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First, peanut leaf spot disease: including brown spot, black spot. The spot of brown spot disease is round, brown, large, with a yellow halo on the outer edge of the lesion, and a gray mold in the later stage; the spot of the black spot is round, dark brown, and there is no yellow halo around the lesion. The lesion is smaller than the brown spot.
Control measures: rational rotation, selection of resistant varieties, high temperature and rainy July and August is the key period to prevent and control peanut leaf spot disease. In the early stage of the disease, 50% carbendazim 800 times solution or 75% chlorothalonil WP can be sprayed. 600 times liquid or Daisen zinc 800 times solution, spray once every 15 days, a total of 2 to 3 times, can effectively prevent peanut leaf spot disease.
Second, the flower rust disease: the first to start from the bottom leaf. The leaves produce yellow erythema, small shape, surrounded by yellow halo, rust-colored powder appears after the epidermis cracks, and the leaves become yellow and dry and fall off when severe.
Control measures: 75% chlorothalonil 600 times solution or 25% powder rust 500 times solution in the early stage of the disease.
3. Underground pests: The underground pests of peanut fields mainly include tigers and crickets. It is not only a long-term hazard, but also serious. Often caused by lack of seedlings and ridges, reduced production, is currently the main pest affecting peanut yield. Underground pests often inhabit underground activities, directly affecting the roots and fruits of peanuts, which are concealed and difficult to control.
Prevention:
(1) Agricultural control. Reasonable rotation, peanuts, good fore crops are corn, wheat, millet and other grass crops. Avoid repeating. Deep ploughing in autumn, turning the pests to the ground, causing them to be exposed to the sun or being eaten by birds and birds, reducing the source of insects.
(2) Chemical control. Seed dressing with seed coating before planting. This method can effectively prevent rodents. When planting before planting, use 3% granules of carbofuran 22.5 to 30 kg or 3% of phorate granules 22.5 to 30 kg per hectare evenly spread on the surface of the field, shallow turn; or carbofuran, phorate Sowing in the seed ditch, and then sowing; can also be used in the organic fertilizer as a base fertilizer. In the late June, in the hatchery period and the young age of the chafer, 35 to 45 kg of zinc-sulfur granules and 250 to 300 kg of fine soil per hectare were sprinkled on the roots of the peanuts, and the soil was shallowly placed. It can also be rooted with 50% zinc sulphur granules or 90% trichlorfon 1000 times.
Aphids: Aphids not only suck peanut juice, but are also the main medium for spreading viruses. It can be controlled with 40% omethoate 1000 times solution.
Control measures: rational rotation, selection of resistant varieties, high temperature and rainy July and August is the key period to prevent and control peanut leaf spot disease. In the early stage of the disease, 50% carbendazim 800 times solution or 75% chlorothalonil WP can be sprayed. 600 times liquid or Daisen zinc 800 times solution, spray once every 15 days, a total of 2 to 3 times, can effectively prevent peanut leaf spot disease.
Second, the flower rust disease: the first to start from the bottom leaf. The leaves produce yellow erythema, small shape, surrounded by yellow halo, rust-colored powder appears after the epidermis cracks, and the leaves become yellow and dry and fall off when severe.
Control measures: 75% chlorothalonil 600 times solution or 25% powder rust 500 times solution in the early stage of the disease.
3. Underground pests: The underground pests of peanut fields mainly include tigers and crickets. It is not only a long-term hazard, but also serious. Often caused by lack of seedlings and ridges, reduced production, is currently the main pest affecting peanut yield. Underground pests often inhabit underground activities, directly affecting the roots and fruits of peanuts, which are concealed and difficult to control.
Prevention:
(1) Agricultural control. Reasonable rotation, peanuts, good fore crops are corn, wheat, millet and other grass crops. Avoid repeating. Deep ploughing in autumn, turning the pests to the ground, causing them to be exposed to the sun or being eaten by birds and birds, reducing the source of insects.
(2) Chemical control. Seed dressing with seed coating before planting. This method can effectively prevent rodents. When planting before planting, use 3% granules of carbofuran 22.5 to 30 kg or 3% of phorate granules 22.5 to 30 kg per hectare evenly spread on the surface of the field, shallow turn; or carbofuran, phorate Sowing in the seed ditch, and then sowing; can also be used in the organic fertilizer as a base fertilizer. In the late June, in the hatchery period and the young age of the chafer, 35 to 45 kg of zinc-sulfur granules and 250 to 300 kg of fine soil per hectare were sprinkled on the roots of the peanuts, and the soil was shallowly placed. It can also be rooted with 50% zinc sulphur granules or 90% trichlorfon 1000 times.
Aphids: Aphids not only suck peanut juice, but are also the main medium for spreading viruses. It can be controlled with 40% omethoate 1000 times solution.
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