What are the dangers to fruit trees? How can it be prevented or prevented?

When the fruit tree sprouts black, it will become very dry; If conditions permit, it can be captured manually, illuminated with lights, and wrapped with glass tape on the branches, and it will generally slide down the tape when you know it; It is also possible to spray insecticides in advance; It is also possible to build high-pressure obstructions, which can be prevented and controlled by this physical method; It can use a black light to kill pests with a special smell; Reasonable fertilization can reduce the resistance to pests such as Zhizhi, so as to reduce the damage to fruit trees.

It will lay eggs on the tree, suck the sap to reproduce the next generation, and destroy the fruiting branches, which is particularly harmful to the growth of fruit trees; Drugs can be used**, or they can be manually killed or booby-trapped, or they can be cut off.

It will cause the leaves of fruit trees to turn yellow or even wilt, which will affect the absorption of nutrients and may damage fruit branches. It is necessary to spray pesticides in a timely manner, but also to prevent them in advance, and at the same time to promote ventilation and light.

If you inhabit the tree for a long time, it will suck the sap of the root system and cause malnutrition of the tree, so you can use some medicine to remove it in advance to prevent egg laying.

Cicadas (know) mainly take nymphs in the soil as the root of the pest, after the emergence of adults, there is a strong ability to migrate, causing certain difficulties to the control, is one of the most difficult pests to prevent fruit trees at present, and the effect of pesticide control is not ideal.

1. Drive away adult worms.

During the oviposition period from late June to August, the fruit trees are manually knocked with bamboo poles to drive away the adults, which can reduce the amount of eggs laid, and this measure can reduce the adult insects to damage the branch tips about 15.

2. Artificial capture or booby-trapping.

When the mature nymphs emerge and emerge, the unearthed nymphs and newly emerged adults are captured in the morning and evening; Taking advantage of its phototaxis, it burns bonfires on the ground in a moonless dark sky to shake trees and flutter cicadas.

3. Prune the spawning branches.

Combined with summer pruning to completely remove the spawning branches, the earlier the better, too late eggs fall into the ground due to wind and rain will continue to damage the root system, in combination with winter pruning and garden concentrated burning, is also one of the effective methods.

4. Drug prevention and treatment.

In the spawning period, spraying hypertonic strong systemic agents and contact killers has a certain control effect, and organophosphorus systemic agents with low residues and high-efficiency pyrethroid contact killers are used.

5. Use repellents.

Insect treatment, after autumn, pick up the old adult of mildew and put it in a large-mouth bottle, add water to submerge the insect body, and then seal the bottle mouth tightly with rosin or beeswax, take out the juice and stir it in the initial oviposition period of the adult in the following year, add 30 kg of water per kilogram to spray the fruit tree, have a strong repellent effect.