According to the forecast of the National Climate Center, the temperature in most of the country's wheat regions is close to normal or high during the period from March to May this year, and the temperatures in Huanghuai Wheat District in the northern part of Henan are significantly higher, which is conducive to the increase of populations of insect pests such as aphids and wheat spiders. Most of the country's precipitation in the wheat region is close to normal or more than usual, and precipitation is 2-5 percent higher in the southeast of Henan. It is beneficial to the development of diseases such as head blight, stripe rust, sheath blight, and powdery mildew, such as wheat heading and flowering. Over 2 days of rainy weather can easily lead to outbreaks of scab. In order to ensure pest prevention and control, increase production and increase income, the agricultural sector has issued guidance on the prevention and control of wheat pests and diseases, and specifically defined the measures for drug use.
In the jointing period of wheat - returning to the green period, the main control objects are stripe rust, powdery mildew, sheath blight, red spider and underground pests. When a variety of pests and diseases are mixed, “one spray and multiple defenses†can be adopted. The control agent can use triazole bactericides, acetamiprid, imidacloprid, and anti-influx insecticides to mix and spray.
In wheat booting stage - flowering stage, the main control objects are aphids, midges, scab, powdery mildew, spider mites and stripe rust. When a variety of diseases and insect pests were mixed, the "one spray and three defenses" technology was implemented. When a single pest occurs in the field, targeted prevention and treatment is carried out. In the wheat field from the heading of wheat in the south of Huanghuai to the flowering period, great attention must be paid to the prevention of head blight. In the event of rain, dew, and foggy weather lasting more than 3 days or more than 5 days of rainy weather within 10 days, the prevention of head blight must be fully carried out, and cyanogenic fungi, tebuconazole, prochloraz, can be used. Carbendazim, thiophanate-methyl and other fungicides.
Stripe rust and powdery mildew: When the rate of leafy rust disease in the field reaches 0.5%-1%, when the rate of diseased leafy mildew reaches 10%, a large area of ​​emergency prevention and control is promptly organized, and the triazole bactericide can be used as the control agent.
Fusarium head blight: In the event of rain, dew, and foggy weather from the heading to the flowering stage of wheat, and more than 5 days of overcast weather in more than 3 days or 10 days, the prevention and control of head blight must be fully implemented; , The first application time is earlier than the heading date. The drug species can be sprayed with cyanoxime, diterpenin, tebuconazole, prochloraz, carbendazim, and the like. After raining within 3-6 hours after application, the rain should be promptly treated. In areas where resistance to carbendazim is caused by Fusarium head blight, benzoylimidazole such as carbendazim should be discontinued.
Wheat sheath blight: When the diseased strain rate reaches 10%, Jinggangmycin, triazole and other fungicides are used to spray the base of the stems of the wheat seedlings, spraying once every 7-10 days, and spraying 2-3 times.
Midge: There are at least 1 midge insects per 10 yellow plates or white boards (120mm100mm) at the beginning of wheat heading, or at the heading stage of wheat, 10-25 adult insects per 10 reticulons at the heading stage of wheat, or by hand to open the ridges. When 2-3 adult insects can be seen, they can be treated with beta cypermethrin or chlorpyrifos, and they can also be used to treat pests such as wheat maggots and armyworms. When there are six spider mites on average per plant, sprays such as avermectin and bufalin can be used. Replant the area of ​​midgeworms, make full use of the potency of the pesticides, advance the control time appropriately, and use drugs during the main peak period of adult emergence.
Insect mites: For areas with severe panicle blast, when the ratio of the hazard to harm is less than 1:150 when the 100-plant stubble volume in the field reaches 500-800, the pesticides such as acetamiprid, imidacloprid, and anti-indolyl can be used according to the pesticide package. Describe the recommended dose spray control.
Red spider: When there are 6 rods per plant, it can be controlled by spraying with avermectin, bufalin, and bupropion.
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