What are the common pests and diseases of Ophiopogon japonicus? Detailed explanation of prevention and control methods
Ophiopogon japonicus is one of the commonly used traditional Chinese medicinal materials in China. It has the effects of clearing heat, moistening the lungs, nourishing the stomach, and promoting fluid production to quench thirst. It has powerful effects and is widely used. It is cultivated in many regions of China and is a crop that combines medicinal and economic value. During its cultivation, pests and diseases are important factors affecting its yield. Below, Qinnongwang brings you the common pest and disease prevention and control methods for Ophiopogon japonicus.
1. Black spot disease
Black spot disease mainly begins to occur in April, and is even more severe in rainy seasons. In the early stage of the disease, the leaves begin to turn yellow and gradually spread toward the base of the leaves, producing irregular lesions of various colors, until the leaves slowly wither, affecting plant growth. Its pathogen is relatively tenacious, can resist low temperatures and overwinter, and becomes a new pathogen the following year.
Prevention and control methods: Select varieties with strong growth and strong disease resistance for planting. Before planting, disinfect the soil and seeds to maximize the elimination of pathogens from the source. When disease is found, promptly remove diseased leaves and burn them in a centralized manner. Spray with Bordeaux mixture or carbendazim to disinfect.
2. Root-knot nematode
As the name suggests, root-knot nematode harms the roots of Ophiopogon japonicus. It is relatively small in size and harms the plant roots by forming root knots of varying sizes. These root knots then grow fibrous roots, and the tips of these fibrous roots are again infected by root-knot nematodes, forming small root knots. In this way, it gradually spreads throughout the entire root system, affecting plant growth.
Prevention and control methods: Avoid continuous cropping. It is best to implement crop rotation, but the rotation should preferably be with grass-family crops, and as far as possible not with other crops, otherwise it may have the opposite effect. Select healthy, disease-free seedlings for planting. When planting, cut off old roots, which can prevent carrying insects. Disinfect and disinfest the planting soil before planting.
3. Mole cricket
Mole crickets mainly harm seedlings. Both adults and larvae can harm plants, feeding on seedling roots, often gnawing the seedling roots clean and causing the plants to die. They are mostly active at night and are phototactic and attracted to manure.
Prevention and control methods: Before planting, while turning the soil, dilute phoxim emulsifiable concentrate and spray it on the soil, then turn the medicated soil into the ground. This can kill insect eggs to a certain extent. During the plant growth period, mix phoxim granules or isofenphos-methyl granules with fine soil and evenly spread them on the soil.
The above are the common pests and diseases of Ophiopogon japonicus and their prevention and control methods. I believe everyone now has some understanding of the pests and diseases of Ophiopogon japonicus and their prevention and control methods. For more related agricultural knowledge, please stay tuned to Qinnongwang.