【摘要】 生物农药防治板栗红蜘蛛的关键时期为越冬卵孵化盛末期。泰安地区一般在4月中下旬至5月上旬,准确的防治时期可以通过观察板栗红蜘蛛越冬卵的孵化进度加以确定。在盛末期喷施5%噻螨酮EC33mg/L比在麦收前后防治效果提高了8.8%,平均失绿指数降低。1.8%阿维菌素EC3￣3.6mg/L、20%吡虫啉EC66.7￣100mg/L防治板栗红蜘蛛效果较好。更多还原

【Abstract】 The end of the peak egg hatch is the key time for biopesticide control of overwintering spider mites inchestnuts. In the Tai’an area, this period generally occurs from the final 10 days of April to the first 10 days of Maybut can be determined accurately by observing the progress of overwintering egg hatch on chestnut trees. A sprayapplication of nexythiazox 5% EC at 33 mg/L during the end of peak egg hatch provided 8.8% higher control and areduced chlorosis index compared to an application timed close to wheat harvest according to local custom. Abamectin1.8% EC at 3-3.6 mg/L and imidacloprid 20% EC at 100-66.7 mg/L both provided good spider mite control.更多还原