2009•Anhui nongye kexueRequires access
Study on the Controlling Efficiency of Several Pesticides to Citrus Aphid
Qing Zhang
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Abstract
[Objective] The scientific basis of citrus production was provided through the study on the controlling efficiency of several pesticides on citrus aphid.[Method] In the period of wingless aphid-damaging,the pesticides: abamectin, osthol,beta-cypermethrin and abamectin + imidacloprid(1∶ 2) with three kinds of doses and the imidacloprid with the dose of 25 mg/k and water be taken as the CK,were sprayed.And the effect of these pesticides on citrus aphids was analyzed.[Results] Among five kinds of pesticides,the avermectin,beta-cypermethrin, abamectin + imidacloprid and imidacloprid had very good control effect on citrus aphids(close to or over 95%).The treatment efficacy of biology pesticide-osthole with low and medium dose was low(44.14% and 69.74%) after 1 day's spraying. The control effect of high-dose treatment on the aphids began to rise from the 3rd day of its spraying and reached to 94.76% after the 10th day's treatment and 98.87% after the 14th day's treatment.5 kinds of pesticides had a very good effect-holding and the controlling efficiency of all pesticides was over 95% after two weeks of treatment.[Conclusion] The experimental result provided a reference for citrus aphid controlling and the effective replacement of highly toxic pesticide.