【摘要】 针对所谓抗性棉铃虫防治不易问题,通过观察、试验发现与喷药防治时间选择有关。提出在傍晚露水下来后喷药最佳,比中午高温时喷药及日落后喷药防效分别提高87%及75.9%。更多还原

【Abstract】 In an attempt to better control the resistant cotton bollworm, the behaviro of Helicoverpa armgera Hübner larvae was studied. The result showed that the control effect was related to the spraying time. It was best to spray at dusk when it began to dew, which would improve the control effect 87% and 75.9% than at noon and at sunset, respectively.更多还原