Pay attention to the control of diseases and insect pests in the period of wheat turning green

Winter wheat has entered the green period one after another, and wheat field diseases and insect pests have also entered the frequent season. Attention should be paid to the prevention and control of wheat sheath blight, powdery mildew, red spiders, midges, wheat aphids and other diseases and insect pests. Sheath blight per mu with 25% enemy demulsifiable oil 20g 30ml, 12.5% WP 20g 30g or 15% triadimefon WP 80g, 50 liters of water sprayed at the base of the stem, it is necessary to use again every 7 to 10 days. Powdery mildew at the booting and heading stage of wheat, when the diseased plant rate reaches 15% to 30% or the diseased leaf rate to 8% to 15%, 20% triadimefon EC 40 ml or 15% triadimefon wettable powder 50 g, 40 liter spray with water. Red spiders can be treated with pesticides when there are 200 insects in a single row of 33 cm in wheat ridges. 1.8% mites EC 5000 / 6000 times, 15% chlorpromazine EC 2000 / 3000 times and 20% chlorpromazine (acaridin + phoxim) EC 3000 times were applied. The trematode is mixed with 50% phoxim EC 200ml plus 5 kg water per mu and sprayed into 20 kg fine soil to make poisonous soil. when the trematode is spread on the wheat field at the jointing stage of wheat, it can kill part of the pupae and the larvae rising to the soil surface. At heading stage, 10% imidacloprid 20g / mu or 4.5% cypermethrin EC 30g / mu and 20kg / mu were sprayed to control adults. When the number of aphids is more than 500 aphids, 50% aldicarb wettable powder 10 g / mu, 10% imidacloprid wettable emulsion 15 g / mu or 3% acetamiprid EC 20 ml / mu, 20 liters of water can be evenly sprayed to control wheat aphids.