膜的

Toxic symptom and antifeedant activity of tutin were observed on the larvae of Mythimna separate with 3, 4 and 5 instar by leaf disk method.

采用小叶碟添加法观察经羟基马桑毒素处理后的粘虫中毒症状，并测定3龄、4龄和5龄粘虫的拒食活性。