The effect of thioredoxin-gene-expressed transgenic soybean on associated non-target insects and arachnids

Amin, Md Ruhul; Oh, Sung‐Dug; Park, Soo-Yun; Ha, Kihun; Kang, Shingu; Park, Jung Ho; Kim, Minwook; Eun, Chang Uk; Kim, Young Kun; Suh, Sang Jae

doi:10.1007/s11816-021-00724-y

Cited by 4 publications

(4 citation statements)

References 23 publications

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“…Plot size in non-target arthropod studies varies considerably [ 3 ]. For example, studies involving non-target species in arable crops used plots ranging from 11,800 to 16,900 m 2 in corn [ 37 ], and some recent studies used plots of 12 m 2 in soybeans [ 38 ], 21 m 2 in quinoa [ 39 ] and 170 and 500 m 2 in cotton [ 40 , 41 ]. In meta-analyses to examine the non-target impacts of transgenic Bt crops, Wolfenbarger et al [ 42 ] found no pattern in effect sizes between Bt and non-Bt crops over plot sizes ranging from 20–175,000 m 2 .…”

Section: Discussionmentioning

confidence: 99%

Spatial scale of non-target effects of cotton insecticides

et al. 2023

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Plot size is of practical importance in any integrated pest management (IPM) study that has a field component. Such studies need to be conducted at a scale relevant to species dynamics because their abundance and distribution in plots might vary according to plot size. An adequate plot size is especially important for researchers, technology providers and regulatory agencies in understanding effects of various insect control technologies on non-target arthropods. Plots that are too small might fail to detect potential harmful effects of these technologies due to arthropod movement and redistribution among plots, or from untreated areas and outside sources. The Arizona cotton system is heavily dependent on technologies for arthropod control, thus we conducted a 2-year replicated field experiment to estimate the optimal plot size for non-target arthropod studies in our system. Experimental treatments consisted of three square plot sizes and three insecticides in a full factorial. We established three plot sizes that measured 144 m2, 324 m2 and 576 m2. For insecticide treatments, we established an untreated check, a positive control insecticide with known negative effects on the arthropod community and a selective insecticide. We investigated how plot size impacts the estimation of treatment effects relative to community structure (27 taxa), community diversity, individual abundance, effect sizes, biological control function of arthropod taxa with a wide range of mobility, including Collops spp., Orius tristicolor, Geocoris spp., Misumenops celer, Drapetis nr. divergens and Chrysoperla carnea s.l.. Square 144 m2 plots supported similar results for all parameters compared with larger plots, and are thus sufficiently large to measure insecticidal effects on non-target arthropods in cotton. Our results are applicable to cotton systems with related pests, predators or other fauna with similar dispersal characteristics. Moreover, these results also might be generalizable to other crop systems with similar fauna.

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Section: Discussionmentioning

confidence: 99%

Spatial scale of non-target effects of cotton insecticides

et al. 2023

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“…Plot size in non-target arthropod studies vary considerably (Macfadyen et al, 2014). For example, studies involving non-target species in arable crops used plots of 11,800 and 16,900 m 2 in corn (Candolfi et al, 2004), and some recent studies used plots of 12 m 2 in soybeans (Amin et al, 2022), 21 m 2 in quinoa (Cruces et al, 2021) and 170 and 500 m 2 in cotton (Marques et al, 2021; Kaur et al, 2021). In meta-analyses to examine the non-target impacts of transgenic Bt crops, Wolfenbarger et al (2008) found no pattern in effect sizes between Bt and non-Bt crops over plot sizes ranging from 20 – 175,000 m 2 .…”

