What are the common diseases and insect pests of Ophiopogon japonicus? What are the prevention and control methods?

Mai Dong is a kind of common traditional Chinese medicine for clearing away heat, moistening lung and promoting salivation. It has a wide range of applications. It is a crop integrating medicinal and economic value. It is easy to be invaded by diseases and insect pests during planting. What common diseases and insect pests do Mai Dong have? What are the prevention methods?

I. Black spot disease

Black spot disease mainly began in April, especially in rainy season, the disease was more serious, the leaves began to yellow at the beginning of the disease, and gradually spread to the base of the leaves, producing irregular spots of various colors, until the leaves began to wither slowly, affecting plant growth. Its pathogen is relatively tenacious, resistant to cold winter, and in the following year become a new pathogen.

Control method: select strong growth, strong disease resistance varieties for planting, disinfect soil and seeds before planting, eliminate germs from the source to the maximum, remove diseased leaves in time when diseases are found, burn them intensively, spray Bordeaux mixture or carbendazim for sterilization.

II. Root Nematode

Root nematodes could be known from their names. They harmed the roots of Radix Mai Dong. They were small in size and harmed the roots of plants to form roots of different sizes. These roots would grow hairy roots, and the ends of these hairy roots would be infected by root nematodes again to form small roots. In this way, they would slowly spread throughout the roots and affect the growth of plants.

Control methods: avoid sitting, it is best to implement rotation method, but rotation and undergraduate crop rotation, try not to rotate with other crops, otherwise counterproductive. Healthy and disease-free seedlings are selected for planting, old roots are cut off during planting, so that insects can be prevented from being carried, and the planting soil is disinfected and treated before planting.

III. mole cricket

Gryllocricket mainly harm seedlings, its adults and larvae can harm plants, to nibble seedling roots for food, often will nibble seedling roots clean, resulting in plant death, it is more active at night, there are phototaxis and dung.

Control methods: before planting combined with soil turning, phoxim EC diluted spray soil, and then turn the soil medicine, so that to a certain extent to kill eggs. During plant growth, mix fine soil with phoxim granules or methylisothion granules and sprinkle evenly on the soil.

The common diseases and insect pests of Mai Dong are mentioned above. I hope the growers can prevent and control diseases and insect pests in time to ensure the harvest of Mai Dong.