First, the wheat aphid The main aphids of wheat are wheat birch, wheat long tube and grass tube. Adult nymphs or nymphs are harmful to seedlings until the wheat matures. At the seedling stage, most of the wheat aphid was concentrated in the leaf back, leaf sheath and new leaves, sucking the juice, and then turning to the ear after the heading, and the amount of insects increased greatly during the filling stage. The leaves may appear yellow and white spots, and even the whole leaves are yellowed and dead. There are two pre-week periods in the pre-winter seedling period and before heading.
Control method: 11.5% dimethoate or 1.5% 1605, 1.5-2.0 kg spray per acre. 240% dimethoate 1000-1500 times liquid, 60-75 kg spray per acre. 3 ultra low volume spray. 60 ml of 25% dimethoate per acre. 450% 蚜 蚜 ( 蚜 蚜 蚜 蚜 蚜 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 5 Protection uses natural enemies to control. The natural enemies of wheat stubble include ladybugs, cockroaches, and cockroaches. In some years, they are large in number and can be used to prevent wheat worms.
Second, the wheat straw fly From the seedling stage to the early stage of heading, the larvae of the wheat worm can cause damage to the stalk. Jointing to picking the flag for the spawning period. Larvae can cause dead seedlings at the seedling stage. At the booting stage, the young ears are fed into the tender tender ear to cause bad ears. At the beginning of heading, the young stems of the base of the feeding ear are intruded to form dead white ears.
Control methods: 1 adjust the sowing date, appropriate early sowing to avoid the damage period. 2 use insect-resistant varieties. Breeds with short growth period, strong tillering power, and hairy and narrow leaves are lightly affected. 3 chemical control. It can be sprayed with 50% 1605 emulsifiable concentrate 5000 times, 50 kg per mu, can kill adult and eggs; or 2.5% trichlorfon powder, 1.5-2.0 kg per acre before the wintering period of adult growth. , effective for adults. In the future, every 6-7 days, the insects will be sprayed once more.
Third, the wheat red spider The wheat red spider includes two kinds of long-legged spiders and wheat spiders. The seedlings are mainly caused by adults and nymphs. Sucks the sap of the wheat leaf, causing the leaves to turn yellow and even dead. It is usually more harmful in the back of the leaf, and is transferred from the lower leaf to the upper leaf. In severe cases, the whole plant is visible.
Control methods: 1 Both types of wheat spiders have the characteristics of suspended animation and hidden in the soil seam, combined with irrigation, shaking and killing. 2 Deep tillage and weeding, clean the fields, and eliminate the summer eggs. 3 dusting. 1.5% dimethoate or 1.5% 1605 powder, 1.5-4.2 kg per acre. 4 spray. 50% 1605 EC 3000-4000 times liquid or 50% triclosan 1500-2000 times liquid or 40% omethoate EC 1500-2000 times liquid, not less than 30 kg per mu.
Control method: 11.5% dimethoate or 1.5% 1605, 1.5-2.0 kg spray per acre. 240% dimethoate 1000-1500 times liquid, 60-75 kg spray per acre. 3 ultra low volume spray. 60 ml of 25% dimethoate per acre. 450% 蚜 蚜 ( 蚜 蚜 蚜 蚜 蚜 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 5 Protection uses natural enemies to control. The natural enemies of wheat stubble include ladybugs, cockroaches, and cockroaches. In some years, they are large in number and can be used to prevent wheat worms.
Second, the wheat straw fly From the seedling stage to the early stage of heading, the larvae of the wheat worm can cause damage to the stalk. Jointing to picking the flag for the spawning period. Larvae can cause dead seedlings at the seedling stage. At the booting stage, the young ears are fed into the tender tender ear to cause bad ears. At the beginning of heading, the young stems of the base of the feeding ear are intruded to form dead white ears.
Control methods: 1 adjust the sowing date, appropriate early sowing to avoid the damage period. 2 use insect-resistant varieties. Breeds with short growth period, strong tillering power, and hairy and narrow leaves are lightly affected. 3 chemical control. It can be sprayed with 50% 1605 emulsifiable concentrate 5000 times, 50 kg per mu, can kill adult and eggs; or 2.5% trichlorfon powder, 1.5-2.0 kg per acre before the wintering period of adult growth. , effective for adults. In the future, every 6-7 days, the insects will be sprayed once more.
Third, the wheat red spider The wheat red spider includes two kinds of long-legged spiders and wheat spiders. The seedlings are mainly caused by adults and nymphs. Sucks the sap of the wheat leaf, causing the leaves to turn yellow and even dead. It is usually more harmful in the back of the leaf, and is transferred from the lower leaf to the upper leaf. In severe cases, the whole plant is visible.
Control methods: 1 Both types of wheat spiders have the characteristics of suspended animation and hidden in the soil seam, combined with irrigation, shaking and killing. 2 Deep tillage and weeding, clean the fields, and eliminate the summer eggs. 3 dusting. 1.5% dimethoate or 1.5% 1605 powder, 1.5-4.2 kg per acre. 4 spray. 50% 1605 EC 3000-4000 times liquid or 50% triclosan 1500-2000 times liquid or 40% omethoate EC 1500-2000 times liquid, not less than 30 kg per mu.
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