Wheat bush dwarf disease is also called "slope disease". In the past five years, the disease has reached the level of natural control. However, some parts of the wheat in this spring, especially near the complex environment, such as roads, trees, river ditch and small blocks of wheat fields, have appeared in the re-emergence area of ​​local wheat bush dwarf disease. Therefore, in this autumn wheat sowing stage, we must do a good job in the comprehensive prevention and control of wheat virus disease.
1. Eliminate the source of poison and pass the poisonous fly ash. Wheat bush dwarf virus not only harms wheat and corn, but also harms a variety of grass weeds. Eliminating the source of poison and passing on the gray planthopper are the main measures to control the disease. At present, it is the spawning stage of the Laodelphax striatellus. Farmers must seize this critical stage in early September to remove weeds, reduce the source of poison, and lower the base of the gray planthopper. In addition to the removal of weeds, 20% paraquat can be used, and 100 ml of water is sprayed per barrel of water (about 15 kg, the same below).
2. Continuous planting. Promote the contiguous cultivation of wheat into small pieces, reduce the planting of small plots, and create an environment that is not conducive to the survival of Laodelphax striatellus.
3. Grasp the critical period and control the gray planthopper. After sowing wheat, it is the key to control the gray planthopper. The general wheat field is controlled by four weeks, and the width of the control is 3 to 5 meters, and the surrounding environment is used as a medicine; small wheat fields or strip fields should be used in the whole field. The first time of the drug is 50% in the emergence of wheat, spray once every 5 days, continuous control 2 to 3 times of drug dosage per barrel of water plus 10% imidacloprid 15 grams, 4.5% beta-cypermethrin 30 ml, or barrel water Add 40% omethoate 30 ml spray.
1. Eliminate the source of poison and pass the poisonous fly ash. Wheat bush dwarf virus not only harms wheat and corn, but also harms a variety of grass weeds. Eliminating the source of poison and passing on the gray planthopper are the main measures to control the disease. At present, it is the spawning stage of the Laodelphax striatellus. Farmers must seize this critical stage in early September to remove weeds, reduce the source of poison, and lower the base of the gray planthopper. In addition to the removal of weeds, 20% paraquat can be used, and 100 ml of water is sprayed per barrel of water (about 15 kg, the same below).
2. Continuous planting. Promote the contiguous cultivation of wheat into small pieces, reduce the planting of small plots, and create an environment that is not conducive to the survival of Laodelphax striatellus.
3. Grasp the critical period and control the gray planthopper. After sowing wheat, it is the key to control the gray planthopper. The general wheat field is controlled by four weeks, and the width of the control is 3 to 5 meters, and the surrounding environment is used as a medicine; small wheat fields or strip fields should be used in the whole field. The first time of the drug is 50% in the emergence of wheat, spray once every 5 days, continuous control 2 to 3 times of drug dosage per barrel of water plus 10% imidacloprid 15 grams, 4.5% beta-cypermethrin 30 ml, or barrel water Add 40% omethoate 30 ml spray.
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