Wheat bran is one of the major pests currently damaging wheat. In recent years, due to changes in climatic conditions, the reduction of natural enemies and improper control measures in wheat fields, the damage of wheat mash has become increasingly serious, resulting in reduced wheat yield and quality. In view of the situation of farmers controlling wheat stubble, the Chinese pesticide net Xiaobian introduced the following three measures to improve the control effect of wheat bran.
According to the prevention and control indicators, it is determined whether the prevention and control index of wheat stubble is 500 heads of aphids. As long as the plots that meet the control indicators should be used immediately. According to the prevention and control indicators, it can not only effectively control the damage of wheat stubble on wheat, but also achieve the purpose of saving medicine and labor. Do not wait for the wheat bran to be covered with wheat ears before starting to control, otherwise it will affect the control effect due to late control.
Alternate use of drugs to reduce the resistance of wheat aphid commonly used a pesticide will make wheat bran resistant to the pesticide used, so that the control effect is worse. It is recommended to use 40% green killing 40g per acre, or 2.5% cypermethrin 25g, or 3% acetamiprid 50ml in the early stage of aphid occurrence; 50% anti-converse wettable powder in the middle and late stage of aphid occurrence 8-10 grams, or 20-30 grams of 10% imidacloprid wettable powder. The above agents have special effects on aphids, and are basically harmless to natural enemies of aphids, and the alternate use can significantly improve the control effect.
Appropriately increase the amount of water. Some farmers apply medicinal water unscientific. For example, the pesticide in the wheat aphid of 1 mu of land is added to 1 sprayer water (about 15 kg of water for a mister), and the solution is not uniform. It is sprayed on all the plants in the wheat field, causing the aphids on the plants that have no medicine or less medicine to continue to survive and reproduce, causing secondary harm. The water consumption should be appropriately increased in combination with the application device, and the water consumption per mu should be no less than 50 kilograms by hand sprayer, and the water consumption per mu should be no less than 40 kilograms with the electric knapsack sprayer, and the water should be applied with the mobile mister. The amount is not less than 20 kg, and it must be sprayed evenly up and down to ensure the control effect.
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