Chemical weeding in farmland not only saves time, but also has high efficiency, so it is very popular among farmers. However, in agricultural production, crops are often subjected to phytotoxicity due to unreasonable use, resulting in different degrees of loss. Therefore, chemical weeding must be cautious to prevent phytotoxicity. The pesticide network Xiaobian recommends that you pay attention to the following points: Pe Shopping Basket With Handle,Shopping Basket With Handle,Lady Shopping Basket,Felt Shopping Basket Haixing Plastic & Rubber Co., Ltd. , http://www.plastic-container-storage.com
1. Choose the right medicine. The choice of herbicides should not only consider the herbicidal effect, but also ensure the safety of crops, and there is no residual phytotoxicity to the crops in the future, so as to avoid adverse consequences. For example, after the use of metsulfuron-methyl herbicides in wheat fields, crops such as cotton, sesame, and beans cannot be grown.
2. Strictly control the dosage. For the application of herbicides, pesticides should be used strictly in accordance with the regulations, and should not be excessive. In particular, it is necessary to clarify the difference between the quantity of the product and the active ingredient, and the two cannot be confused. The concentration of the herbicide sprayed should not be too large to avoid exceeding the tolerance of the crop. When determining the dosage, it should also be applied to the soil and the local conditions. The mineral soil should be less than the weight of the heavy soil.
3. Determine a reasonable application period. Determine the reasonable application period to adhere to the "three look": a look at the sky, low temperature, cold weather, high temperature, high humidity, strong wind and Other adverse weather is not suitable for application of herbicides; second look at the ground, dry land lack of need to fight drought first Medicine, paddy fields need to have an appropriate amount of water; three as objects, should not be applied during the sensitive period of crops.
4, to ensure the quality of the application. Whether spraying, toxic soil or other application methods, it must be applied evenly. Spraying must also be carried out in strict accordance with the concentration specified in the drug. When using the toxic soil method, the soil should not be dried too much to avoid the separation of the soil. When dispensing, first mix the standard agent with a small amount of moist fine soil, mix well with all the fine soil, and pile up for 4-5 hours. After the orchards, tea gardens, nurseries, sugar cane fields and field crops have grown to a certain height, a directional spray method should be adopted to spray the liquid on the weeds to avoid spraying on the stems and leaves of the crops. Take the soil treatment method, pay attention to the quality of the land preparation, leveling and fine, avoiding unevenness.
5, a reasonable mix. It is necessary to pay attention to whether the two agents are synergistic or antagonistic, and a compatibility test should be done before mixing. If flocculation, precipitation, condensation, etc. occur, it should not be mixed. Generally, the amount of the same type of herbicide after mixing should be one-half to one-third of the amount of each of the two herbicides alone, and must not exceed the amount used alone, otherwise it is not safe for the crop. When herbicides are mixed with chemical pesticides, they should also be based on the principle of no phytotoxicity.