The wheat ear period is the main period for the occurrence of various pests and diseases, and it is also a critical period for prevention and control. At this stage, there were mainly powdery mildew, rust, and head blight. The main types of pests were ear lice, armyworm, and midge. Prevention and control of pests at the ear stage of wheat should be based on chemical control. In strict accordance with prevention and control indicators, we should select pesticide species on the road, reduce the frequency of application as much as possible, and pay attention to the protection and use of natural enemies to exert their control of pests, and strive to control the hazards of major pests and diseases. At the lowest level, ensure a bumper wheat harvest. 1. Powdery mildew, stripe rust powdery mildew prevention and control index general rate of 10%; stripe rust prevention and control index disease leaf rate of 1% to 2%; control of wheat powdery mildew and rust disease, use 20% chlortetracycline per acre 50 ml, or 15% Triadimefon 75 g. The above-mentioned medicaments all require spraying 50 kg of water. 2. Fusarium head blight spraying protection during the initial flowering period of wheat. Use 50% carbendazim WP 100 gram spray 50 kg of water per acre. Third, the panicle blast prevention and control index 100 spikes amount to 500 heads, and the ratio of natural enemies and wheat bran is less than 1:20. For the prevention and treatment of panicle blast, use 10% imidacloprid wettable powder 10 grams per mu, or 50% anti-inferiority wettable powder 8 to 10 grams. The above two kinds of agents have special effects on aphids and are basically harmless to natural enemies. Fourth, the control index of armyworm has 15 larvae of 3 instars per square meter. Per acre with 20% diflubenzuron suspension 10 grams, or 25% diurea colloidal suspension 30 to 40 grams. 5. Adult control indicators for wheat midge insecticides catch more than 10 adults per 10 recombination nets, or hand-picked wheat ridges, and one can see 2 or 3 head adults take off. To control wheat midge insects, use 25% of agricultural ammomycin 3000 times solution per acre, or 4.5% of high efficiency cypermethrin 1000 times solution, spray all the liquid onto the wheat ears, the amount of drug must be sufficient, not less than 50 per mu. Kilograms of liquid medicine. When several diseases and pests in wheat fields occur at the same time, several pesticides can be mixed and applied according to the required amount to reduce the number of medications. Apply 0.3% potassium dihydrogen phosphate or 0.5% urea according to the amount of liquid to increase the grain weight and increase wheat yield.
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