Monitoring Onion Thrips (Thysanoptera: Thripidae) Susceptibility to Spinetoram in New York Onion Fields

Journal of Economic Entomology
Erica A MorettiBrian A Nault

Abstract

Onion thrips (Thrips tabaci Lindeman) is a severe pest of onion (Allium cepa L.). Their management relies on frequent applications of foliar insecticides, including spinetoram (Radiant® SC), which has a novel mode of action and is effective at controlling large populations. However, despite being widely used for the past 10 yr, susceptibility to spinetoram has not been evaluated formally in New York state, where nearly 3,000 hectares of onion are planted annually. Over 2 yr (2017-2018), the susceptibility of onion thrips to spinetoram was assessed from populations collected in commercial onion fields in New York. LC50s for adults were generated from feeding assays and ranged from 2.07 to 5.08 ppm, but grower reports indicate that onion thrips populations continue to be susceptible to spinetoram. Moreover, both regional and temporal variations in susceptibility were similar among these populations based on survival at individual concentrations tested, despite significant differences in LC50s. These results suggest some genetic heterogeneity among onion thrips populations and serve as a valuable reference for the continued monitoring of onion thrips susceptibility to spinetoram, contributing to ongoing efforts to manage insectici...Continue Reading

References

May 14, 2003·Pest Management Science·Alfredo Rueda, Anthony M Shelton
May 25, 2005·Pest Management Science·Jennifer K MacIntyre AllenC Ron Harris
Mar 18, 2008·Journal of Computer-aided Molecular Design·Thomas C SparksJames Gifford
Mar 17, 2011·Journal of Economic Entomology·John Diaz-MontanoAnthony M Shelton
May 13, 2011·Ecology·David I Warton, Francis K C Hui
Jun 6, 2015·Pesticide Biochemistry and Physiology·Thomas C Sparks, Ralf Nauen
Dec 1, 2006·Plant Disease·David H GentHoward F Schwartz
Aug 1, 2001·Plant Disease·A KritzmanA Gera

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Citations

May 4, 2020·Pesticide Biochemistry and Physiology·Adekunle W AdesanyaFang Zhu
Jul 22, 2021·Journal of Economic Entomology·Isabella M YannuzziBrian A Nault

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