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Zahra Abedi - One of the best experts on this subject based on the ideXlab platform.
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feeding performance and life table parameters of khapra beetle trogoderma granarium everts coleoptera dermestidae on various barley Cultivars
Bulletin of Entomological Research, 2017Co-Authors: Ali Golizadeh, Zahra AbediAbstract:The Khapra beetle, Trogoderma granarium Everts (Coleoptera: Dermestidae), is a common pest of cereal grains and other stored products. In this study, the effects of ten barley Cultivars (Abidar, Bahman, Line20, Line22, Line30, Lisuei, Lokht11, Makuyi, Sahand, and Sahraa) were evaluated on life table parameters and nutritional indices of T. granarium under the following laboratory conditions: 33 ± 1°C, 60 ± 5% RH, and a photoperiod of 14: 10 (L: D) h. Life history parameters of T. granarium could be appropriate indices in resistance and susceptibility evaluation of barley Cultivars. The maximum survival rate of immature stages was observed on Makuyi and Lisuei Cultivars and the minimum rate was on Abidar and Line22 Cultivars. The shortest development time was on Makuyi Cultivar and the longest on Line22 Cultivar. Pupal weight was ranged from 2.56 mg on Lokht11 to 4.86 mg on Makuyi. Fecundity and egg-hatching rates were highest on Lisuei Cultivar and the adults were long-lived on Makuyi Cultivar. The highest r m values were observed on Makuyi and Lisuei Cultivars but lower value of it resulted from rearing of T. granarium on Line22 Cultivar (0.0350 female per female day −1 ). The results showed that T. granarium larvae fed on Makuyi Cultivar had higher values of relative consumption rate and relative growth rate. The results indicated that Makuyi and Lisuei Cultivars were relatively susceptible barley Cultivars and Line22 was the most inappropriate Cultivar for feeding of T. granarium , which could prove useful in the development of Integrated Pest Management programs for this pest.
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comparative performance of the khapra beetle trogoderma granarium everts coleoptera dermestidae on various wheat Cultivars
Journal of Stored Products Research, 2016Co-Authors: Ali Golizadeh, Zahra AbediAbstract:Abstract The Khapra beetle, Trogoderma granarium Everts (Coleoptera: Dermestidae), is known as a serious pest of stored grains and stored products. Host plant is an effective ecological factor on performance of an insect pest. In this study, effects of ten wheat Cultivars were evaluated on life table parameters and nutritional indices of T. granarium under laboratory conditions, 33 ± 1 °C, 60 ± 5% RH and a photoperiod of 14: 10 (L: D) h. Our research showed that various wheat Cultivars have significant effects on life history, demographical parameters and nutritional indices of T. granarium . The highest immature survival rate was observed on Cultivar Gaskojen. Significant differences on developmental time, adult fecundity and longevity of T. granarium were found across tested wheat Cultivars. In addition, there were significant differences among the wheat Cultivars for population growth parameters of T. granarium . The highest ( r m ) values were observed on Gaskojen (0.078 eggs/female/day) and its lower values were resulted from rearing of T. granarium on Kouhdasht and Bezostaya. The larvae fed on Gaskojen showed the higher value of food consumption as compared with others. In addition, the higher value of relative growth rate (RGR) was found on Cultivar Gaskojen, while the relative lower value was observed on Cultivar Kouhdasht. The results indicated that Gaskojen Cultivar was a relatively susceptible wheat Cultivar and Kouhdasht Cultivar was relatively unsuitable host for feeding of T. granarium which could prove useful in the development of IPM programs for this pest.
Ali Golizadeh - One of the best experts on this subject based on the ideXlab platform.
