How to choose when and where to use pesticides?

When using pesticides to control crop pests, in order to achieve the best insecticidal effect, SLEEP COOL insect killer supplier in addition to choosing the right counterpart drug and applying it at the right time, special attention should be paid to the time and place of medication.

First, according to the climate characteristics and the day and night activities of pests, Chinese EASY ON Spray starch manufacturer choose the appropriate time to apply medicine.

The best time to apply pesticides is from 9 a.m. to 10 a.m. and after 4 p.m. Because after 9:00 AM, the dew on the leaves of the crops has dried up, and it is the peak of the sunrise pests. Chinese EASY ON Spray starch supplier At this time, the application of medicine will not affect the control effect due to dew dilution, but also make the pest direct contact with pesticides, increasing the chance of pest poisoning.

After 4 o 'clock in the afternoon, the sun is west, the light intensity is weakened, the temperature can be lowered, and we are at a time when the evening flying activity and night emergence pests are about to be dispatched, and the medicine can be applied in advance on the crops, so that when the pests come out at dusk and night for social activities or feeding, they can contact the venom or feed poisoning patients die. At the same time, the enterprise can also effectively avoid the evaporation loss of pharmaceutical liquid and photolysis failure.

Second, according to the harmful parts of the pests, choose different agents and take different application methods, and send the medicine in place.

For pests that harm roots, apply chemicals to roots or seeding trenches; For the pests feeding on the back of the leaves, spray the liquid on the back of the leaves; In order to control the red bollworm and cotton bollworm, the drug is applied to the bud, green bell and ball tip; Sow toxic soil to prevent dead seedlings caused by borer; Spray or water white ears; In order to control rice planthopper and rice leafhopper, the liquid was sprayed on the base of rice plants. To control the moth, spray the solution on the buds and young pods.

In addition, depending on how concealed pests such as cotton aphids, red spiders, rice planthoppers and rice leafhoppers feed on their mouthparts, other parts of the plant can spread after being absorbed by the highly absorbable insecticide, thus enabling the delivery of the drug in place. Only through insecticides, put in place, in order to hit the key, to achieve the effect of insecticides on pest control, so that pesticides play the best role, to achieve the ideal effect of pest control.

Why do the more pesticides you use, the less effective they are

When a drug is used, the insecticidal effect study can often be very good, but with the continuous development and increase of the dosage and the need to expand the scope of use management, the case of rising resistance enterprises continue to learn. The most prominent is cis-valerthrin, the "just" riflein used to be in the 80s advertising design, and soon we won't be able to get justice, because they can't kill the pests even if the students increase their dosage or dosage tens or even hundreds or thousands of times.

This is because pests develop resistance, which is the ability to tolerate doses of a drug that kills most individuals in a normal population and develops in a normal population.

In fact, there are individuals with different sensitivities to pesticides in natural pest populations. The use of pesticides is actually the process by which pesticides play a selective role in insect populations. Every time a pesticide is used, it leaves relatively resistant individuals and kills relatively sensitive ones, which more or less increases the level of resistance in the pest population.

It has been identified that:

(1) The occurrence of resistance is related to pests and their living habits. Pests with short life history, many generations, and more exposure to pesticides, such as mites, scale insects, aphids, mosquitoes, etc., are the most susceptible to resistance

(2) A pest is resistant to one pesticide and is often resistant to other pesticides of the same class; The interaction between drugs with different insecticidal mechanisms is not easy to occur.

(3) The same pesticide is continuously used for different times or the working concentration is high, and the resistance is formed quickly, and the reverse is slower.

Given this, we can prevent or delay the rise of insecticide resistance through the rational use of medicines. Therefore, the number and dose of chemical control should be reduced as much as possible by breeding, spreading disease-resistant varieties, improving cultivation techniques and developing biophysical techniques.

Secondly, select pesticides with different mechanisms of action, such as mixing, rotation, Mosaic application, etc.

The third is to improve the application technology, such as symptomatic medication, timely spraying, the selection of efficient machinery, in place spraying, etc., to improve the insecticidal effect as much as possible.