1. Only recognize the reputation of the product name, do not understand the common name and its performance characteristics. Since China's pesticides are still in the imitation stage, most of the pharmaceuticals are patented products, and the development of foreign pesticides is becoming more and more difficult, and the number of new varieties is becoming less and less. After the use of pesticides in one stage, the degree of drug resistance is continuously improved, and the efficacy of the pesticides is declining. People are eagerly awaiting the emergence of new pesticides, especially the ones that are singularly famous. To this end, some companies have made a fuss about the name of pesticide products in the light of market competition, taking some names or names that are not related to pesticides. These ambiguous names of pesticides have brought people to choose pesticides and rational use. More difficult.
2. Blindly mixed. Many people find that the single use of a certain agent is not ideal, and it is indiscriminate to mix several kinds of agents, and even mix several kinds of mixtures. As a result, not only does it not achieve the purpose of improving the efficacy, but instead Less effective or serious phytotoxicity to crops, or delay in prevention.
3, one-sided pursuit of quick-impact. In the prevention and control of pests and diseases, field surveys should also be used as a guide to determine whether or not prevention is needed depending on the occurrence of the field. Generally, pests are more sensitive to pesticides in the younger larval stage, and it is difficult to control the larva after 3 years of age. The disease of plants is also good at the beginning of the control. It is often difficult to grasp this optimal control opportunity in production, and use pesticides to provide first aid when pests and diseases reach serious harm. It is a passive drug. After the pesticide is used, there is a process to exert its efficacy. Generally, the pyrethroid insecticides exert their effects quickly, and the specific insecticides exert a slower effect. Most users require high potency of the drug and it is difficult to accept the slow effect. Therefore, pyrethroids and pyrethroid-containing mixtures are welcomed. Because the main agricultural pests such as cotton bollworm, beet armyworm and aphid are very resistant to pyrethroids, the resistance of these three pests to pyrethroid pesticides is very serious in most areas of China. More difficult.
4. Improper application method. The prevention and control of agricultural pests and diseases emphasizes proper symptomatic application and methods. Appropriate methods should be selected for the site of the pest. For example, the larvae of Spodoptera exigua are harmful on the leaf surface in the evening from sunny evening to 8:00 am the next day. When the light is strong, it will be concealed and pseudo-dead. Spray the liquid on the insect body at the time of the hazard to obtain good control effect. Prevention and control of aphids, greenhouse whitefly, whitefly and plant diseases should be sprayed on the back of the leaves, and only spraying on the surface can not control them. Spraying phoxim and other photolytic agents should also be carried out in the evening.
5, sprayers generally do not meet the requirements. From local surveys and farmers' reflections, at present, the agricultural sprayers sold in China have a low pass rate, poor quality, and poor quality parts. Farmers have certain problems with the use and storage of sprayers. Therefore, the waste of pesticides 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 would be afraid to fight drugs, because they could be washed by liquid medicine and the possibility of poisoning was great. To this end, the relevant departments are also called upon to seriously grasp the quality of pesticide equipment.
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