How to use pesticides in hot weather in summer

Summer is the peak season for various pests and diseases, and the rising temperature also brings inconvenience to crop dosing and is prone to pest damage. In the summer, how to avoid damage and improve the effectiveness of the drug, so as to produce the effect of playing once top two times?

according to the temperature and its changing trend to determine the time to hit the drug

Whether it is plants or insects or germs, 20~30℃, especially 25℃, is the most suitable temperature for their activities. At this time to hit the drug, the pests and plants in the active period will be more effective and safer for the crop.

In the hot summer season, the time of dosing should be before 10:00 am and after 4:00 pm.

In the cooler spring and fall seasons, you should choose after 10am and before 2pm.

For winter and spring greenhouses, it is best to choose the morning of sunny and warm weather for dosing.

According to the humidity and its changing trend to determine the time of dosing

The liquid from the nozzle deposited on the target needs to be unfolded to form a uniform film in order to cover the target surface to the greatest extent, and then “mask” the target pests. From deposition to unfolding of the drug solution will be affected by a variety of factors, including the influence of air humidity.

The air humidity is small, the water in the droplets will quickly evaporate into the air, even before the liquid spread in the air humidity is too large, the deposition of liquid on the surface of the plant, especially large droplets of mist will easily coalesce into larger droplets, and the second by gravity under the influence of the plant deposition, will also produce drug damage.

Therefore, the time of day for dosing needs to follow two principles.

First, the air humidity is slightly dry.

The second is to hit the drug after the liquid can form a dry film on the surface of the target before sunset.

Third, the three common misconceptions of drugging

only by dilution times to determine the number of agents in each bucket of water

Most people are used to calculating how much medicine in each bucket of water according to the dilution times, in fact, this is not very reliable. The reason why we need to control and calculate how much medicine to add in the tank is to calculate how much medicine is needed for the plants in the unit area to ensure good efficacy and safety to the plants and the environment.

Special reminder: after adding how much agent in each bucket of water according to the dilution times, you also have to calculate how many buckets of water per acre are needed, spraying marching speed and other details.

At present, subject to labor constraints, many people tend to add to the liquid tank to add the amount of drug, fast spraying, this approach of putting the cart before the horse is clearly wrong. The most reasonable initiative is to choose the spray performance of better instruments, or according to the product instructions to mix the drug, carefully sprayed.

the closer the nozzle to the target will be more effective

Spray from the nozzle after the collision with the air while breaking into smaller droplets while rushing forward, stumbling all the way to the result is smaller and smaller droplets. In other words, within a certain distance, the further away from the nozzle, the smaller the droplets. Smaller droplets are more likely to be deposited and spread out on the target. Therefore, it is not true that the spray nozzle is more effective when it is close to the plant.

Generally speaking, the backpack electric sprayer nozzle and the target to maintain a distance of 30 to 50 centimeters, motorized sprayers to maintain a distance of about 1 meter, according to the performance of the sprayer and its nozzle, swing nozzle so that the drug mist floating down on the target, the effectiveness will be better.

the finer the droplet will definitely have better efficacy

The smaller the droplet is not the better, the size of the droplet and its ability to better distribution, deposition and spreading on the target. If the droplet is too small, it will float in the air and difficult to deposit on the target, which will definitely cause waste; if the droplet is too large, the droplet will roll down on the ground and increase the amount of liquid, which is also wasteful.

Therefore, according to the object of control and its space environment to choose the appropriate spraying equipment and nozzle, in the relatively closed room to control diseases and whiteflies, aphids and other tiny pests can choose the smoke machine, in the open field to control these pests and diseases when you have to choose a larger droplet of equipment and nozzle.