No impact of Bt soybean that express Cry1Ac protein on biological traits of Euschistus heros (Hemiptera, Pentatomidae) and its egg parasitoid Telenomus podisi (Hymenoptera, Platygastridae)

Silva, Gabriela Vieira; Pasini, Amarildo; Bueno, Adeney de Freitas; Bortolotto, Orcial Ceolin; Barbosa, Gustavo Caselato; Cruz, Y. K. S. da

doi:10.1590/s0085-56262014000300010

Cited by 10 publications

(11 citation statements)

References 36 publications

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“…Soybean ( Glycine max (L.) Merrill) is an oilseed plant of the family Fabaceae that is widely planted in various countries worldwide [ 1 ]. Argentina is the third-major soybean producer in the world, covering an area of 19.2 million hectares [ 2 , 3 ].…”

Section: Introductionmentioning

confidence: 99%

Defoliation of Soybean Expressing Cry1Ac by Lepidopteran Pests

Murúa

Vera

Herrero

et al. 2018

Insects

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Lepidoptera, stink bugs, and weevils are important pests in soybean. For lepidopteran control, insecticides and seed treatments are used. As an alternative, Bt soybean was developed to control primary pests of Lepidoptera such as Rachiplusia nu (Guenée) (Noctuidae), Chrysodeixis includens (Walker) (Noctuidae), Anticarsia gemmatalis Hübner (Erebidae), Helicoverpa gelotopoeon (Dyar) (Noctuidae), and Crocidosema aporema (Walsingham) (Tortricidae). However, the use of transgenic plants, and the resulting reduction of insecticide against target pests, may allow other pest species to become more prevalent in agricultural environments. Soybean expressing Cry1Ac against different lepidopteran nontarget and target insect pests was evaluated, and its performance was compared with non-Bt soybean with seed treatment. The treatments were Bt soybean, non-Bt soybean with seed treatment (Fortenza® diamide insecticide, Syngenta, Buenos Aires, Argentina), and non-Bt soybean without seed treatment. Larvae of H. gelotopoeon, Spodoptera albula (Walker) (Noctuidae), Spodoptera cosmiodes (Walker) (Noctuidae), Spodoptera eridania (Stoll) (Noctuidae), and Spodoptera frugiperda (J. E. Smith) (Lep.: Noctuidae) were used. The plants of each treatment were infested with larvae of each species, and the percentage of leaf damage produced by each species was recorded. The results showed that Bt soybean provided control of H. gelotopoeon and had a suppressive effect on S. frugiperda and S. albula. However, S. eridania and S. cosmiodes were not susceptible to the Cry1Ac protein in MON 87701 × MON 89788 soybean when evaluated by greenhouse infestation. Considering the performance of each species using non-Bt soybean without seed treatment, S. eridania would represent a potential risk in soybean crops.

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Section: Introductionmentioning

confidence: 99%

Defoliation of Soybean Expressing Cry1Ac by Lepidopteran Pests

Murúa

Vera

Herrero

et al. 2018

Insects

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“…Soybean expressing the Cry1Ac protein does not affect the development time or the survival of the nymphal stages of Euschistus heros (F.) (Hemiptera: Pentatomidae), or weight, pronotum size, sex ratio, and fecundity of adults, and egg viability. Telenomus podisi Ashmead (Hymenoptera: Scelionidae), an E. heros egg parasitoid, did not show any differences in ability to parasitize hosts, egg-to-adult period, sex ratio, and longevity when reared on E. heros fed Bt soybean as compared with T. podisi reared on E. heros fed non-Bt soybean (Silva et al 2014).…”

Section: Discussionmentioning

confidence: 99%

“…Several studies have been carried out with non-target species including predators, pollinators, and parasitoids to demonstrate the possible effects of the Bacillus thuringiensis (Bt) toxin expressed in genetically modified maize on these organisms (Silva et al 2014;Tian et al 2014). To complement these studies, our objective was to evaluate the effect of Bt maize pollen on selected biological characteristics of T. pretiosum, which feeds as an adult on maize pollen.…”

Section: Introductionmentioning

confidence: 99%

Biology ofTrichogramma pretiosum(Hymenoptera: Trichogrammatidae) Fed Transgenic Maize Pollen

Sousa

Fernandes

Mota

2017

Florida Entomologist

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Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae) is an important natural egg parasitoids of pest insects in the agricultural environment, being used as a form of biological control, and it may be affected by the Bacillus thuringiensis (Bt) toxin present in transgenic plants widely used in Brazil. The aim of this study was to evaluate the effect of Bt maize pollen fed to adults of the parasitoid T. pretiosum Riley (Hymenoptera: Trichogrammatidae) reared in the eggs of the alternate host Ephestia kuehniella Zeller (Lepidoptera: Pyralidae). Three treatments (diets) were compared: pollen from Bt maize, pollen from non-Bt maize, and 10% honey solution (control). Each treatment consisted of 50 T. pretiosum females that were freshly emerged and mated (between 24 and 36 h old). Biological characteristics indicative of the efficiency of T. pretiosum as a biological control agent were evaluated for 4 generations. The results suggest that the consumption of pollen did not affect the evaluated biological characteristics, such as percentage of parasitism, sex ratio, and number of individuals reared per host egg, in any of 4 generations. Thus, we showed that Bt maize is compatible with the use of T. pretiosum for biological control.

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“…Silva et al (2014) suggested that there was no direct effect of Bt soybean (Cry1Ac) on the biological traits of Euchistos heros or its egg parasitoid Telenomus podisi. According to Bortolloto et al (2014), it is important to emphasize that based on the mode of action of the Bt protein (gut-active), it is unlikely that the Cry1Ac, found in the Bt soybean, would be transferred from S. eridania larvae to adults to eggs.…”

Section: Natural Enemiesmentioning

confidence: 99%

Genetically modified soybean expressing insecticidal protein (Cry1Ac): Management risk and perspectives

Martins-Salles

Machado

Massochin-Pinto

et al. 2017

FACETS

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A Bt soybean has been recently developed, thus, efficiently regulating the populations of major lepidopteran pests. However, in other cases, these benefits have been reduced or lost because of the rapid evolution of pest resistance to the Bt toxins in transgenic crops. When pest populations are exposed to Bt crops and to refuges (non-Bt plants), the evolution of resistance is governed by the fitness of resistant individuals relative to susceptible individuals for both the presence and absence of Bt toxins. One major ecological concern regarding the biosafety of Bt crops on the environment is their potential effects on non-target organisms, especially predators and parasitoids that play an important role in pest control. This information is important for supporting insect resistance management (IRM) programs and for improving agricultural practices in a crop production system with Bt plants. Before the use of Bt plants for insect pest control in Brazil is adopted, IRM programs should be established to ensure the sustainability of this technology for integrated pest management (IPM). This review presents data on Bt soybean and lepidopteran pests as well as on the importance of natural enemies as a form of biological control, and applications for IPM and IRM.

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No impact of Bt soybean that express Cry1Ac protein on biological traits of Euschistus heros (Hemiptera, Pentatomidae) and its egg parasitoid Telenomus podisi (Hymenoptera, Platygastridae)

Cited by 10 publications

References 36 publications

Defoliation of Soybean Expressing Cry1Ac by Lepidopteran Pests

Defoliation of Soybean Expressing Cry1Ac by Lepidopteran Pests

Biology ofTrichogramma pretiosum(Hymenoptera: Trichogrammatidae) Fed Transgenic Maize Pollen

Genetically modified soybean expressing insecticidal protein (Cry1Ac): Management risk and perspectives

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