女贞球象在丽水的生活史及农药防治试验

he study of indoor rearing and field observation indicate that Stereonychus angulicollis had 1 generation an year in Lishui ,its overwintered as eggs on leaves or as adults in litter or between branches and leaves.The larvae hatch in first and middle of February, pupate in late February early March.The adults emerge in late March early April, and its over summer between early May to middle September.The adults resume feeding in late September, and lay eggs in late December.The results of feeding reaction at different temperatures in a biochemical incubator showed that the adults could feed at 6 ℃, but not at 34 ℃.Laboratory pesticide control tests showed that chlorpyrifos 40% EC had a good control effect on adults; abamectin 1.8% EC had the best control effect on larvae, followed by bisultap 18% water agent and emamectin benzoate 5.7% crystal.