Discussion on the occurrence symptoms and control strategies of walnut diseases and insect pests
Walnuts can also be called walnuts and peaches. Therefore, they are rich in trace elements and minerals, as well as various vitamins such as carotene and riboflavin. They are known as “Longevity†and “longevity fruitâ€, and the market value is also very high. In the process of walnuts, the quality and yield of walnuts are always affected by various pests and diseases. Therefore, today Xiaobian will briefly talk about the symptoms and control measures of walnut pests and diseases. 1 Types of pests and diseases and influencing factors Common pests and diseases of walnuts include walnut black spot, walnut powdery mildew, walnut blight, walnut rot disease, walnut limb moth, cloud spotted beetle, walnut saddle elephant, etc. In recent years, climate anomalies have caused frequent occurrence of pests and diseases, especially It is the impact of freezing damage on the occurrence of pests and diseases. The degree of frost damage is closely related to walnut varieties and tree age, and the damage of fine varieties, saplings and weak trees is serious. 2 Symptoms Walnut pests and diseases mainly damage leaves, fruits, branches and roots. 2.1 Leaf pests and diseases The leaf pests and diseases are mainly walnut brown spot and walnut leafhopper. Walnut brown spot disease can cause lesions in the leaves, while the walnut leafhoppers feed on the leaves, resulting in a hole-like incompleteness. 2.2 Fruit pests and diseases Fruit pests and diseases mainly include walnut black spot disease and walnut limb moth. After the black spot of walnut, it will cause brown spots on the surface of the walnut, which will cause the fruit to sag in the later stage, causing the fruit of the walnut to fall off. The walnut moth is caused by the larva breaking into the walnut fruit, which causes the damaged walnut peel to become black and begin to sag, causing early fruit drop and seriously affecting the yield of walnut. 2.3 Branches and diseases pests and diseases The main pests and diseases of the branches are litter, rot, and zebra, which often occur during the walnut growing season. Walnut wilt disease mainly infects one to two years of shoots, causing the damaged branches and leaves to turn yellow and fall off in advance. At the beginning of the walnut rot disease, the trunk cortex flows out of black water, which will cause the branches to rot in the later stage. The larvae of the larvae are damaged by the larvae, causing the growth and poor development of the walnut trees. 2.4 Root pests and diseases The root pests and diseases are mainly walnut root rot, which often occurs in the seedling stage of walnuts, which causes the roots of the seedlings to rot, and the leaves in the upper part of the leaves are yellow, which causes the seedlings to die in severe cases. 3 Prevention and control measures 3.1 Physical control For the saplings of the newly-built garden from one to two years, the winter tree trunks are painted with white, the trees are covered with grass, and the soil is protected by cold. For the three to five-year-old walnut trees, in addition to the basic cold-proof treatment, 30 cm of high soil is cultivated under the trees every winter. Heap, anti-frozen root neck and marrying interface; for fruit trees with more than six years old, timely watering of trees in winter and spring; strengthen comprehensive management of trees and enhance tree resistance; scientific application of farmyard manure, phosphate fertilizer, potash fertilizer, combination Scientific pruning method to enhance the tree potential; delay the pruning time, delay the germination period of the walnut tree, and effectively avoid the late frost and late freezing damage. 3.2 Forestry technology prevention Choose grafting varieties suitable for local planting and disease resistance (such as Xiangling, Luguang, Weiner, Shannu 5 and Liaohe No. 1), do field management and reasonable fertilization and pruning; walnut fruit After harvesting, the branches and fruits of the pests and diseases are removed, and the diseased skin and the old skin are scraped off, and the plants are burned out or buried outside the park; the prediction of the pests and diseases is actively carried out, and the biological characteristics of the pests are controlled. 3.3 Chemical control 3.3.1 Walnut powdery mildew: In the early stage of the disease, spray 0.3°Bé stone sulphur mixture 1 125~1 500 kg/hm 2 , or spray with 50% methyl thiophanate 1000 times solution; in order to prevent phytotoxicity in summer, It can be sprayed with 1% Bordeaux mixture or with 50% wettable antibacterial 800 times solution. 3.3.2 Walnut brown spot: In mid-June and early July, each spray was 1:2:200 Bordeaux mixture or 50% methyl thiophanate 800 times solution. 3.3.3 Walnut leafhopper: During the larval attack period, spray the insecticides such as trichlorfon, phoxim and acaricidal bacteria for prevention and treatment. 3.3.4 Walnut Saddle: During the period of large number of adult excavation, spray 40% of Lego emulsifiable concentrate 1 200~1 500 times.
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[Name] Medical Cold Patch
[Package Dimension] 10 round pieces
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[Indications]
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[How To Use a Patch]
Please follow the Schematic Diagram. One piece, one time.
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[Attention]
Do not apply the patch on the problematic skin, such as wounds, eczema, dermatitis,or in the eyes. People allergic to herbs and the pregnant are advised not to use the medication. If swelling or irritation occurs, please stop using and if any of these effects persist or worsen.notify your doctor or pharmacist promptly. Children using the patch must be supervised by adults.
[Storage Conditions]
Store below 30c in a dry place away from heat and direct sunlight.