Common diseases and insect pests of Radix opand their control methods

Ophiopogon japonicus is one of the commonly used traditional Chinese medicine in China. It has the effects of clearing heat, moistening lungs, nourishing stomach, promoting fluid and relieving thirst. It is powerful and widely used. It is planted in many areas of our country. It is a crop of medicinal and economic value. In its planting process, diseases and insect pests are an important factor affecting its yield, the following pro-agricultural network brings you common pest control methods of Ophiopogon japonicus.

1. Black spot

Black spot mainly began to occur in April, especially in the overcast and rainy season. At the initial stage of the disease, the leaves began to yellowing, and gradually spread to the base of the leaves, resulting in irregular disease spots of various colors, until the leaves began to wither slowly, affecting plant growth. Its pathogen is more tenacious, can survive the winter at low temperature, and become a new pathogen in the coming year.

Control methods: select varieties with strong growth and strong disease resistance to plant, disinfect the soil and seeds before planting, maximize the elimination of bacteria from the source, remove the diseased leaves in time when diseases are found, burn them centrally, and spray them with Bordeaux solution or carbendazim.

2. Root nematode

Root nematodes can be known from the name that it harms the roots of Ophiopogon japonicus, its size is small, and root knots of different sizes are formed at the roots of the plant, and these root knots will grow into hairy roots, and the ends of these roots will be infected by root nematodes again to form small root knots, thus slowly spreading the whole root and affecting plant growth.

Prevention and control methods: avoid continuous sitting, it is best to implement the method of rotation, but rotation and undergraduate crop rotation, try not to rotate with other crops, otherwise it will be counterproductive. Select healthy, disease-free seedlings to plant, cut off the old roots when planting, so as to prevent carrying insects, disinfect the planting soil after disinfestation.

3. Mole cricket

Mole cricket mainly harms seedlings, its adults and larvae can harm plants, eat the roots of seedlings as food, often eat clean roots of seedlings, resulting in plant death, it is mostly active at night, phototaxis and faeces.

Prevention and cure method: combine turning the soil before planting, spray the soil after the phoxim EC is diluted, and then turn the medicinal soil into the soil, which can kill the eggs to a certain extent. During the plant growth period, phoxim granules or methyl isophos granules were mixed with fine soil and scattered evenly on the soil.

The above are common diseases and insect pests and control methods of Ophiopogon japonicus. I believe you also have a certain understanding of Ophiopogon diseases and insect pests and control methods. Please pay attention to the pro-agricultural network for more agricultural knowledge.