How to use pesticides correctly? What kind of medicine can you choose in hot and rainy weather?

Insecticide refers to the chemical agents used to control pests, mainly used to control agricultural pests and urban health pests, with a long history, large dosage and many varieties. So how to use pesticides correctly? What kind of medicine can you choose in high temperature and rainy weather?

First, how to use pesticides correctly?

The main results are as follows: 1. According to the characteristics of climate and the law of diurnal activity of pests, the pesticide should be applied at a favorable time.

The suitable time for pesticide application is from 9 am to 10:00 and after 4 pm. Because after 9: 00 in the morning, the dew on the crop leaves has dried, and it is the time when the activity of sunrise pests is at its peak.

At this time, the application of pesticide will not affect the control effect because of the dew dilution, but also make the pests come into direct contact with pesticides and increase the chance of pest poisoning.

After 4 p.m., the sun tends to the west, the light weakens, the temperature drops, and it is when flying activities and nocturnal pests are about to go out at dusk that pesticide can be applied to crops in advance.

When the pests come out or feed at dusk or at night, they will be exposed to venom or poisoned to death, and the evaporation loss and photolysis failure can be avoided at the same time.

2. According to the harmful parts of pests, different pesticides and different application methods should be selected and delivered in place.

For pests that harm the roots, the insecticide is applied to the roots or in the sowing ditch; for pests that feed on the back of the leaves, the liquid is sprayed on the opposite side of the leaves.

To control red bollworm and cotton bollworm, put the medicine on the flower buds, green bolls and the tip of the group; spread poisonous soil on the seedlings caused by the control of borer; spray or splash the white ears.

To control rice planthopper and rice leafhopper, the liquid is sprayed on the base of rice plant, and the liquid is sprayed on flower buds and young pods to control Spodoptera litura.

In addition, according to the feeding mode of piercing mouthparts for hidden pests such as cotton aphid, red spider, rice planthopper and rice leafhopper, strong internal absorption insecticides can be selected to transmit to other parts of the plant to achieve the purpose of drug delivery.

Only when the insecticides are applied and delivered in place, can we hit the key points, achieve the efficacy of killing insects, make the agents play the best role, and obtain the ideal insecticidal effect.

What kind of medicine can you choose in high temperature and rainy weather?

1. Quick-acting pesticides. For example, insecticides such as Yechongjing, fenitrothion, dioxin, Kuishaling, deltamethrin and other pesticides have strong contact and fumigation effects, and the pests can be killed in 1-2 hours or 4-5 hours after application.

2. Internal inhalation pesticides. Internal absorption pesticides can be introduced into the plant through the roots, stems, leaves and other parts of the crop, and transported to other parts, and play a role in a short time. After 4-5 hours of application, 80% of the active ingredients were absorbed into the tissue by crops, and less was lost due to Rain Water leaching.

3. Microbial active pesticides. Microbial pesticides such as cyanobacteria and Beauveria bassiana are commonly used, which are more conducive to sporophyte germination and reproduction under high humidity conditions, and their insecticidal effects can be brought into full play when applied in overcast and rainy days.

4. Rinse resistant pesticide fungicide. Zhongjinggangmycin, methomyl and Sukeling have good rain resistance. Even if they encounter showers after 1-5 hours of application, they will not be brushed and the efficacy will not be affected.