Experiment of Three Insecticides for Controlling Aphids in Apricot Field

Neonicotinoid and triazine ketones insecticides were selected to carry out the effective test against Hyalopterus arundinis to clarify the control effect,optimal concentration and persistence.[Methods] DMRT method was used to analyze variance and Duncan-style with new multiple range to test the significance of differences.[Results] Acetamiprid 5% EC 16.7,25 mg a.i./L and imidacloprid 5% EC 16.7,25 mg a.i./L showed good control against Hyalopterus arundinis.After 21 days control effect reached 99.78-100%,obviously higher than pymetrozine 50% WG 166.7,250 mg a.i./L.There is no evident difference of corrective effect between acetamiprid 5% EC 16.7,25 mg a.i./L and imidacloprid 5% EC 16.7,25 mg a.i./L.[Conclusions] In practical application,acetamiprid 5% EC 16.7 mg a.i./L and imidacloprid 5% EC 16.7 mg a.i./L should be used alternately to prevent development of pest resistance.