Pest control of traditional Chinese medicine Ophiopogon japonicus

The roots of the plants damaged by nematodes form rosary-shaped root knots of different sizes, and adventitious hairy roots can grow on the root knots. The ends of these hairy roots are again infected by nematodes to form small root knots. There is also a root knot on the tuber root, the whisker root is shortened, and the epidermis is rough and cracked, showing reddish brown. Cut open the root knot, you can see the white shiny ball, that is, the female adult.

Prevention and control methods:

1. Do well in crop rotation. Do not rotate with tobacco, Ziyunying, beans, potatoes, melons, Atractylodes macrocephala, Salvia miltiorrhiza and other crops, but preferably with Gramineae crops.

2. Select disease-free seedlings and cut off the old roots to prevent infestation.

3. Soil treatment was carried out. Before planting, 5 kg of 5 grams of phosphorus granules per mu can be applied to the border soil, or 40% methyl isosphos EC can be used, 1 kg per mu with fine sand scattered in the border soil, mixed with the topsoil, and then planted.