玄参田小地老虎的为害及防治研究

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.

Damage and control of Agrotis ypsilon on Scrophularia ningpoensis

Objective: To study the damage of Agrotis ypsilon on Scrophularia ningpoensis and control method of pesticide so as to provide scientific basis for its integrated pests management (IPM). Method: The field investigation and the field controlling trial were carried out for the research. Result: There is obvious relationship between the Pre-season crops and the damage degree of figwort. The damage rate of the fields which planted maize and tobacco in the last planting season are much higher than other kinds of fields of Figwort, Their average damage rate can reach 12.43% and 15.68%. The result of five pesticides against Agrotis ypsilon in field trial shows that the controlling effect of 10% beta-cypermethrin EC 2 000 times and 40% chlorpyrifos EC 1 500 times were 92.53%, 91.69%. Conclusion: Agrotis ypsilon could be well controlled while 10% beta-cypermethrin EC or 40% chlorpyrifos EC are sprayed during the period of Seedling.