Recently, winter wheat in Beijing has entered the greening period, and the pests and diseases of wheat fields have also entered the multi-day season. It is necessary to pay attention to the prevention and control of wheat sheath blight, powdery mildew, red spider, midge, and wheat.

Sheath blight with 25% enemies 20 to 30 ml per acre, 12.5% ​​hectare WP 20-30 g or 15% triazolone wettable powder 80 g, 50 liters of water sprayed on the base of the stem Re-medicate 7 to 10 days after necessary.

The rate of powdery mildew in the heading stage of wheat at the heading stage is 15%~30% or the rate of diseased leaves is 8%~15%. You can choose 20% triadimefon emulsifiable concentrate 40ml or 15% triazolone wettable powder 50g. 40 liters of water spray.

When the red stalk has a single line of 33 cm and has 200 worms, the red spider can be used for drug control. Applying 1.8% worm emulsifiable concentrate 5000~6000 times liquid, 15% 哒螨灵乳油 2000~3000 times liquid, 20% chlorophyll (aphid + phoxim) emulsifiable concentrate 3000~4000 times solution.

The larvae are sprayed with 50% phoxim emulsifiable concentrate 200 ml and water 5 kg per acre into 20 kg of fine soil and mixed to make toxic soil. When the wheat is pulled at the jointing stage, it is applied to the wheat field, which can kill a part of the cockroach and rise to Larva of the soil surface. At the heading stage, 10% imidacloprid 20~30g or 4.5% beta-cypermethrin emulsifiable concentrate 30g with water 20kg spray is used to control adults.

When the mites have more than 500 cockroaches, 50% anti-Pu Wei WP can be used, 10~15 grams per mu, 10% imidacloprid wet emulsion 15~20 grams or 3% acetamiprid emulsifiable concentrate, 20~30 ml per mu. 20 liters of water was evenly sprayed to control the wheat bran.

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