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Infestation by Bemisia tabaci (Hemiptera: Aleyrodidae) and incidence of whitefly-transmitted viruses after the application of four biorational insecticides in some crops in Egypt

Published online by Cambridge University Press:  27 July 2015

Shaaban Abd-Rabou  and
Alvin M. Simmons
Shaaban Abd-Rabou
Affiliation:
Ministry of Agriculture, Agricultural Research Centre, Plant Protection Research Institute, Dokki, Giza, Egypt
Alvin M. Simmons*
Affiliation:
US Vegetable Laboratory, US Department of Agriculture (USDA), Agricultural Research Service, 2700 Savannah Hwy, Charleston, SC 29414, USA
*
*E-mail: alvin.simmons@ars.usda.gov
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Abstract

Bemisia tabaci (Gennadius) is a global insect pest that transmits many important plant viruses. A field study was conducted on infestation by B. tabaci and incidence of whitefly-transmitted viruses after the application of selected foliar and seed-treated biorational insecticides in seven vegetable and row crops in Egypt. Three foliar insecticides (Actara, Biofly and Neemix) and a treated check (Actellic) were assayed across three weeks on seedlings and mature plants, and two seed-treated insecticides (Actara and Gaucho) and a treated check (Aldicarb) were assayed on seedlings. All of the foliar insecticides led to 60–100% reductions in whitefly infestations in each crop. Biofly and Neemix were the least efficacious insecticides. Incidences of whitefly-transmitted viruses were reduced in each insecticide-treated plot with seedlings of four crops; however, no effect on virus incidence was observed in the experiment with mature plants. Crops of cucumber, eggplant, squash and tomato displayed symptoms characteristic of Cucumber vein yellowing virus, Squash leaf curl virus or Tomato yellow leaf curl virus; however, no symptoms of whitefly-transmitted viruses were observed in green bean, potato or sugar beet. The results show that several biorational insecticides may suppress whitefly populations in seedlings to delay whitefly-transmitted viruses in some vegetable crops in Egypt.

Keywords

biopesticidecrop protectioninsecticideintegrated pest managementsweetpotato whiteflyvegetablevirus infection
Type
Short Communication
Information
International Journal of Tropical Insect Science , Volume 35 , Issue 3 , September 2015 , pp. 132 - 136
Copyright
Copyright © ICIPE 2015 

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