Winter wheat, autumn, seedling, pest control, prevention and control

Winter wheat in many provinces and cities in China is about to enter the sowing period. The wheat seeding seasoning can effectively reduce the occurrence of pests and diseases in wheat seedlings. The techniques for prevention and control of diseases and insects in autumn seedlings are as follows:

First, to prevent root diseases such as wheat sheath blight and total erosion. The autumn seedling period is the first infection peak of the above diseases, and the prevention at this time can have a multiplier effect. It is recommended that in recent years, there have been plots of wheat sheath blight and total erosion diseases, using 15.5% diniconazole wettable powder 15-20 g or 15% triazolone wettable powder 75 g per acre, 40-40 for water. In kilograms, seedlings are sprayed on the stalks to reduce the incidence in the coming year.

Second, control leaf diseases such as powdery mildew and rust. When the diseased plant rate reaches 10% or more, it is recommended to use oxazolol, triadimefon and other agents for spray control, especially for the prevention and control of wheat stripe rust, to take the prevention and control measures of "taking drugs to detect, discover a little, control one". Disease control is in the early stages of the disease.

Third, prevention and control of wheat, wheat spiders, aphids and other common pests. When the rate of sorghum is more than 5% and the amount of sputum is more than 20, the control should be carried out with 50% anti-Poly or 10% imidacloprid spray. When the single-winged long-winged spider has reached more than 50 heads, it can be sprayed with avermectin and scorpion. For wheat fields with 5 soils, 5 crickets and 10 heads of gray locusts per square meter, they should be treated immediately.

Fourth, reduce the base of pests in the ground. When the rate of dead seedlings in the wheat field is 3% due to underground pests, immediately use 40% phoxim emulsifiable concentrate or 40% methyl isoflavone emulsifiable concentrate 200 to 250 ml per acre and 2.5 kg of water, mix 30~35 kg of fine dry soil. Evenly, stalking wheat ridges to control.

5. Weed control techniques in wheat fields before winter. The best control period of weeds in wheat field is in the 3~6 leaf stage of winter wheat seedlings, and the broadleaf and grass weeds are in the 2~5 leaf stage. To control broadleaf weeds such as sage, sage, maijiagong, and piglet, 10% of phenylsulfuron-methyl WP can be used, and 10 grams per acre or 75% of benzenesulfuron-methyl suspension can be used. 30~50 kg spray with water; 72% 2,4-D butyl emulsifiable concentrate 50 ml per acre, 40-50 kg spray with water. For mixed weeds, 25% oxaloin emulsifiable concentrate 39 ml + 50% acetochlor EC 50 ml can be used.

Pay attention when applying the medicine:

First, the use of 2,4-D butyl ester must use special equipment, while taking care to prevent the liquid from drifting to other crops to prevent phytotoxicity.

Second, on the basis of the correct choice of herbicide types, strictly control the dosage, the best application period and the temperature and humidity requirements of the application. Generally, the application is sunny and has no frost and heavy rain within 4 days. The light is good at noon, the temperature is 10~20Â°C, the best use is available, and the absorption can be basically achieved within 4 hours. The minimum temperature during drug use is generally not lower than 6 Â°C, avoiding the influence of low temperature. It is effective and produces phytotoxicity.

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