Kidney bean leaf discs (approximately 35 mm in diameter) were used as substrates for oviposition. Ten mated females (2- to 3-day-old) were transferred on the ventral side of a bean leaf disc placed on cotton soaked in water in a Petri dish (60 mm diameter) and given a 24-h period in which to lay eggs. After 24 h, the adults were removed, and the eggs were counted. The leaf discs with eggs were treated with the selected pesticide (1/8-, 1/4-, 1/2-, 1-, 2-, and 4 times the recommended concentration) suspension using a sprayer and were then dried in the dark for 30 min. The recommended concentration of each pesticide was only used to treat the field-collected populations. Control groups were sprayed with distilled water only. All leaf discs were examined daily for 7 days. The numbers of hatched and unhatched eggs were recorded. The dishes were incubated at 25–27 °C under 40–60% relative humidity and a 16 L:8 D photoperiod. All experiments were replicated three times.

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