Author(s)

Alvin M. Simmons^1*, Shaaban Abd-Rabou², Mohammed Hindy³

¹U.S. Vegetable Laboratory, United States Department of Agriculture (USDA), Agricultural Research Service, Charleston, SC, USA.
²Whiteflies Unit, Scale Insects and Mealybugs Department, Egyptian Ministry of Agriculture and Land Reclamation, Agricultural Research Center, Plant Protection Research Institute, Giza, Egypt.
³Spray Technology Research Department, Egyptian Ministry of Agriculture and Land Reclamation, Agricultural Research Center, Plant Protection Research Institute, Giza, Egypt.

Whiteflies cause problems in vegetable production on a global scale. The primary worldwide whitefly pest is Bemisia tabaci (Gennadius). Insecticides are commonly used to mitigate the whitefly problem in vegetable crops. In limited-resource crop production, operator-carried spray applicators are commonly used for pesticide treatments. Three single-nozzle operator-carried spray applicators were assessed for their efficacies for whitefly (B. tabaci) control on summer squash (Cucurbita pepo L.) in Egypt. Each knapsack spray equipment was evaluated with five biorational and conventional insecticides. Counts of whitefly nymphs (first, second, third and fourth instars) on leaf samples were taken on 3, 9, 15 and 21 days after treatments with the insecticides. Nymphal mortality varied about 10% among the three spray equipment treatments. The Economy Micro Ulva sprayer resulted in significantly more nymphal mortality as compared with the Arimitsu sprayer and the CZP-3 sprayer, respectively. All insecticides greatly suppressed the whitefly populations; mean mortality ranged from 73% to 95% for all nymphs combined by day for a given treatment. These results provide pest management practitioners with performance assessment of the three operator-carried pesticide applicators for whitefly management with selected foliar insecticides.

Bemisia tabaci, Vegetable, Portable Pesticide Applicator, Pest Management, Limited-Resource Producer

Simmons, A. , Abd-Rabou, S. and Hindy, M. (2015) Comparison of Three Single-Nozzle Operator-Carried Spray Applicators for Whitefly (Bemisia tabaci) Management on Squash. Agricultural Sciences, 6, 1381-1386. doi: 10.4236/as.2015.611133.