What are the pest and disease control methods for licorice?
Licorice, also known as Guolao and sweet grass, is a tonic Chinese herbal medicine, a kind of medicine that is very good for the human body. We are all fairly familiar with it. It can treat many diseases and has extremely high medicinal value. At present, it is planted in all major regions, but during the planting process, pests and diseases will occur and harm its growth. Below, follow the editor to take a look at the introduction to its pest and disease control methods.
1. Rust disease
Rust disease is a fungal disease. When it occurs, yellow-brown spots appear on the underside of the leaves. Later, the spots rupture and release rust-colored powder. These are the spore masses of the pathogen, which will continue to spread with the wind.
Control methods: After discovering diseased plants, pull them out and burn them in a centralized manner. You can also spray 0.3-0.4 degrees Baume lime sulfur mixture plus Dixiugang at the early stage of the disease for control, spraying once every 7-10 days, with good results.
2. Brown spot disease
This is also a fungal disease. When it occurs, round or irregular spots appear on the leaves. The center of the spots is grayish brown, and the edges are brown. In the later stage, gray-black mold-like substances appear on the spots until the leaves wither and die.
Control methods: When the disease occurs, promptly remove diseased leaves. If it has already spread throughout the whole plant, promptly pull out the diseased plant. At the early stage of the disease, spray Bordeaux mixture or thiophanate-methyl for control.
3. Powdery mildew
It is somewhat similar to rust disease. When it occurs, water-soaked spots appear on the leaves, and white powdery substances appear on the spots in the later stage, harming the plant and causing it to become stunted and deformed.
Control methods: Its control methods are somewhat similar to those for rust disease. At the early stage of the disease, spray 0.2-0.3 degrees Baume lime sulfur mixture for control.
4. Aphids
Aphids gather on the leaves as adults and nymphs, continuously sucking the sap from the leaf tissues. After being sucked, the leaves show yellow spots. In severe cases, they can suck the leaves dry in a short time, and they also damage the stems, causing the stems and leaves to turn yellow and die.
Control methods: Combined with winter garden cleaning, bury the plants and fallen leaves deeply. When the disease occurs, apply dimethoate and fenitrothion for control, once every 7-10 days, for 3-4 consecutive times.
5. Red spider mites
They mainly break out in August-September, mainly harming leaves and flower spikes. They are somewhat similar to aphids, sucking the plant's sap, causing leaves to turn yellow and wither, and flower spikes to wither and fall off.
Control methods: The control methods for aphids can be used for control.
The above is an introduction to the pest and disease control methods for licorice. I hope it can help you. To learn more related knowledge, please follow us.