What are the common diseases and insect pests of hawthorn trees, and how to prevent and control hawthorn tree diseases and insect pests?

Common diseases and insect pests of hawthorn trees include powdery mildew and dieback.

The surface of young hawthorn powdery mildew-infected fruits is covered with a layer of white powdery substance, and the diseased parts harden and crack, leading to deformities; the fruit is damaged near the maturity stage, producing reddish-brown lesions and the fruit surface is rough.

In the early stage of the onset of hawthorn powdery mildew, pesticides should be applied promptly to prevent and control it. It is best to use a mixture of protective agents and therapeutic agents to prevent further expansion of the disease.

The dieback disease mainly damages the fruit stump, which is where the fruit stem is located. In the early stage of the dieback disease, the fruit stump will slowly turn black from top to bottom, and then They appear dry and curled up, and there are obvious symptoms.

Hawthorn trees need to choose some relatively disease-resistant varieties for planting, and they also need to strengthen management after planting. Pruning and leaf cutting should be carried out in a reasonable way, and the soil also needs to be deeply plowed. Yes, it is generally necessary to spread some fertilizer during deep plowing.

Extended information

Precautions for planting hawthorn trees

1. Hawthorn trees should be pruned and cut in a reasonable way in winter. Some diseased branches and leaves should be cut off in time, so as to eliminate the source of the disease and dead branches.

2. Some pesticides can be sprayed before germination in spring, but the spraying must be done in a reasonable proportion.

3. When spraying chemicals, the amount of chemicals should be prepared in a reasonable proportion, but the amount of chemicals should not be too much or too little.

Baidu Encyclopedia - Hawthorn Tree

Baidu Encyclopedia - Powdery Mildew

Baidu Encyclopedia - Blight Disease