The best time to spray pesticides in summer

The use of pesticides is the most common in our planting and production. When spraying pesticides, we should pay attention to the spraying time, which has a great relationship with the control effect of pesticides. The spraying time should be adjusted reasonably according to the seasonal changes, especially in summer. So when will pesticide spraying be carried out in summer? The following editor brings you the best time for pesticide spraying in summer. Let's have a look!

First, spraying time

Many people prefer to spray pesticides at noon when spraying pesticides in summer. Feel that the noon temperature is relatively high, pests are easy to be eliminated, in fact, this is not right. Because at noon, not only the temperature is high, the light is also very strong. Pests are generally hidden in the stem and fruit of the plant, so it is difficult to control them. And the temperature is high at noon, the pesticide is easy to be decomposed and volatilized after spraying, which can not achieve the ideal control effect. And after the volatilization of pesticides, if the gas is inhaled into the human body, it can easily lead to human poisoning.

Therefore, when spraying pesticides in summer, whether you are growing grain or vegetables and fruits, the best time should be around 9 a.m. At this time, the dew gradually dried up, and the temperature was not very high. At the same time, it is also the strongest time for all kinds of pests to go out to look for food. Therefore, spraying pesticides at this time will not be washed away by dew, nor will it be evaporated and decomposed because the temperature is too high, resulting in a decline in efficacy. On the contrary, it can also increase the probability of insect pests exposed to pesticides. Or spray after 5pm, which is the beginning of the activity of nocturnal pests, which can eliminate nocturnal pests.

II. Points for attention

1. Concentration of the solution

When spraying pesticides, many farmers will choose to increase the use of pesticides and reduce the dilution of pesticides in order to improve the control effect of pesticides. It leads to an increase in the concentration of pesticide solution, and it is still the same in summer. Because in the environment of strong light and high temperature, the rate of water evaporation is very fast, if the concentration is too high, it is very easy to cause crop leaves to be harmed by pesticides. Then we should pay attention to the selection of pesticides, mainly with quick-acting and strong internal absorption of pesticides. For example, dichlorvos, trimethoprim, etc., can eliminate pests about two hours after use.

2. Spraying safety interval

When spraying pesticides, we should also pay attention to determine the safe interval of pesticide spraying according to the toxicity of pesticides. Usually, the residual period of highly toxic pesticides can be as long as one month. And if it's a low-toxic pesticide, it's usually only a week or so. Therefore, whether it is grain or hanging fruit, we should pay attention to standardize the use of drugs before harvest to avoid human and animal poisoning. When taking medicine in summer, it is necessary to add enough water to dilute it. When spraying, the sprayer should not be too full, and the lid should be tightly covered to prevent the liquid from splashing on the body, resulting in personnel poisoning.

The above is a brief introduction to the best time for pesticide spraying in summer. That's all for today's introduction. This article is for reference only. I hope it can help you all.