In vegetable production, it is often necessary to fight drugs and prevent various diseases and insect pests. How to correctly use pesticides? What should be noted during use?
First, the basic number to clear
Be sure to grasp the physical and chemical properties of the pesticides used, the objects to be controlled, and the precautions. Each pesticide has its own chemical characteristics, applicable conditions, control range, and targets for prevention and control. Each control object (pest, weeds and weeds) has its law of occurrence and development. Its weak links are the best time for us to use drugs. That is, control period. Be aware and targeted.
Second, symptomatic medication
The types of pesticides are various, including fungicides, insecticides, herbicides, and plant growth regulators. When purchasing pesticides, it is important to pay attention to "prescription for remedy." In addition, insecticides and bactericides are also varied in species, and as many pests as possible are selected.
Third, timely medication
People often hear people complain about more counterfeit medicines and lower efficacy. In fact, many pesticides are not fake or poor. Only the wrong time has not been achieved. Each pest and disease has its critical period of prevention and control. If medicines are used at the right time, they can do more with less. If they are missed, it will be difficult to achieve the desired results. Other farmers' friends think that the higher the temperature, the better the efficacy, and often choose to use medication at noon. As everyone knows, at this time, many insect pests have been hidden due to their fear of heat, and their effectiveness has been reduced by drugs. Moreover, most pesticides are easily decomposed at high temperatures, and high-temperature operations can also easily cause poisoning accidents among workers.
Fourth, the amount of medication
People tend to administer pests, and think that the greater the amount of medicine, the better. Although the small amount of drugs can not be effective, but the large amount of drugs, in addition to human waste, but also prone to injury and human and animal poisoning accidents. If herbicides are used, their concentration requirements are very strict, and they must be properly proportioned according to the prescribed doses. If they are careless, they will die. Therefore, it must be based on the growth of the crops and the degree of occurrence of pests and diseases, appropriate ratio, and reasonable use. Under normal circumstances, crops are prosperous, when pests and diseases are severe, the amount of pesticides is small, and when the occurrence of pests and diseases at the seedling stage is light, the amount of pesticides is small.
Fifth, the method should be properly
According to different pests and diseases, choose different control methods, such as seed dressing, poisoning baits, stem coating, dusting, spraying, etc. For the prevention and control of underground pests, the method of spraying poison baits is generally adopted, and the method of selecting and spraying stems is selected for the diseases of stems. But no matter which method you choose, medication must be uniform and thoughtful.
Six, alternating or mixed medication
Using a single pesticide for a long period of time, the pests are susceptible to drug resistance. The vegetable farmer should use two or more kinds of pesticides at the same time according to different pests, or alternately use two or more pesticides according to the characteristics of the pesticide, which can effectively delay the occurrence of drug resistance.
Seven, pay attention to the protection of natural enemies
Each pest has its natural enemies. For example, the seven-spot ladybug is the killer of the aphid. When the scoop and beryllium ratio is not less than 1:150, it is not necessary to use drugs to prevent and treat it. In addition, when pests are controlled, selective pesticides should be used as much as possible so that the selected pesticides are effective only for pests, so that natural enemies can be well protected and pest control effects can be achieved. Biological control can not only reduce costs, be safe and effective, but also improve the quality of agricultural products.
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