Abstract
Population fluctuation of major insect pests on kidney bean and the proper time of control.
Abstract
In central Taiwan, sprays of bifenthrin 2.8% EC (at 2000× dilution), cyhalothrin 2.8% EC (2000×) or naled 25% EC (1000×) within 10-15 days of germination satisfactorily controlled the agromyzids Melanagromyza centrosematis [Ophiomyia centrosematis] and M. sojae, the cicadellid Edwardsiana flaresens [E. flavescens] and the aphid Aphis craccivora on young kidney bean plants [Phaseolus vulgaris]. During the flowering and pod-forming stages, Liriomyza bryoniae, Tetranychus urticae, Frankliniella intonsa, E. flavescens and some Lepidoptera are major pests of foliage, flower buds and pods, with dense populations on the autumn crops. These were controlled effectively by 2 consecutive sprays of bifenthrin, cyhalothrin, deltamethrin 2.8% EC (1000×), Bacillus thuringiensis 3% WP (1500×), malathion 50% EC (500×) or copermethrin [? cyromazine] 75% WP (4000×) before flowering and pod formation.
