Leme Dos, Torres, Jorge Braz, Bastos, Cristina Schetino
    Abstract:

    O objetivo deste trabalho foi avaliar o desenvolvimento e a reprodução do curuquerê-do-algodoeiro [Alabama argillacea (Hübner)], em cultivares de algodoeiro de fibras branca (BRS 201 e Acala 90) e verde (BRS Verde). O experimento consistiu de três tratamentos (cultivares), com dez repetições em laboratório e oito em campo, em delineamento inteiramente casualizado. Em laboratório, as lagartas do curuquerê foram alimentadas com folhas das cultivares, enquanto no campo, as posturas foram confinadas sobre as plantas e monitoradas até completar a geração. A cultivar BRS 201 ocasionou: prolongamento da fase larval de dois dias, em comparação às outras cultivares, em laboratório e no campo; menor sobrevivência da fase larval, em laboratório; menor peso de pupas e produção de ovos, em laboratório e campo. O crescimento populacional do curuquerê-do-algodoeiro, estimado após quatro gerações sucessivas, mostrou que uma fêmea fertilizada tem capacidade de produzir 1.776,6, 47,19 e 6,51 indivíduos em Acala 90, BRS Verde e BRS 201, respectivamente. O menor desempenho no desenvolvimento e na reprodução do curuquerê, criado na cultivar BRS 201, é importante no controle desta praga no campo. ___________________________________________________________________________________ ABSTRACTThe aim of this work was to evaluate the developmental rates and reproductive output of the cotton leafworm [Alabama argillacea (Hübner)], fed on leaves of cultivars with white fibers (BRS 201 and Acala 90) and colored ones (BRS Verde). The experiment was conducted in a completely randomized design, with three treatments (cultivars) and ten and eight replications in laboratory and in field, respectively. In the laboratory, larvae were fed with cotton leaves, while in the field, eggs were caged on plant terminals and monitored until one generation was completed. Compared to the other cultivars, BRS 201 caused, both in laboratory and in the field: prolongation of larval development of A. argillacea in about two days; and lower pupal weight and egg production. In laboratory, the cotton leafworm reared on BRS 201 showed the lower survival index (46%). Population growth of A. argillacea estimated after four successive generations showed that one fertilized female has the potential for producing 1,776.6, 47.19 and 6.51 individuals colonizing Acala 90, BRS Verde and BRS 201, respectively. Lower performance in development and reproduction of cotton leafworm fed on BRS 201 can offer additional control to this pest in the field

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

  • susceptibility of Alabama argillacea and chrysodeixis includens lepidoptera noctuidae larvae to beauveria bassiana associated with kaolin
    Brazilian Journal of Biology, 2020
    Co-Authors: J S Galdino, José Cola Zanuncio, C A D Silva, M A Castellani
    Abstract:

    The mortality of the Alabama argillacea and Chrysodeixis includens (Lepidoptera: Noctuidae) larvae caused by the kaolin inert powder and the entomopathogenic fungus Beauveria bassiana were determined under laboratory conditions. Using the caterpillar submersion method, the CG 138 B. bassiana isolate was more pathogenic to A. argillacea than the CG 70, GC 82, ESALQ 634, and ESALQ 645. All five tested isolates caused similar mortality of C. includens. The mortality of first-instar larvae of A. argillacea and C. includens by feeding on leaf-disc impregnated with B. bassiana (CG 138) and kaolin was also determined. Higher A. argillacea mortalities were observed in the B. bassiana (CG 138) treatments, regardless of the presence of kaolin. However, the activity of kaolin + B. bassiana (CG 138) against C. includens was higher than each ingredient alone, indicating an additive action against C. includes larvae. The mortality of A. argillacea and C. includens larvae treated with kaolin + B. bassiana (CG 138) was similar, and the A. argillacea mortality was higher than that of C. includens with kaolin and B. bassiana (GC 138) separated. The treatment kaolin + B. bassiana (CG 138) is promising for the simultaneous management of these two defoliator pests, mainly A. includes. In addition, the monophagous A. argillacea is more susceptible to both kaolin and B. bassiana (GC 138) than the polyphagous C. includens, suggesting that the nutritional ecology plays an important role in the susceptibility of these defoliator species to alternative insecticides.

  • Effects of temperature on the feeding behavior of Alabama argillacea (Hübner) (Lepidoptera: Noctuidae) on Bt and non-Bt cotton plants
    Anais Da Academia Brasileira De Ciencias, 2017
    Co-Authors: Francisco S. Ramalho, José Cola Zanuncio, Aline C S Lira, José B. Malaquias, Jéssica K. S. Pachú, Bárbara Davis Dos Santos Brito, Francisco S. Fernandes
    Abstract:

    The host acceptance behavior and environmental factors as temperature affect the feeding behavior of Lepidoptera pests. Thus, they must be considered in studies about the risk potential of resistance evolution. The current study sets the differences in the feeding behavior of neonate Alabama argillacea (Hubner) (Lepidoptera: Noctuidae) larvae exposed to Bt and non-Bt cotton plants, under different temperatures and time gap after hatching. Two cotton cultivars were used: the Bt (DP 404 BG - bollgard) and the non-transformed isoline, DP 4049. We found that the feeding behavior of neonate A. argillacea is significantly different between Bt and non-Bt cotton. Based on the number of larvae with vegetal tissue in their gut found on the plant and in the organza as well as on the amount of vegetal tissue ingested by the larvae. A. argillacea shows feeding preference for non-Bt cotton plants, in comparison to that on the Bt. However, factors such as temperature and exposure time may affect detection capacity and plant abandonment by the larvae and it results in lower ingestion of vegetal tissue. Such results are relevant to handle the resistance of Bt cotton cultivars to A. argillacea and they also enable determining how the cotton seeds mix will be a feasible handling option to hold back resistance evolution in A. argillacea populations on Bt cotton, when it is compared to other refuge strategies. The results can also be useful to determine which refuge distribution of plants is more effective for handling Bt cotton resistance to A. argillacea.

