How to prevent the harm of chestnut pruning beetle? How to kill?

To prevent the formation of pests, spray the pests in advance to prevent the formation of insects.

Chestnut tree pruning is divided into winter and summer pruning. Winter pruning is carried out after the leaves have fallen and before germination in the following spring, and it promotes the growth of the millet and the formation of female flowers. The main methods are truncation, thinning, retraction, slow release, pulling and cutting.

Summer pruning mainly refers to budding, topping, male removal and thinning during the growing season, and its function is to promote branching, increase female flowers, and improve seed setting rate and single grain weight.

1. Stubbing: Cut off a part of the annual branch. Stubbing promotes branching, strengthens the tree, compacts the canopy, reduces male flowers, and regulates the distribution of nutrients. Delayed pruning can be used for wang trees and wang branches, and truncation can be carried out after germination.

2. Retraction: It is a stub for perennial branches. It is mostly used for perennial branches with weak growth, outward migration of fruiting parts, and severe baldness in the inner chamber.

3. Thinning branches: that is, the slender branches of the raw branches, the light branches and the inner chamber are thinned from the base.

4. Wearing hat scissors: winter stubbing is carried out near the new tip wheel marks with different topping times. Leaving 2-4 small buds on the new shoot ring mark is called wearing a live cap pruning, if properly treated, the small bud on the cap and the large bud under the ring mark can extract the fruiting branches.

If the buds are not left on the new shoot wheel marks, it is called wearing a dead cap to prune, so that the large buds under the ring marks will extract fruit branches. Under normal circumstances, those with weak branches wear dead hat scissors, and those with strong branches wear live hat scissors.

5. Slow release: Slow release is not cut. The main function is to disperse nutrients and moderate the tree. Slow pruning is mostly used for wang trees.

6. Pulling branches and carving: For the strong and prosperous auxiliary branches that are not topped in the canopy, they will be flattened during the spring sap flow to the bud blooming, and the carving will be carried out above the buds that need to germinate, so that the strong branches can be extracted, and then the slowly flattened branches will be retracted to the part of the strong branches when pruning in winter.

7. Topping: When the new shoots grow to 30 cm, remove the top of the new shoots. It is mainly used on the wang branches, the purpose is to promote the growth of branches, early fruiting.

Topping 2-3 times a year. The new shoots of the fruiting branches of the fruiting trees are long and vigorous, and when the front shoots of the fruit grow, leave 3-5 buds for topping. After topping the tip of the fruit, it can form about 3 robust branches, increase the proportion of fruiting branches, and at the same time slow down the outward migration of fruiting parts. Its main function is to control nutrition, promote the formation of female flowers and improve the strength of knotting.

The chestnut tree is a deep-rooted plant, and if it is to be thoroughly, the following measures need to be employed:1Manual dust return to the roots:

After cutting off the trunk of the chestnut tree, use a shovel or shovel to dig out the root system and remove all the roots from the root system. This method is suitable for individual trees. 2.

Chemical Method: Herbicides containing glyphosate components such as 2,4-d can be sprayed on the incisions and leaves of chestnut trees to allow them to climb to the roots and destroy the root system. However, please note that chemical root removers are harmful to the environment and human health, so please read the instructions carefully and take necessary safety measures before use.

3.Mechanical root removal: The root system is removed by digging with a root remover or excavator, which is suitable for large-scale root removal.

Regardless of which method is used, the root system needs to be adequately cleared to ensure that the roots are thorough**. At the same time, it is also necessary to pay attention to environmental protection and safety issues.

1) Early fruiting, early yield Through plastic pruning, it can promote branching, early forming, increase the proportion of fruit branches, and help early fruiting and high yield;

2) Adjust the structure of the tree and expand the fruiting space Chestnut likes light, and the backbone branches are evenly distributed through plastic pruning, the structure is reasonable, the leaf curtain is evacuated, and the level is clear, so that the inner chamber has good light conditions, prevents the inner chamber from being bald, slows down the outward migration of the fruiting part, and increases the effective fruiting volume of the canopy;

3) Regulate nutrient distribution, stabilize yield, improve quality, avoid the occurrence of large and small years, through pruning, can balance the tree potential, mediate the proportion of vegetative growth and reproductive growth, and achieve the purpose of high and stable yield year after year;

4) Rejuvenation of the tree: Through pruning, the weak and senescent trees are renewed and rejuvenated, and the yield is abundant again;

5) Improve fruit quality The flower bud differentiation period of chestnut is different from that of apple and pear, the flower bud differentiation of apple and pear is completed in the previous year, while the female flower differentiation of chestnut is completed in the spring of the same year. Apples and pears can improve fruit quality through pre-flowering pruning, flower thinning, fruit thinning and bagging, while chestnut can only improve fruit quality and yield by pruning and controlling the number of branches. Excessive number of branches is left, which affects the differentiation of female flowers due to insufficient nutrition; Sometimes the yield is high but the quality is too poor (the fruit is too small), and the amount of branches left is too small, which affects the yield.

Therefore, chestnut pruning is more important than other fruit trees.