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[Objective]The paper was to investigate the control effect of imidacloprid against Dendrobium officinale aphid. [Method]The control effects of 70%imidacloprid WP 4 000,5 000 and 6 000 times dilution and 10% imidacloprid 750 times dilution on D. officinale aphid were studied,respectively. [Result]70%Imidacloprid WP had quick and durable control effects on D. officinale aphid,and the control effect improved with the increasing concentration. The control efficacy at 7 d post secondary administration was up to 95. 4%-97. 8%. [Conclusion]70% Imidacloprid WP is safe to crops within the test dosage,and can be used for prevention and control of D. officinale aphid.
[Objective] The paper was to investigate the control effect of imidacloprid against Dendrobium officinale aphid. [Method] The control effects of 70% imidacloprid WP 4 000, 5 000 and 6 000 times dilution and 10% imidacloprid 750 times dilution on D. officinale [Result] 70% Imidacloprid WP had quick and durable control effects on D. officinale aphid, and the control effect improved with the increasing concentration. The control efficacy at 7 d post secondary administration was up to 95. 4 % -97. 8%. [Conclusion] 70% Imidacloprid WP is safe to crops within the test dosage, and can be used for prevention and control of D. officinale aphid.