Control methods of diseases and insect pests of licorice

Licorice, another country old, sweet grass, is a kind of beneficial Chinese herbal medicine, a good medicine for the human body, we are still familiar with it, it can treat a variety of diseases, high medicinal value. At present, it is planted in all major areas, but diseases and insect pests will harm its growth in the process of planting. Let's take a look at its pest control methods together with Xiaobian.

1. Rust

Rust is a fungal disease, when the disease occurs, there are yellowish-brown spots on the back of the leaves, and later the spots will break and emit rust-colored powder. these are the spores of the pathogen, which will continue to spread with the help of the wind.

Prevention and treatment methods: after diseased plants are found, the diseased plants can be pulled out and burned centrally, and 0.3-0.4 Baomedu stone-sulfur mixture can also be sprayed to prevent and cure the disease, once every 7-10 days, the effect is better.

2. Brown spot

It is also a fungal disease, when the disease occurs, the leaf appears round or irregular disease spot, the center of the disease spot is grayish brown, the edge is brown, in the later stage, the disease spot will appear gray-black mildew until the leaf dies.

Prevention and treatment methods: remove the diseased leaves in time when the disease occurs. If the whole plant has spread, the diseased plants should be removed in time. Bordeaux solution or methyl topiramate can be sprayed to prevent and cure the disease at the initial stage of the disease.

3. Powdery mildew

Similar to rust, there are watery spots on the leaves at the onset of the disease, which will appear white powder in the later stage, harming the plant and causing the plant to be short and deformed.

Prevention and control methods: its prevention and control methods are similar to rust, the initial stage of the disease can be sprayed 0.2-0.3 Baumedu stone sulfur mixture to prevent and cure.

4. Aphids

Aphids gather in the leaves as adults and nymphs, constantly sucking the branches and leaves of the leaf tissue, and the leaves will appear yellow spots after sucking. In severe cases, they will suck the leaves clean in a short time, and cause the stems and leaves to yellowing and withering.

Prevention and control methods: combined with winter garden cleaning, the plants and fallen leaves are buried deeply, and the disease is controlled by Enshi dimethoate and fenitrothion, once every 7-10 days, 3-4 times in a row.

5. Red spider

It mainly occurs from August to September, mainly harming leaves and inflorescences, similar to aphids, sucking plant juice, causing leaves to yellowing and wilting, inflorescences withering and falling off.

Control methods: aphids can be used to control.

The above is the introduction of licorice pest control methods, hope to help you, want to know more related knowledge, please pay attention to us.