Section: Discussionmentioning

confidence: 99%

Spatial Scale of Non-Target Effects of Cotton Insecticides

Bordini

Naranjo

Fournier

et al. 2022

Preprint

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Plot size is of practical importance in any integrated pest management (IPM) study that has a field component. Such studies need to be conducted at a scale relevant to species dynamics because their abundance and distribution in plots might vary according to plot size. An adequate plot size is especially important for researchers, technology providers and regulatory agencies in understanding effects of various insect control technologies on non-target arthropods. Plots that are too small might fail to detect potential harmful effects of these technologies due to arthropod movement and redistribution among plots, or from untreated areas and outside sources. The Arizona cotton system is heavily dependent on technologies for arthropod control, thus we conducted a 2-year replicated field experiment to estimate the optimal plot size for non-target arthropod studies in our system. Experimental treatments consisted of plot sizes and insecticides in a full factorial. We established three plot sizes that measured 144 m2, 324 m2 and 576 m2. For insecticides, we established an untreated check, a positive control insecticide with known negative effects on the arthropod community and a selective insecticide. We investigated how plot size impacts the estimation of treatment effects relative to community structure (27 taxa), community diversity, individual abundance, effect sizes, biological control function and success of arthropod taxa with a wide range of mobility, including Collops spp., Orius tristicolor, Geocoris spp., Misumenops celer, Drapetis nr. divergens and Chrysoperla carnea. The 144 m2 plots supported similar results for all parameters compared to larger plots, thus being sufficiently large to measure insecticidal effects on non-target arthropods in Arizona cotton. Though results might be system-specific, they point to a scale of testing that should be considered when developing any IPM guidelines, especially for systems that share a similar fauna of predators and pests.

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“…The findings corresponded to the results of the research where the effect of thioredoxin-gene-expressed transgenic soybean in comparison to non-GM soybean on associated insects and arachnids was examined, and an increase of insect populations over the period from 2016 to 2017 was marked irrespective of the genotypes of the crop. 9 …”

Section: Discussionmentioning

confidence: 99%

“…According to research reports, GM soybean IGF and TRX did not affect arthropod diversity over non-GM soybean. 8 , 9 Several other studies investigated the safety of the non-target arthropod populations in the presence of transgenic Bt proteins in cotton, maize and soybean, and reported their negligible short-term impact on them. 10–12 …”

Section: Introductionmentioning

confidence: 99%

Influence of Genetically Modified Soybean Expressing Epidermal Growth Factor on Arthropod Biodiversity

Amin

Afrose

et al. 2022

GM Crops & Food

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The field study was undertaken to examine the potential for adverse effects of transgenic soybean expressing bioactive human epidermal growth factor (with tolerance to the herbicide glufosinate, PPT) on the abundance and diversity of plant‐dwelling arthropods by comparing with those of a non‐GM parental cultivar, Gwangan soybean. Field surveys of soybean fields were carried out over two consecutive years, 2016 and 2017 at Ochang and Jeonju, Korea. The number of captured individuals associated with either of EGF and Gwangan soybean plants increased in 2017 compared with 2016 in both Ochang and Jeonju. During the survey period, the diversity and richness of the occurred insects and arachnids increased, dominance decreased, and the evenness of the insects remained static. The insects of Hymenoptera Order occurred most often comprised 25.4% of total captured insect pests. On the contrary, natural enemy from Hymenoptera Order and other insects from Diptera Order occurred more frequently (29.9% and 19.0%, respectively) in both the survey regions during the study periods. The score from PROXSCAL multidimensional scaling using combined data showed that the occurrence of insects and arachnids were separated due to their cultivation regions and years, irrespective of soybean cultivars. Consequently, the results indicated that there happened no notable change in the composition of arthropod communities in soybean agroecosystem due to GM event in soybean expressing EGF.

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The effect of thioredoxin-gene-expressed transgenic soybean on associated non-target insects and arachnids

Cited by 4 publications

References 23 publications

Spatial scale of non-target effects of cotton insecticides

Spatial scale of non-target effects of cotton insecticides

Spatial Scale of Non-Target Effects of Cotton Insecticides

Influence of Genetically Modified Soybean Expressing Epidermal Growth Factor on Arthropod Biodiversity

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