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22 March 2022 Impact of Bemisia tabaci MEAM1 (Hemiptera: Aleyrodidae) on Soybean Yield and Quality Under Field Conditions
Inana X Schutze, Steve E. Naranjo, Pedro T Yamamoto
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Bemisia tabaci MEAM1 (Hemiptera: Aleyrodidae) is a key insect pest in soybean fields in Brazil but data are lacking on the relationship between pest abundance and crop yield and quality. Controlled infestation studies were conducted on caged soybean plants in the field over a two year period at two sites in Brazil. Differences in temperature in the two years affected population growth of B. tabaci, reaching 413 nymphs per leaflet in the first year, and 179 the second year even when the average temperature was 3°C higher. Higher temperatures promoted a shorter lifecycle and nearly one more generation. Yield was affected with losses up to 500 kg/ha in 2017/2018 and 1,147 kg/ha in 2018/2019. A decrease in the weight of a thousand grains of 18 and 33 g was observed in the first and second year, respectively. No significant differences were observed in grain germination, but estimated losses in protein content were up to 440 kg/ha at the highest infestation level. Pest density and yield data were used to estimate economic injury levels (EILs). EILs ranged from 2.5 to 25.67 nymphs per leaflet and 0.17–1.79 adults per leaflet over a range of control costs, soybean production values, and control efficacies. These results should provide data useful toward development of pest management decision making tools.

© The Author(s) 2022. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For permissions, please e-mail:
Inana X Schutze, Steve E. Naranjo, and Pedro T Yamamoto "Impact of Bemisia tabaci MEAM1 (Hemiptera: Aleyrodidae) on Soybean Yield and Quality Under Field Conditions," Journal of Economic Entomology 115(3), 757-766, (22 March 2022).
Received: 6 October 2021; Accepted: 10 February 2022; Published: 22 March 2022

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