1 scientific operation of fertilizer water

(1) During the peak period of chestnut, scientific fertilization is carried out in combination with soil fertility and the demand for fertilizer from the tree.

(2) Three key periods of chestnut growth and long-term fertilizer management: from late March to early April (appropriate amount of potassium sulfate compound fertilizer (15-15-15) + urea), mid-July (main pressure green fertilizer), into Before winter (application of fully decomposed farmyard manure).

2 plastic trim

(1) The pruning of chestnut trees is carried out in the winter and summer seasons. The five aspects of pruning should be noted: avoiding excessive damage during trimming, trimming the tree shape, retaining the single branch result, properly retaining branches, and sparse In addition to growing branches.

(2) Winter pruning time: from mid-November to early March of the second year.

(3) Summer pruning time: from the end of June to the beginning of July.

3 fruit management

The main task of fruit setting management is artificial pollination, which improves the fruit setting rate of chestnut trees and increases production.

3.1 application of boron fertilizer

At the flowering stage, spray about 0.5% of borax aqueous solution and spray it three times in a row. At the same time, root fertilization method can also be adopted. When it is just entering the spring, the application of saplings and forest trees is 200-300g/plant. It is appropriate.

3.2 Shuxiong and the awning

When the length of the male inflorescence reaches about 2 cm, the male inflorescences below the result of the branches are removed, and the 1/3-1/2 male flowering branches are cut off.

4 integrated pest control

4.1 Chestnut blight

(1) Hazard

Chestnut blight can also be called blight, dry blight, etc., mainly harming the trunk, main branches, twigs, etc. of chestnut trees. Once it is sick, it will quickly fill with lesions, which will lead to the death of chestnut trees and seriously affect the yield of chestnut. . Chestnut blight is affected by many factors such as temperature and humidity, and it is most likely to occur in the season when rainfall is high.

(2) Control measures

a. Strengthen quarantine work, prohibit seedlings carrying pathogens from entering, and spray a certain concentration of fungicide such as Bordeaux mixture.

b. Choose the appropriate plot for colonization.

c. Strengthen agricultural management and adopt forest management measures such as pruning and fertilization to improve soil fertility.

d. Prevent mechanical damage of chestnut trees, and whiten the trunk with lime in winter or summer to avoid freezing or sunburn caused by high temperature or low temperature.

e. It is found that the lesions should be scraped off in time. For the chestnut trees with serious illness, the whole diseased tree should be cut off and burned.

4.2 Chestnut anthracnose

(1) Hazard

Chestnut anthracnose mainly causes damage to the Fruits, branches and leaves of chestnut trees, and often occurs in the season of heavy precipitation. In severe cases, the branches will wither and die.

(2) Control measures

a. When the winter is pruned, all the dead branches in the chestnut garden will be cut off.

b. After the leaves of the chestnut trees, spray the Bordeaux mixture on the tree body. For the second year of the chestnut tree, it should be sprayed once, which is good for destroying the bacteria in the tree.

4.3 chestnut red spot disease

(1) Hazard

Chestnut red spot disease mainly occurs in the leaves of chestnut.

(2) Control measures

a. During the extension of the chestnut leaves in spring, a certain concentration of Bordeaux mixture is sprayed for prevention.

b. When the red spot disease begins to occur, spray 800 times of carbendazim on the lesion site for prevention and treatment.

4.4 chestnut red spider

(1) Hazard

The red spider mites are mainly adult and nymphs that damage the leaves of the chestnut. When the disease is serious, the leaves of the entire chestnut garden will be hot.

(2) Control measures

a. The trunk is whitened before May of each year, and a ring of 10 cm wide is scraped at the base. Then, a drug such as monocrotophos is applied, and the agent is slightly dried and then applied once, and the agent is dried. After wrapping the ring with a film to prevent red spider disease

b. Apply 80% dimethoate 800-1200 times solution to the chestnut crown of the red spider disease.

4.5 Woodland Sanitary Farmland Weeding

The soil around the chestnut tree is often deep-turned and expanded to promote faster root growth.

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