The Latest Methods for Controlling Pests and Diseases of Licorice

Licorice, also known as Guolao and sweet grass, is a tonic Chinese herbal medicine, a medicine that is very good for the human body. We are fairly familiar with it; it can treat many diseases and has extremely high medicinal value. It is currently 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

Rust is a fungal disease. When it occurs, yellow-brown lesions appear on the underside of the leaves. Later, the lesions rupture and release rust-colored powder. These are the spore masses of the pathogen, which will continue to spread with the wind.

Control method: After discovering diseased plants, pull them out and burn them in a centralized manner. At the early stage of the disease, you can also spray 0.3-0.4 Baume lime sulfur mixture plus Dixiugang for control, spraying once every 7-10 days, with good results.

2. Brown spot

This is also a fungal disease. When it occurs, round or irregular lesions appear on the leaves. The center of the lesions is grayish brown, and the edges are brown. In the later stage, gray-black mold-like substances appear on the lesions until the leaves wither and die.

Control method: When the disease occurs, promptly remove diseased leaves. If it has already spread throughout the whole plant, promptly pull out the diseased plants. At the early stage of the disease, spray Bordeaux mixture or thiophanate-methyl for control.

3. Powdery mildew

Somewhat similar to rust, when it occurs, water-soaked lesions appear on the leaves, and white powdery substances appear on the lesions in the later stage, harming the plant and causing it to become short and deformed.

Control method: Its control method is somewhat similar to that of rust. At the early stage of the disease, spray 0.2-0.3 Baume lime sulfur mixture for control.

4. Aphids

Aphids gather on the leaves as adults and nymphs, constantly sucking the sap from the leaf tissues. After sucking, yellow spots appear on the leaves. In severe cases, they can suck the leaves dry in a short time and also harm the stems, causing the stems and leaves to turn yellow and die.

Control method: 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 and mainly harm the leaves and inflorescences. Somewhat similar to aphids, they suck the plant's sap, causing the leaves to turn yellow and wither, and the inflorescences to wither and fall off.

Control method: The control methods for aphids can be used for control.

The above is an introduction to the pest and disease control methods for licorice. We hope it can help you. If you want to learn more related knowledge, please follow us.