å’‹ Anti-wheat wheat stalk fly

A. The wheat aphids that damage wheat mainly include wheat bifurcation, wheat long tube aphid and axillary tube aphid. Adults or nymphs of wheat aphids are harmful to seedlings until the wheat matures. During the seedling stage, the wheat bran was mostly concentrated in the dorsal leaves, leaf sheaths and new leaves. The sap was sucked, and was transferred to the panicle after heading for damage. The amount of insects in the filling stage was greatly increased. Yellow and white spots may appear on the leaves, and even whole leaves yellow. Pre-winter seedlings and headings have two prosperous periods. Control methods: 11.5% dimethoate or 1.5% 1605, spray 1.5-2.0 kg per mu. 240% Dimethoate EC 1000-1500 times, spray 60-75 kg per mu. 3 ultra low spray. 25% Dimethoate EC per acre 60 ml. 450% Piping fog (anti-Wei Wei) WP 2000-2500 times, 75-100 kg per acre spray liquid. 5 Protection Use natural enemies to control harm. The natural enemies of wheat aphids are ladybugs, aphid bees, and ticks. They occur in some years and can be used to prevent wheat aphid pests. 2. From the seedling stage to the earliest stage, wheat fly larvae can cause damage to the stem. From jointing to picking the flag for spawning. Larvae can cause dead hearts in the seedling stage. In the booting stage, feeding into the tender tender section of the tender spike causes bad ear. At the beginning of the heading, the spikelets at the base of the feeding spike were cut to form dead white spikes. Control methods: 1 regulate the sowing date, appropriate early sowing to avoid the damage period. 2 selection of insect-resistant varieties. The species with short growth period, strong tillering ability, and hairy and narrow leaves suffer less. 3 chemical control. It can be sprayed with 50% 1605 EC 5000 times, 50 kg per mu to kill adults and eggs, or 2.5% trichlorfon powder, 1.5-2.0 kg per mu after mass production. It is effective for adults. Afterwards, spray the insects once every 6-7 days. Third, wheat red spider Mai wheat spiders include wheat leg spider and Maiyuan spider two. Primarily adult and nymph-infested seedlings. The sap of wheat leaves is sucked to make the leaves yellow and even die. It is usually damaged in the back of the leaf and is transferred from the lower leaf to the upper leaf. When the leaf is severe, the whole plant is visible. Control methods: 1 Both kinds of wheat spiders have a pseudo-dead nature and hidden habits in the earth seam, combined with irrigation, shake off and kill. 2 Deep plowing and weeding, cleaning fields, and eliminating over summer eggs. 3 spray powder. 1.5% dimethoate or 1.5% 1605 powder, 1.5-4.2 kg per mu. 4 spray. 50% 1605 EC 3000-4000 times solution or 50% trichlormethonone 1500-2000 times solution or 40% omethoate EC 1500-2000 times solution, not less than 30 kg per mu.

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