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Prevention and control of potato tuber moth
Potato tuber moth, also known as potato wheat moth, tobacco leaf miner, etc.; is Lepidoptera Gatricidae. Domestically distributed in 14 provinces (regions), the cloud, Guizhou, Sichuan and other provinces suffered more. The main damage is Solanaceae, among which potato, tobacco and eggplant are the most affected, followed by pepper and tomato. The larvae dilute their leaves and eat them. In severe cases, the tender stems and leaf buds are often killed and the young plants die. During field and storage, larvae feed on potato tubers and bend into tunnels. When they are severe, they eat empty whole potato squash and shrink and cause rot. It is an international and domestic quarantine target. Prevention and Control Methods I. Strictly enforce the quarantine system: Do not transport planted or unroasted tobacco leaves from the affected area. If necessary, transportation must be fumigated. At room temperature 10 °C ~ 15 °C, with methyl bromide 35 g / m 3 fumigation 3 hours; room temperature at 28 °C above 30 g / m 3 fumigation 6 hours. Carbon disulfide 7.5 g/m3 can also be used and fumigated at 15°C to 20°C for 75 minutes. After fumigation, each insect state can be killed and there is no effect on the development and consumption of the tuber. Second, do a good job of storage during the prevention and control work: clean warehouses, spraying drugs in the crevices of insects, doors and windows, wind tunnel application gauze peg, to prevent adults from the fields moved into the library. The storage seed potatoes are sprayed with 200-300 times of 80% trichlorfon soluble powder or 25% carbaryl wettable powder each, and after cooling, they are transported into the reservoir and stored in 2 or 3 layers. Third, to strengthen the management of the field: the use of insect-free seed potatoes to avoid long-term crops such as potato and tobacco crops. Clean the pasture, combined with cultivating the soil in the cultivator, to avoid the exposure of the potato block to adult oviposits. Fourth, chemical control: in the era of damage to the generation of adults spraying. 50% phoxim EC, 50% Caesarean Loose EC, 40% acephate EC, 80% trichlorfon soluble powder each 1000 times, or 2.5% deltamethrin EC, 20% fenvalerin Emulsifiable concentrates, 2.5% kappa butter, 5% cypermethrin (Laurel) EC, 10% cypermethrin EC, etc. are sprayed at 2,000 times, and 50% Bataan Soluble Powder 100-150g/mu Spray with water.