What are the common pests and diseases of the purple-leaf sand cherry?

1. Diseases.

The common disease of the purple-leaf sand cherry is crown gall, a bacterial disease. Once infected, it causes the root stem mass of the purple-leaf sand cherry to overgrow into a gall-like shape, which is why it is called crown gall. This bacterium mainly spreads when watering trees, through rainwater and during the transport of seedlings, entering through tree wounds to cause disease. Once crown gall occurs, the growth and ornamental appearance of the purple-leaf sand cherry are affected, and in severe cases it can lead to the death of the tree.

2. Pests.

During its growth, the main pests the purple-leaf sand cherry encounters are slug moths, aphids, red spiders and grasshoppers.

Pest and disease control methods for the purple-leaf sand cherry

1. Disease control methods.

A strict inspection system should be implemented, with checks carried out before the transport of seedlings. Once crown gall is found, the tree should be destroyed immediately, and the site where the diseased tree was planted should be thoroughly disinfected with quicklime or bleaching powder and other agents. After disinfection, no tree seedlings should be planted in the soil for one week.

For seedlings with an initial infection, the diseased part can be cut away with a knife, and then the wound can be coated with lime milk and other agents to control the disease.

If it is an already mature trunk, once it suffers from crown gall, penicillin, streptomycin and oxytetracycline can be used for subcutaneous injection or root soaking, which has a significant therapeutic effect on crown gall.

For seedlings that cannot be confirmed as infected with the crown gall bacterium, they can be soaked in a 1% copper sulfate solution before planting, then rinsed clean with water after five minutes before planting.

2. Pests.

For pests, during the annual winter whitewashing, the trunk and large branches of the purple-leaf sand cherry can all be whitewashed, and at the same time the eggs and cocoons should be removed completely. As the trees grow in early spring, fungicides such as chlorothalonil and carbendazim should be sprayed in time for pest prevention. Slug moths, aphids, leafhoppers and scale insects can be killed by spraying deltamethrin and similar agents, and red spiders can be controlled with dicofol.

Control of the main pests and diseases of the purple-leaf sand cherry

During cultivation, the purple-leaf sand cherry is harmed byslug moths, aphids, red spiders, leafhoppers and scale insects. When whitewashing in winter each year, the main trunk and large branches should be whitewashed as much as possible, and the eggs and cocoons should also be scraped off clean. In early spring, broad-spectrum fungicides such as chlorothalonil and carbendazim should be sprayed in time.

If diseases occur, they should be treated promptly. Slug moths, aphids, leafhoppers and scale insects can be killed by spraying deltamethrin and similar agents,red spiderscan be controlled with dicofol.