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目的:通过对玄参田小地老虎Agrotis ypsilon的为害调查及药剂防治研究,为综合防治提供依据。方法:田间调查和药剂防治试验。结果:玄参田的小地老虎发生及危害程度与前茬作物有关,以前茬为烟草和玉米的受害严重,平均受害率分别达到12.43%,15.68%。药剂防治试验结果表明10%高效氯氰菊酯乳油2 000倍液,40%毒死蜱乳油1 500倍液防治效果较好,防效分别是92.53%,91.69%。结论:在玄参苗期喷施10%高效氯氰菊酯乳油或40%毒死蜱乳油能有效防治小地老虎的为害。
OBJECTIVE: To investigate the damage of Agrotis ypsilon and the prevention and cure of Agrotis ypsilon in Xuansen field so as to provide basis for comprehensive prevention and treatment. Methods: Field investigation and drug control test. Results: The occurrence and harm degree of the small tiger tiger in Xuansen field were related to the former crop. The former crop suffered serious damage to tobacco and maize, the average victimization rate reached 12.43% and 15.68% respectively. The results showed that the control effect of 10% beta-cypermethrin 2 000 times and 40% chlorpyrifos 1 500 times were good, the control effects were 92.53% and 91.69% respectively. Conclusion: The spraying of 10% beta-cypermethrin or 40% chlorpyrifos in the figwort seedling stage can effectively control the damage of the small tiger.