Generally speaking, farmer friends have sprayed a lot of pesticides. If one of them is not spraying, he may be in a hurry with you. However, in fact, there are not many people who can actually apply science to pesticides. Spraying?
1. Grasp the timing of spraying.
It is common for vegetable farmers to be accustomed to spraying once every three or four days, thinking that they can sit back and relax. In fact, this method is very wrong. Not only does the cost increase, but also the use of the drug is particularly likely to cause a rapid increase in the resistance of insect pests, so that they cannot be controlled at large. A reasonable method is to use drugs at the initial stage of pests, and it is recommended to spray protective fungicides on a regular basis. At the beginning of the disease, a symptomatic therapeutic bactericide was taken according to the type of disease.
2. The appropriate amount of liquid.
The more liquid is not better. Usually, farmers often ask me to spray a few barrels of water per acre when spraying. This is actually a problem that cannot be answered. The most reasonable amount of spray is the amount of water that is sprayed onto the leaves when it is sprayed, but it is just not drip. good. Scientific experiments show that if the droplets are sprayed on the leaves, the remaining amount of liquid on the leaves is only about half that of the liquid on the leaves. Therefore, when it is sprayed on the drip, it will not only result in a large amount of waste, but also the actual control effect is large. discount. Some vegetable farmers are also accustomed to spraying liquids, and their drug concentration is very high. This is unscientific because it is not only prone to phytotoxicity, but also has a serious phenomenon of missing spray, and it does not spray targets. The control effect is not ideal.
3. The correct spray location.
The spray control objects are different, and the spraying positions are different. If pesticides such as thrips, aphids, and whitefly are to be sprayed, young plants or middle and upper parts of plants should be sprayed. If common diseases are to be prevented, the middle leaves of the middle and lower parts of the plant should be sprayed to control the disease. Diseases such as fall disease, blight, and wilt disease should focus on spraying the stem base.
4. Liquid preparation
When preparing the liquid, it is recommended that you use the second dilution method, that is, dissolving the pesticide in a small amount of water first, and then adding water after being even, so that the medicine can be dissolved in the water more evenly and the effect is better.
5. Pesticide mixing sequence.
If spraying multiple pesticides at one time, such as pesticides, fungicides, foliar fertilizers, etc., we must remember that when formulating liquid medicines, we must first add foliar fertilizer, and then add the powder dosage form to kill or kill. Insecticide, the last addition of pesticide formulations of pesticides. In this order, the efficacy of the drug is less affected. Conversely, it may have a great impact on the efficacy of various pesticides, or even failure.
6. Spray method.
If you use a manual sprayer, it is best to spray directly on the blade. If you use a mist sprayer or a high pressure electric sprayer, spray it forward parallel to the top of the plant. If you are spraying on the plant, you will have a lot of liquid spray. The ground, causing waste. Spray insecticides, fungicides are generally people stand on the uptake, spray the front side or just spray the left or right side, and spray herbicides, especially the closed type of herbicide is generally the reverse spray, to destroy the film.
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