[Damage and control of Agrotis ypsilon on Scrophularia ningpoensis].

OBJECTIVE

To study the damage of Agrotis ypsilon on Scrophularia ningpoensis and the control method, so as to provide scientific basis for its integrated pests management (IPM).

METHODS

The field investigation and the field controlling trial were carried out for the research.

RESULTS

There is obvious relationship between the pre-season crops and the damage degree of S. ningpoensis. The damage rate of the fields which had planted maize and tobacco in the last planting season was much higher than that of the other fields. The average damage rate could reach 12.43% and 15.68%. The result of five pesticides against A. ypsilon in field trial showed that the controlling effect of 10% beta-cypermethrin EC 2000 times and 40% chlorpyrifos EC 1500 times were 92.53% and 91.69%, respectively.

CONCLUSIONS

A. ypsilon could be well controlled while 10% beta-cypermethrin EC or 40% chlorpyrifos EC are sprayed during the period of seedling.