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feeding performance and life table parameters of khapra beetle trogoderma granarium everts coleoptera dermestidae on various barley Cultivars
Bulletin of Entomological Research, 2017Co-Authors: Ali Golizadeh, Zahra AbediAbstract:The Khapra beetle, Trogoderma granarium Everts (Coleoptera: Dermestidae), is a common pest of cereal grains and other stored products. In this study, the effects of ten barley Cultivars (Abidar, Bahman, Line20, Line22, Line30, Lisuei, Lokht11, Makuyi, Sahand, and Sahraa) were evaluated on life table parameters and nutritional indices of T. granarium under the following laboratory conditions: 33 ± 1°C, 60 ± 5% RH, and a photoperiod of 14: 10 (L: D) h. Life history parameters of T. granarium could be appropriate indices in resistance and susceptibility evaluation of barley Cultivars. The maximum survival rate of immature stages was observed on Makuyi and Lisuei Cultivars and the minimum rate was on Abidar and Line22 Cultivars. The shortest development time was on Makuyi Cultivar and the longest on Line22 Cultivar. Pupal weight was ranged from 2.56 mg on Lokht11 to 4.86 mg on Makuyi. Fecundity and egg-hatching rates were highest on Lisuei Cultivar and the adults were long-lived on Makuyi Cultivar. The highest r m values were observed on Makuyi and Lisuei Cultivars but lower value of it resulted from rearing of T. granarium on Line22 Cultivar (0.0350 female per female day −1 ). The results showed that T. granarium larvae fed on Makuyi Cultivar had higher values of relative consumption rate and relative growth rate. The results indicated that Makuyi and Lisuei Cultivars were relatively susceptible barley Cultivars and Line22 was the most inappropriate Cultivar for feeding of T. granarium , which could prove useful in the development of Integrated Pest Management programs for this pest.
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comparative performance of the khapra beetle trogoderma granarium everts coleoptera dermestidae on various wheat Cultivars
Journal of Stored Products Research, 2016Co-Authors: Ali Golizadeh, Zahra AbediAbstract:Abstract The Khapra beetle, Trogoderma granarium Everts (Coleoptera: Dermestidae), is known as a serious pest of stored grains and stored products. Host plant is an effective ecological factor on performance of an insect pest. In this study, effects of ten wheat Cultivars were evaluated on life table parameters and nutritional indices of T. granarium under laboratory conditions, 33 ± 1 °C, 60 ± 5% RH and a photoperiod of 14: 10 (L: D) h. Our research showed that various wheat Cultivars have significant effects on life history, demographical parameters and nutritional indices of T. granarium . The highest immature survival rate was observed on Cultivar Gaskojen. Significant differences on developmental time, adult fecundity and longevity of T. granarium were found across tested wheat Cultivars. In addition, there were significant differences among the wheat Cultivars for population growth parameters of T. granarium . The highest ( r m ) values were observed on Gaskojen (0.078 eggs/female/day) and its lower values were resulted from rearing of T. granarium on Kouhdasht and Bezostaya. The larvae fed on Gaskojen showed the higher value of food consumption as compared with others. In addition, the higher value of relative growth rate (RGR) was found on Cultivar Gaskojen, while the relative lower value was observed on Cultivar Kouhdasht. The results indicated that Gaskojen Cultivar was a relatively susceptible wheat Cultivar and Kouhdasht Cultivar was relatively unsuitable host for feeding of T. granarium which could prove useful in the development of IPM programs for this pest.
Jean Marc Meynard - One of the best experts on this subject based on the ideXlab platform.
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Diagnosis of limiting factors of organic oilseed rape yield. A survey of farmers' fields
Agronomy for Sustainable Development, 2008Co-Authors: Muriel Morison, Jean Marc MeynardAbstract:The use of winter wheat (Triticum aestivum L.) Cultivars resistant to diseases may make it possible to reduce yield losses without the need to use fungicides, which are expensive and may damage the environment. The Cultivar resistances favored depend on the region considered and the nature of the most widespread diseases in that region. We have constructed a statistical linear model for the estimation of relative yield loss due to diseases, making it possible to assess the effects of winter wheat Cultivars in various disease conditions. We considered the interactions “potential disease intensity × winter wheat Cultivar” for four main fungal diseases : septoria tritici blotch (Mycosphaerella graminicola), brown rust (Puccinia triticina), yellow rust (Puccinia striiformis) and powdery mildew (Erysiphe graminis). This model can therefore be readily adapted to different regions with diverse combinations of these diseases. The potential intensity of each disease in each trial was calculated based on the symptoms observed on susceptible Cultivars not treated with fungicide. The Cultivar effect was characterized by the ratings of Cultivar susceptibility to each disease and by Cultivar earliness. The parameters of the model were estimated from 276 wheat Cultivar trials carried out over 12 years (1991–2002) in the major wheat-growing areas of France. This model can help to choose from the Cultivars resistant to several diseases (but very rarely resistant to all the diseases), those Cultivars best adapted to a given environment, according to the hierarchy of potential disease intensities encountered.
