Five Mistakes in Pesticide Selection
1, only recognize the reputation of the product name, do not understand the common name and its performance characteristics. As China's pesticides are still in the imitation stage, most of the pharmaceutical products are patented products, and the development of foreign pesticides is also more and more difficult, the number of new varieties appear less and less. After the use of pesticides in one stage, the degree of drug resistance has continued to increase, and the efficacy has declined. People are eager to expect new pesticides to appear, especially one-sided pursuit of exotic varieties. For this reason, some companies have made a big fuss about the names of pesticides for the sake of market competition. They have taken names or names that are irrelevant to pesticides. These unclear names of pesticides have caused people to use pesticides and use them rationally. More difficult.
2, blind mix. Many people in use found that the use of a single agent is not effective, and indiscriminately mixed several agents, and even mixed several agents. As a result, not only did they fail to improve their efficacy, but instead The effect is less than ideal or causes serious injury to the crop, or delays the timing of the prevention and control.
3, one-sided pursuit of quick effect. In the prevention and control of pests and diseases, field investigations should also be taken as guidance, and depending on the occurrence in the field, it is necessary to determine whether or not prevention and control are required. General pests are more sensitive to pesticides in the young larvae stage, and larvae are difficult to control after the third instar. Diseases of plants are also effective when they occur at the beginning. It is often difficult to grasp this optimal timing of prevention and control in production, and to use pesticides for emergency treatment when pests and diseases are seriously endangered. This is a passive drug. After the use of pesticides, it is necessary to have a process of drug efficacy. Generally, the efficacy of pyrethroid insecticides is fast, and the efficacy of specific insecticides is relatively slow. Most users require fast-acting drugs to be effective, and it is unacceptable for the drug to be slow. Therefore, pyrethroids and mixtures containing pyrethroids are welcomed. The main agricultural pests such as Helicoverpa armigera, Spodoptera exigua, and aphids are susceptible to severe resistance to pyrethroids. In most parts of China, the resistance of these three pests to pyrethroid pesticides is very serious. More difficult.
4, improper application of pesticides. The prevention and control of agricultural pests and diseases emphasizes the proper application of medicines and methods. The appropriate method should be selected for the hazards of the pests. For example, the larvae of the beet armyworm are harmed on the foliage in the early evening of the sunny day until 8 a.m. the following day. When the light is strong, they will be concealed and have pseudo-dead. The liquid should be sprayed on the body at the time of the damage to obtain a good control effect. Control of locusts, greenhouse whitefly, whitefly and plant diseases should be directed against the back of the leaf, spraying only on the surface can not control its damage. It is also advisable to spray an easily photolyzable agent such as phoxim in the evening.
5, sprayers generally do not meet the requirements. Investigations from various localities and farmers showed that at present, the qualified rate of agricultural sprayers sold in China is low, quality is poor, and the quality of accessories is poor. There are also certain problems in the use and storage of sprayers by farmers. Therefore, the pesticide waste caused by the leakage of the sprayer and the poor atomization during use is very alarming. Some farmers complain that it is difficult to buy a qualified sprayer. Some people also said that they were afraid to think about fighting drugs, because one fight drug may be washed by liquids, and there is a great possibility of poisoning. To this end, it also called on relevant departments to seriously grasp the quality of pesticides.
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