  • How predation by Podisus nigrispinus is influenced by developmental stage and density of its prey Alabama argillacea
    Entomologia Experimentalis Et Applicata, 2016
    Co-Authors: Bárbara D.b. Santos, Francisco S. Ramalho, Aline C S Lira, Francisco S. Fernandes, José B. Malaquias, Jéssica K. S. Pachú, José Cola Zanuncio
    Abstract:

    The functional response of a predator to the density of its prey is affected by several factors, including the prey?s developmental stage. This study evaluated the functional response of Podisus nigrispinus (Dallas) (Hemiptera: Heteroptera: Pentatomidae) females to fourth instars and pupae of Alabama argillacea (H?ubner) (Lepidoptera: Noctuidae), an important pest of cotton (Gossypium hirsutum L., Malvaceae) in Brazil. The prey were exposed to the predator for 12 and 24 h, and in densities of 1, 6, 12, 18, 24, and 30 items per predator female. The predation data were subjected to polynomial regression logistic analysis to determine the type of functional response. Holling and Rogers? equations were used to estimate parameters such as attack rate and handling time. Podisus nigrispinus females showed functional response types II and III by preying on larvae and pupae, respectively. The attack rate and handling time did not differ between the 12 and 24 h exposure times. Predation rate was higher at higher larval and pupal densities; predation was highest at a density of 30 prey items per female, and it was similar at 18 and 24 prey per predator. Understanding the interaction of predators and their food resources helps to optimize biological control strategies. It also helps the decisionmaking and the improvement of release techniques of P. nigrispinus in the field.

  • Feeding and dispersal behavior of the cotton leafworm, Alabama argillacea (Hübner) (Lepidoptera: Noctuidae), on Bt and non-Bt cotton: implications for evolution and resistance management.
    PLOS ONE, 2014
    Co-Authors: Francisco S. Ramalho, José Cola Zanuncio, Aline C S Lira, José B. Malaquias, Jéssica K. S. Pachú, Francisco S. Fernandes
    Abstract:

    The host acceptance of neonate Alabama argillacea (Hubner) (Lepidoptera: Noctuidae) larvae to Bt cotton plants exerts a strong influence on the potential risk that this pest will develop resistance to Bt cotton. This will also determine the efficiency of management strategies to prevent its resistance such as the “refuge-in-the-bag” strategy. In this study, we assessed the acceptance of neonate A. argillacea larvae to Bt and non-Bt cotton plants at different temperatures during the first 24 h after hatching. Two cotton cultivars were used in the study, one a Bt DP 404 BG (Bollgard) cultivar, and the other, an untransformed isoline, DP 4049 cultivar. There was a greater acceptance by live neonate A. argillacea larvae for the non-Bt cotton plants compared with the Bt cotton plants, especially in the time interval between 18 and 24 h. The percentages of neonate A. argillacea larvae found on Bt or non-Bt plants were lower when exposed to temperatures of 31 and 34°C. The low acceptance of A. argillacea larvae for Bt cotton plants at high temperatures stimulated the dispersion of A. argillacea larvae. Our results support the hypothesis that the dispersion and/or feeding behavior of neonate A. argillacea larvae is different between Bt and non-Bt cotton. The presence of the Cry1Ac toxin in Bt cotton plants, and its probable detection by the A. argillacea larvae tasting or eating it, increases the probability of dispersion from the plant where the larvae began. These findings may help to understand how the A. argillacea larvae detect the Cry1Ac toxin in Bt cotton and how the toxin affects the dispersion behavior of the larvae over time. Therefore, our results are extremely important for the management of resistance in populations of A. argillacea on Bt cotton.

  • Food extraction by the males of Podisus nigrispinus (Dallas) (Hemiptera: Pentatomidae) from cotton leafworm larvae
    Brazilian Archives of Biology and Technology, 2010
    Co-Authors: Alexandre Igor De Azevedo Pereira, Francisco De Sousa Ramalho, José B. Malaquias, K. C. V. Rodrigues, J. V. S. Souza, José Cola Zanuncio
    Abstract:

    In this work, the effect of different densities (1, 3, 5, 7 and 9) of 3rd instar Alabama argillacea (Huebner) larvae on food consumption by Podisus nigrispinus (Dallas) males was evaluated. The densities established were converted to weight of prey offered: 13.4 mg (one larva), 33.3 mg (three larvae), 54.3 mg (five larvae), 81.8 mg (seven larvae), and 110.34 mg (nine larvae). The quantity of food consumed by P. nigrispinus increased with the prey density. The density of preys did not affect the time spent by the predator to ingest the food. The quantity of food extracted per minute was always higher in smaller densities and lower in higher densities. Males mean body weight did not differ statistically between the treatments tested, and weight gain was smaller in the first two densities tested. Relative consumption rates increased with the quantity of larvae offered. P. nigrispinus males might change its predatory behavior as a function of the quantity of prey available.