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Modeling the effect of Cultivar resistance on yield losses of winter wheat in natural multiple disease conditions
European Journal of Agronomy, 2007Co-Authors: Xiaoyu Zhang, Chantal Loyce, Jean Marc Meynard, Herve MonodAbstract:The use of winter wheat (Triticum aestivum L.) Cultivars resistant to diseases may make it possible to reduce yield losses without the need to use fungicides, which are expensive and may damage the environment. The Cultivar resistances favored depend on the region considered and the nature of the most widespread diseases in that region. We have constructed a statistical linear model for the estimation of relative yield loss due to diseases, making it possible to assess the effects of winter wheat Cultivars in various disease conditions. We considered the interactions “potential disease intensity × winter wheat Cultivar” for four main fungal diseases: septoria tritici blotch (Mycosphaerella graminicola), brown rust (Puccinia triticina), yellow rust (Puccinia striiformis) and powdery mildew (Erysiphe graminis). This model can therefore be readily adapted to different regions with diverse combinations of these diseases. The potential intensity of each disease in each trial was calculated based on the symptoms observed on susceptible Cultivars not treated with fungicide. The Cultivar effect was characterized by the ratings of Cultivar susceptibility to each disease and by Cultivar earliness. The parameters of the model were estimated from 276 wheat Cultivar trials carried out over 12 years (1991–2002) in the major wheat-growing areas of France. This model can help to choose from the Cultivars resistant to several diseases (but very rarely resistant to all the diseases), those Cultivars best adapted to a given environment, according to the hierarchy of potential disease intensities encountered
Herve Monod - One of the best experts on this subject based on the ideXlab platform.
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Modeling the effect of Cultivar resistance on yield losses of winter wheat in natural multiple disease conditions
European Journal of Agronomy, 2007Co-Authors: Xiaoyu Zhang, Chantal Loyce, Jean Marc Meynard, Herve MonodAbstract:The use of winter wheat (Triticum aestivum L.) Cultivars resistant to diseases may make it possible to reduce yield losses without the need to use fungicides, which are expensive and may damage the environment. The Cultivar resistances favored depend on the region considered and the nature of the most widespread diseases in that region. We have constructed a statistical linear model for the estimation of relative yield loss due to diseases, making it possible to assess the effects of winter wheat Cultivars in various disease conditions. We considered the interactions “potential disease intensity × winter wheat Cultivar” for four main fungal diseases: septoria tritici blotch (Mycosphaerella graminicola), brown rust (Puccinia triticina), yellow rust (Puccinia striiformis) and powdery mildew (Erysiphe graminis). This model can therefore be readily adapted to different regions with diverse combinations of these diseases. The potential intensity of each disease in each trial was calculated based on the symptoms observed on susceptible Cultivars not treated with fungicide. The Cultivar effect was characterized by the ratings of Cultivar susceptibility to each disease and by Cultivar earliness. The parameters of the model were estimated from 276 wheat Cultivar trials carried out over 12 years (1991–2002) in the major wheat-growing areas of France. This model can help to choose from the Cultivars resistant to several diseases (but very rarely resistant to all the diseases), those Cultivars best adapted to a given environment, according to the hierarchy of potential disease intensities encountered
Gustavo A Slafer - One of the best experts on this subject based on the ideXlab platform.
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nitrogen economy in old and modern malting barleys
Field Crops Research, 2008Co-Authors: Gabriela L Abeledo, D F Calderini, Gustavo A SlaferAbstract:Abstract Nitrogen (N) uptake at heading and at maturity was evaluated under four N treatments (20, 50, 110 and 160 kgN ha−1 at sowing) in four malting barley Cultivars released to the market from 1944 to 1998 in Argentina. Grain N concentration was slightly lower in the newest Cultivar than in the oldest one. Grain N yield showed Cultivar × N interaction: modern Cultivars tended to increase their grain N yield in response to N fertilization more than old Cultivars. Grain N yield was correlated to grain yield as well as to total above-ground biomass. Nitrogen fertilization affected total N in above-ground biomass at maturity, but no differences among Cultivars were found. Nitrogen harvest index of the most modern Cultivar (0.76) was higher than that of the oldest Cultivar (0.67). Modern Cultivars tended to have a higher N content in ears at heading than old Cultivars, and the magnitude of the differences increased with N availability. Physiological nitrogen efficiency for grain yield was significantly higher in the newest than in the oldest Cultivar (57 and 43 g grain g N − 1 , respectively).
