What are the main pests of walnuts and how to control them?

The main diseases and insect pests of walnut, 1 bacterial black spot disease, 2 walnut anthracnose, 1 ginkgo biloba, silkworm moth.

In the protection of agriculture and forestry, strengthen the protective measures of walnut plants and the soil and fertilizer of walnut plants, and use agricultural and forestry pruning technology to prune dead leaves and branches for walnut trees to prevent their spread and regrowth. For insect branches, cut them off in time.

1.Walnut limb moth.

The main damage to the fruit, larval moth into the harm, in the green skin moth to eat a number of tunnels, artificial control, before August diseased fruit timely removal, before the winter to completely clear the garden, ploughing the soil to eliminate overwintering insect cocoons; During the emergence-stage of adults, sexual attractants were used to trap male adults and reduce the population density of offspring.

2.Walnut small gidding.

The larvae damage the cortex of the branches, the seriously damaged branches, the leaves are yellow and fall early, and the pesticide is controlled, and when the young trees are damaged, dichlorvos can be applied 10 times the solution in July and August on the scar of the pest.

Walnut trunks are susceptible to canker disease, and the common symptom is long strips of black-brown spots. We can choose varieties with strong disease resistance, and when cultivating, we should pay attention to loosening the soil, improve soil permeability, do a good job of weed removal, reasonable fertilization, and improve the adequate nutrition of walnuts.

Walnut insect infestation is serious, what medicine is used to treat it.

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Walnut insect pests mainly include the inspection of Liangkuan peach beetle, stone fruit beetle, pine wood nematode, etc., and the method varies according to different types of insect pests. Here are some common methods:1

Spraying pesticides: use active ingredients of insecticides to spray in areas and times with serious insect pests, such as antibiotics, carbendazim, etc., pay attention to the use of strict accordance with the drug instructions and dosage requirements. 2.

Filling removal method: this method is suitable for walnut beetle, stone beetle, etc., during the formation of 5 July but fruit, drill a fine needle into the gap of the fruit shape, inject a certain concentration of liquid medicine to kill the eggs or larvae, and then seal the hole, you can remove the harm of this kind of insect pest before the genetic season. The filled hole needs to be sealed in time to prevent adult worms from re-entering the hole to lay eggs.

3.Biological control: This method uses biological methods to control insect pests, such as the use of insects, parasitic nematodes and other natural enemies, to effectively prevent and control the harm of insect pests.

However, this method requires a certain amount of technology and should not be implemented arbitrarily. 4.Inoculation of disease-resistant varieties:

When planting walnuts, disease-resistant varieties can be used to improve the disease resistance of walnuts and reduce the harm of insect pests. It is necessary to pay attention to the above methods need to be reasonably adopted according to the specific situation, and it is best to consult professional agricultural technicians to guide the use, and at the same time pay attention to the safety and environmental protection when using drugs.

Common insect pests of walnut trees include aphids, moths, leaf-eating pests, ginkgo biloba, walnut limb moths, cloud-spotted longhorn beetles, walnut root weevils, walnut fruit weevils, walnut leaf beetles, and walnut small gidding insects. Paramecium, large green leafhopper, walnut inchworm, walnut leaf borer, walnut tumor moth, swallowtail water frog, hickory aphid, yellow whiskered ball beetle, aromatic wood beetle moth, yellow thorn moth.

When the walnut tree is maintained, it is best to plant it in a relatively wide area, so that it has a good ventilation environment, which can reduce the occurrence of disease pants residue pests, and must use healthier seeds, and disinfect once before planting, and when pests and diseases occur, the diseased leaves need to be cut off, and sprayed with pesticides**.

Common diseases of walnut trees.

AnthraxAnthracnose mainly harms walnut fruits, mostly occurs in the rainy season and weak plants, when the disease occurs, the germs will generally enter from the wound, and there will be brown or black lesions in the early stage, and in severe cases, it will cause the fruit to rot and fall off, and the leaves will wither and yellow.

MelanomaWhen walnut trees occur black spot disease, it will cause fruit rot, which is a more serious disease, generally in July and August, it belongs to the peak period of this disease, and it is necessary to prevent and control it in time when it occurs.

Cultivated walnut trees are the main insect pests.

There are many insect pests of walnut trees, but as long as it is not a large-scale insect pest, the damage to the plant is not small, the main insect pests are scale insects, orange pure cattle, beetles and a variety of moths, as long as they are found after timely control, and the removal of infected leaves will not affect the growth of the plant.

When the walnut tree is maintained, it is best to plant it in a relatively wide area, so that it has a good ventilation environment, which can reduce the occurrence of pests and diseases, and must use healthier seeds, and disinfect once before planting.

Bacterial black spot disease, walnut anthracnose, ginkgo biloba silkworm moth, etc., should be regularly applied and management should be strengthened.

Black spot, root rot, these are relatively common insect pests, we must pay attention to the use of pesticides, pay attention to the cleaning of weeds.

For example, giddings, lift-limb moths, wood-leaved inchworms, cloud-spotted longhorn beetles, and parameciums can be controlled with chemical agents, and the problematic parts should also be removed.

The walnut tree is an important fruit tree, but it is threatened by various pests and diseases during its growth. May is a critical period for the growth of walnut trees, and timely measures need to be taken to control pests and diseases to ensure the yield and quality of walnuts. Here are some common ways to control pests and diseases in walnut trees in May.

1. Disease prevention and control.

1. Phytophthora walnut: This disease mainly occurs in a humid environment, which will cause walnut fruit to rot. Control methods include removing fallen leaves and dead branches, maintaining ventilation, and spraying fungicides in a timely manner.

2. Walnut black spot disease: This disease mainly occurs in a high temperature and humid environment, which will cause black spots on walnut leaves and fruits. Control methods include removing fallen leaves and dead branches, maintaining ventilation, and spraying fungicides in a timely manner.

3. Walnut anthracnose: The disease mainly occurs in a high temperature and humid environment, which will lead to black lesions on walnut fruits and leaves. Control methods include removing fallen leaves and dead branches, maintaining ventilation, and spraying fungicides in a timely manner.

2. Pest control.

1. Walnut fruit moth: The insect begins to hatch in May, which will cause walnut fruit to be bored. Control methods include spraying pesticides before the fruit is ripe, removing fallen leaves and weeds around the fruit, etc.

2. Walnut aphid: The insect will suck the sap on the leaves, causing the leaves to turn yellow and curl. Control methods include timely spraying of insecticides, removal of fallen leaves and weeds, etc.

3. Walnut weevil: This insect will dig holes under the bark of trees, causing the trunk and branches to die. Control methods include timely spraying of insecticides, removal of fallen leaves and weeds, etc.

In short, the prevention and control of pests and diseases of walnut trees in May needs to comprehensively consider environmental factors and control methods, and take timely measures to ensure the healthy growth and high yield and high quality of walnuts.