Effect of Bt maize on the reproduction and development of saprophagous Diptera over multiple generations

Knecht, Simon; Nentwig, Wolfgang

doi:10.1016/j.baae.2010.02.010

Cited by 19 publications

(25 citation statements)

References 15 publications

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“…Insects have varying susceptibilities to the different Cry protoxins (Liao et al 2002;Avilla et al 2005;Zhang et al 2007;Sauka et al 2007). For example, Cry1Ab proteins expressed in the GM crop varieties only affect the species of Lepidoptera (Romeis et al 2013), whereas Cry3 proteins selectively resist Phytophagous coleoptera, particularly the Western Maize rootworm (Knecht and Nentwig 2010;Chen and Lin 2013), and Cry1Ca is the most active Bt protoxin against both the striped stem borer and the pink stem borer; however, Cry1Ba, Cry1Aa and Cry1Ac have relatively low or marginal toxicity against both stem borers (Gao et al 2010).…”

Section: Introductionmentioning

confidence: 99%

A 90-day subchronic feeding study of genetically modified rice expressing Cry1Ab protein in Sprague–Dawley rats

Song

Zou

et al. 2014

Transgenic Res

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Bacillus thuringiensis (Bt) transgenic rice line (mfb-MH86) expressing a synthetic cry1Ab gene can be protected against feeding damage from Lepidopteran insects, including Sesamia inferens, Chilo suppressalis, Tryporyza incertulas and Cnaphalocrocis medinalis. Rice flour from mfb-MH86 and its near-isogenic control MH86 was separately formulated into rodent diets at concentrations of 17.5, 35 and 70 % (w/w) for a 90-day feeding test with rats, and all of the diets were nutritionally balanced. In this study, the responses of rats fed diets containing mfb-MH86 were compared to those of rats fed flour from MH86. Overall health, body weight and food consumption were comparable between groups fed diets containing mfb-MH86 and MH86. Blood samples were collected prior to sacrifice and a few significant differences (p \ 0.05) were observed in haematological and biochemical parameters between rats fed genetically modified (GM) and non-GM diets. However, the values of these parameters were within the normal ranges of values for rats of this age and sex, thus not considered treatment related. In addition, upon sacrifice a large number of organs were weighed, macroscopic and histopathological examinations were performed with only minor changes to report. In conclusion, these results demonstrated that no toxic effect was observed in the conditions of the experiment, based on the different parameters assessed. GM rice mfb-MH86 is as safe and nutritious as non-GM rice.

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Section: Introductionmentioning

confidence: 99%

A 90-day subchronic feeding study of genetically modified rice expressing Cry1Ab protein in Sprague–Dawley rats

Song

Zou

et al. 2014

Transgenic Res

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“…García et al. () found toxin in the spider mites, and Knecht and Nentwig () in Diptera larvae, common preys of various ground‐dwelling predators. Some ground beetles may be impacted by Cry toxins through the prey and also through direct consumption of the maize or its residues (Zwahlen et al.…”

Section: Introductionmentioning

confidence: 99%

Communities of ground‐dwelling arthropods in conventional and transgenic maize: background data for the post‐market environmental monitoring

Habuštová

Svobodová

Spitzer

et al. 2014

J Applied Entomology

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To verify the validity of concerns about environmental safety of maize expressing insecticidal Cry toxins (referred to as Bt maize), we compared communities of ground beetles (Carabidae), rove beetles (Staphylinidae) and spiders (Araneae) in plots planted either with Bt maize cultivar YieldGard® or with the non‐transgenic parental cultivar Monumental. Each cultivar was grown on 5 plots of 0.5 ha for three consecutive years. To increase the field load of Cry toxin, the fully grown maize of the first study year was shredded to small pieces that were ploughed into the soil. Arthropods were collected in pitfall traps and determined to the species level. The abundance and species richness of all studied groups greatly varied over the season and between the seasons but without statistically significant differences between the Bt and non‐Bt plots. A single spider species and three ground beetle species dominated in the catches every year, whereas a set of 1–4 most abundant rove beetle species changed every year. Frequently occurring species were typical for most of Europe. The total counts of ground beetles, rove beetles and spiders collected once or twice per season are proposed to serve as bioindicators in the post‐market environmental monitoring (PMEM).

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“…2009; Garcia et al. 2010; Knecht and Nentwig 2010) whereas relatively little research has been conducted on fungicidal GM wheat. Potential effects of fungicidal GM wheat have been investigated so far for Collembola (Romeis et al.…”

Section: Introductionmentioning

confidence: 99%

“…It is therefore essential to investigate the potential effects of transgenic plants on decomposer guilds to ensure ecosystem functioning. Studies on soil organisms under Bt crops often indicated no significant negative impact (Weber and Nentwig 2006;Alvarez-Alfageme et al 2009;Higgins et al 2009;Garcia et al 2010;Knecht and Nentwig 2010) whereas relatively little research has been conducted on fungicidal GM wheat. Potential effects of fungicidal GM wheat have been investigated so far for Collembola (Romeis et al 2003), detritophagous Diptera larvae (Peter et al 2010) and annelid worms (Lindfeld et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Food preference in the woodlouse Porcellio scaber (Isopoda) in a choice test with fungicidal GM wheat

Bigler

Nentwig

Lindfeld

2011

J Applied Entomology

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Two independent food choice experiments were conducted in the laboratory to study the effects of four transgenic and five non‐GM fungicidal wheat varieties on the food selection behaviour of the woodlouse Porcellio scaber. In general, woodlice did not avoid GM wheat as a food source and we detected no adverse effects of GM wheat on the non‐target P. scaber. Moreover, we found a food preference of the woodlouse for one of the four GM varieties, Pm3b1, but not for the closely related GM Pm3b2 or for their non‐GM isolines. We assume either a pleiotropic effect like lower lignin content or more suitable leaf litter coverage by microorganisms that may cause this preference and thus increasing palatability or digestibility. We discuss that this effect is ecologically not relevant.

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Effect of Bt maize on the reproduction and development of saprophagous Diptera over multiple generations

Cited by 19 publications

References 15 publications

A 90-day subchronic feeding study of genetically modified rice expressing Cry1Ab protein in Sprague–Dawley rats

A 90-day subchronic feeding study of genetically modified rice expressing Cry1Ab protein in Sprague–Dawley rats

Communities of ground‐dwelling arthropods in conventional and transgenic maize: background data for the post‐market environmental monitoring

Food preference in the woodlouse Porcellio scaber (Isopoda) in a choice test with fungicidal GM wheat

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