What is wheat midge?

What is a wheat trematode? What are the hazards of wheat trematodes? Is there any way to prevent and cure it? Also ask netizens to help introduce the harm and control methods of wheat trematodes in the farming network, which are listed below for netizens' reference. The harm of wheat midge: wheat midge is a worldwide pest. It belongs to Diptera, Culicidae. The length of female adult is 2-2.5 mm, that of male is 1.5-2 mm, and that of larva is 2-3 mm. Wheat trematodes do great harm, resulting in a 10% reduction in wheat yield by 50%, a reduction of more than 80% in serious plots, or even a total yield. Generally, the larvae drill into the wheat grains to suck the juice, and the wheat grains damaged by the wheat midge are necrotic, resulting in empty chaff and losing the edible value of the wheat grains. Wheat trematodes are resistant to low temperature and high temperature, and the larvae die when the temperature reaches 50 ℃. The larvae like to be wet and afraid of dryness. The larvae can still survive if they are soaked in water for 20 days, while they will die after being mixed with dried wheat grains for more than 10 days. The control methods of wheat midge: method 1. The control of wheat trematode with poisonous soil at jointing and booting stage, which is the key period for the control of wheat midge. You can use 150 milliliters of 40% methyl isomaliphate or 50% phoxim EC, 5 kg of water, spray on 20 kg dry soil, mix well to make poisonous soil scattered on the surface, paddle hoe, mix the poisonous soil into the topsoil layer, and kill larvae. You can also use 3% isosalidophos granules or 0.04% insecticidal powder or 4.5% methamphetamine powder or 4% diphacinone powder 2 kg, mixed with fine soil 30 kg, sprinkle on the surface of the wheat field, hoe, and mix the poisonous soil into the topsoil layer. The effect of watering can also be better after spraying. Method 2. Spray control of wheat at heading stage, which is mainly to control adults. It can be sprayed with 50% phoxim EC, 40% omethoate EC, 80% dichlorvos EC, 36% mites EC 1000-1500 times or 2.5% deltamethrin EC, 20% fenpropathrin EC 4000 times, or 2% dimethrin powder or 2% carbaryl powder 2 kg powder spray. Click to get more wheat planting technology click to get more grain planting technology