(a) Diseases. 1. Mulberry rust. Symptoms are the swelling of the bud after it has been damaged, its deformed curvature, and the small yellow ridges on the surface (rust). The leaves were damaged. At the beginning, both sides were scattered with round, shiny and slightly yellowish lesions. Afterwards, they gradually became hypertrophy and orange-yellow spots. At the later stage of disease, the epidermis broke and the orange-yellow powder (rust spores) was scattered. Covered with whole leaves, the leaves are easy to fall off, and the silkworm farmer manages it "Gold Sang", commonly known as rust. Control methods: Late July, early August, mid-September and early October, use 25% triadimefon wettable powder 1000 times or 12.5% ​​speedy Poly wettable powder 4000-60 (0x liquid or 30% encyclopedia EC 3000-5000 Double liquid or 80% zein zinc wettable powder 250-300 times liquid spray, once in 7-10 days, 2-3 times in succession, can feed silkworm to feed silkworm after 5 days 2. Mulberry Blight. The plants lost water, and the leaves wilted and drooped, showing a blueish-greenish appearance.The main roots and lateral roots of the diseased plants were damp and rot, some were dark and rotten, and the whole plant died. Prevention and control methods: At present, there is no specific drug to prevent and control the disease. We must strengthen our defenses, based on the author's practical experience, 10 to 15 days after the summer harvest of mulberry trees, use mycotoxin to kill 20-30 ml/mu of agricultural products and 10 million units/mu of agricultural streptomycin, every 10 days, once every 2 hours. -3 times, can effectively control the occurrence of damage.The day can be used to feed silkworm leaves.. 3. Smell violet feather disease. At the time of onset, the root bark initially turned brown, tarnished, and then gradually dark brown, leaving only the cork And xylem.The surface of the damaged root is wrapped with silky purplish-purple root-like hyphae of purple-violet-colored sclerotia. Slow growth of the leaves and leaves, and finally the whole plant withered. Prevention and control method: 50% carbendazim per acre with 5 kilograms of soil mixed with cultivators. (B) Insect pests. From September to September heavier pests are mulberry horses, mulberry powder Aphid, leafhopper, mulberry mulberry, and mulberry, etc. Control methods: Use mulberry insect clear 2000 times solution (residue period is 10-12 days) or 80% dimethoate and dichlorvos 800 times spray residue period is 7 days). (c) Grass damage. After the summer harvest, timely weeding and weeding. It is best not to use herbicides, because herbicides are harmful to mulberry plants, affect tree vigor, and can easily cause silkworm rearing. After the summer harvest, when the mulberry grows to 30-40 centimeters, if it is sprayed with 200 times of EM original plus 0.3% of potassium dihydrogen phosphate, once in 10-15 days, spray 3-4 times. The mulberry grows vigorously, the leaves are thick and green, and the mulberry is extremely resistant to disease. According to the author's practical experience, this method is used to deal with it. The mulberry garden has almost no disease, and the mulberry leaves are fed to the silkworm and the larvae are healthy and honest. Silk length.
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