If you say that a farmer will not spray medicine, it is just like saying who is a layman! In fact, there are not many people who can really do scientifically spray pesticides. How do you spray them scientifically? How much water should a bottle of pesticides be? Many farmers are still not very clear. Recently, Xiaobian discovered an easy-to-understand pesticide dosage form, and the comparison form quickly found the required dose.
The number in the pink area is the amount of water exchanged; the number in the yellow area is the amount used; the number in the green area is the dilution factor. It's very convenient to find. You only need to compare the horizontal row and the vertical column of the table to find the number at the intersection to know the dose.
For example, if we need to prepare a diluted drug that is 3000 times diluted and we need to weigh 60 pounds of water, then we will find the number 3000 times from the leftmost side, and then find 60 pounds in the upper right water volume to find the crossed number. The amount of the required dose can be obtained, which is 10 ml or 10 g.
In addition, scientific spraying of pesticides requires mastering the following principles:
Grasp the timing of spraying
It is common for vegetable farmers to get used to spraying medicine for three or four days, thinking that they can sit back and relax. In fact, this method is very wrong, not only the cost is increased, but also the drug is particularly prone to cause rapid increase in pest resistance, so that it cannot be controlled when it occurs.
A reasonable method is to use the drug at the beginning of the pest, and the disease is recommended to spray a protective fungicide on a regular basis. At the beginning of the disease, a symptomatic therapeutic fungicide is taken according to the type of the disease.
Suitable amount of liquid spray
The amount of liquid spray is not as good as possible. Usually, there are often vegetable farmers who ask me to spray a few barrels of water when spraying. In fact, this is a problem that cannot be answered. The most reasonable amount of liquid spray when spraying is to spray the leaves to the surface and it is just the best. good.xx