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Findings from Syngenta Broaden Understanding of Entomology [Baseline Susceptibility and Monitoring of Brazilian Populations of Spodoptera frugiperda...

July 15, 2014



Findings from Syngenta Broaden Understanding of Entomology [Baseline Susceptibility and Monitoring of Brazilian Populations of Spodoptera frugiperda (Lepidoptera: Noctuidae) and Diatraea saccharalis (Lepidoptera: Crambidae) to Vip3Aa20 ...]

By a News Reporter-Staff News Editor at Life Science Weekly -- Researchers detail new data in Life Science Research. According to news reporting originating from Greensboro, North Carolina, by NewsRx correspondents, research stated, "The genetically modified maize expressing Vip3Aa20 insecticidal protein from Bacillus thuringiensis Berliner is a biotechnological option for the control of Spodoptera frugiperda (J.E. Smith) and Diatraea saccharalis (F.) in Brazil."

Our news editors obtained a quote from the research from Syngenta, "To support an Insect Resistance Management program, we conducted studies of baseline susceptibility and monitoring of Brazilian populations of S. frugiperda and D. saccharalis to the Vip3Aa20 insecticidal protein. Neonates were exposed to Vip3Aa20 applied on artificial diet surface. Mortality and growth inhibition were assessed after 7 d. All populations were susceptible to Vip3Aa20. The LC50 ranged from 92.38 to 611.65 ng Vip3Aa20/cm(2) for 16 populations of S. frugiperda (6.6-fold variation), and between 61.18 and 367.86 ng Vip3Aa20/cm(2) for 6 populations of D. saccharalis (sixfold variation). The EC50 ranged from 21.76 to 70.09 and 48.65 to 163.60 ng Vip3Aa20/cm(2) for S. frugiperda and D. saccharalis, respectively. There was a low interpopulation variation in susceptibility to Vip3Aa20, which represents the natural geographic variation in the response, and not the variation caused by previous exposure to selection pressure. For these two pests, the diagnostic concentrations of 2,000 and 3,600 ng of Vip3Aa20/cm(2) caused high mortality."

According to the news editors, the research concluded: "These diagnostic concentrations will be used in resistance monitoring programs in Brazil."

For more information on this research see: Baseline Susceptibility and Monitoring of Brazilian Populations of Spodoptera frugiperda (Lepidoptera: Noctuidae) and Diatraea saccharalis (Lepidoptera: Crambidae) to Vip3Aa20 Insecticidal Protein. Journal of Economic Entomology, 2014;107(2):781-790. Journal of Economic Entomology can be contacted at: Entomological Soc Amer, 3 Park Place, Ste 307, Annapolis, MD 21401-3722, USA (see also Life Science Research).

The news editors report that additional information may be obtained by contacting O. Bernardi, Syngenta Crop Protect, Greensboro, NC 27419, United States. Additional authors for this research include D. Amado, R.S. Sousa, F. Segatti, J. Fatoretto, A.D. Burd and C. Omoto.

Keywords for this news article include: Greensboro, United States, North Carolina, Life Science Research, North and Central America

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Life Science Weekly


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