How to use pesticides in hot weather?

After the rainy weather, the temperature gradually increased. With the growth and development of crops, spraying pesticides on crops is also an essential stage. But in the process of spraying, it will be found that the effect after spraying is not very good. Farmer friends thought there was something wrong with fertilizer, but it wasn't. Is it really necessary to master the method of spraying pesticides? Spraying pesticides on a hot day, are you sure you sprayed it correctly? Farmer friends should not take it seriously, otherwise the money may not have practical effect.

So how to spray pesticides on a hot day? It's not that hard. As long as you grasp this key point, you can get started easily. Below, the author will tell farmers how to spray pesticides at high temperature without damaging crops and giving full play to the efficacy of chemical fertilizers.

1, select the time for spraying pesticides. Usually after noon. At that time, the temperature was high, reaching above 30℃ and the sunshine was strong. When spraying pesticides, the performance of drugs will be very strong, which will easily lead to pesticide poisoning. At this temperature, most pests will hide in the shade, that is, the led backlight of green plants. Drugs volatilize quickly and pests can't spray them. Therefore, this appropriate method is generally in hot weather, and the spraying time should be before 10 am and after 4 noon. The temperature is about 25℃, which is more suitable. If it is spring and autumn, pick it before eleven o'clock in the morning and at two o'clock in the afternoon.

2. Select the spraying temperature. What kind of climate do you choose in the case of spraying? In rainy mountainous areas, you can choose to wear a hat on rainy days. If the wind is strong, stop spraying. Because spraying is asymmetric at this time, it is very easy to damage crops. Naturally, you can't choose rainy days, because the medicine sprayed at this time will be washed away with precipitation, which is equivalent to white spraying and has no practical effect at all.

3, according to the characteristics of the disease, control whitefly (flying when touched), and spray it before the dew is wet in the morning; Prevent diseases by spraying before rain, after rain, before watering and before rainy days (since many diseases are spread by water and wind and rain, this is the best time to prevent diseases from spraying).

4. Fertilizer must also be used moderately according to the instructions. It can be supplemented slightly according to the obvious degree of pests, but it can't be used twice, otherwise it won't work if it costs money. If the efficacy of the drug can not achieve the actual effect of pest control, on the one hand, it can be replaced by another chemical fertilizer, on the other hand, it can improve its spraying technology. For example, the above method must be bypassed.