First, transform rice fields and reduce pesticide leakage. The loss of pesticide leakage in paddy rice fields can reach more than 50%. Although the proportion of the area is not high, it cannot be ignored. Infiltration of paddy fields should not be rice, should be changed to dry farming. Second, the implementation of water-saving irrigation, control of drainage time. Active drainage is an important way for the loss of water-soluble pesticides in paddy fields, and it is of great significance to reduce such losses. According to the actual situation of each place, water-saving irrigation techniques should be promoted according to local conditions, such as fixed irrigation, moist irrigation, shallow irrigation with shallow irrigation, and dry water before and after, so as to reduce the time and volume of water in the paddy fields, paddy fields and water. After the application of pesticides, it is necessary to control the drainage time and strive to not drain the water within 3 days, so as not to drain the paddy field water containing high concentration of pesticides into the water body. Third, optimize the pesticide species, use less water-soluble drugs. Optimize the structure of pesticides used in rice fields, and gradually reduce the amount of water-soluble pesticides. Insecticides, insecticides, etc. are the main pesticides used by paddy fields to control insect pests such as rice leaf roller, leaf borer, and stem borer, and they are all water-soluble pesticides. In recent years, insecticide monosodium substituted methamidophos as the main insecticide used in rice fields in southern Shandong. Due to continuous use for many years and repeated use in one season, the efficacy of pesticides has been reduced and the dosage has increased. From the perspective of protecting the water environment, delaying pest resistance and reducing toxicity, it is necessary to reduce the use of these two pesticides and reduce the number of uses in one season, and replace them with other pesticides. The current pesticide market creates conditions for this alternative. Fourth, monitor pesticide residues and know the extent of pollution. It is necessary to monitor pesticide residues in groundwater and surface water during the application period to determine the actual pollution degree of water-soluble pesticides in the rice cultivation area where a large number of water-soluble pesticides are used. V. Avoid spraying before rain and reduce runoff. The loss of rainfall trails of pesticides mainly occurs within 0-3 days after pesticide application. Therefore, proper understanding of weather forecasting and avoiding spraying before heavy rainfall are the key to preventing the loss of agricultural runoff. In addition, appropriate increase in the height of rice field stubble can reduce the amount of paddy field water overflowing the field; reasonable use of detergents and other wet spread agents can increase the amount of pesticides retained by rice plants, can increase control efficiency and reduce the amount of pesticides into the paddy field water, and then reduce runoff . Spice Novelties Co.,Limited , https://www.wholesale-adult-toys.cn
Rice fields need to prevent the loss of pesticides
The use of water-soluble pesticides in paddy fields results in loss of percolation, loss of rainfall runoff, and loss of active drainage, which can be as high as 50% in the early stages of rice growth. Due to the large paddy area and the large amount of water-soluble pesticides, the loss of pesticides in paddy fields has become a major problem in the pesticide-polluted water environment and must be highly valued.