New Practical Pesticide Spraying Skills

  It is unreasonable to expect "special effect drugs" blindly, and "magic medicine" from "medicine to disease" is also not available. In order to improve the efficacy of drugs, we need to start from the above points to find the factors that limit the improvement of the efficacy. Only by eliminating the unfavorable factors as far as possible, can the efficacy of pesticides be better brought into play.

  Before medication
Reduce the source of diseases and insects: Clean up the infected leaves, branches, fruits and even the infected plants (the source of most diseases), take out the field incineration treatment, the effect of medicine will naturally be better.
  Choose the time of medication
  (1) According to the change of temperature, it is determined that the most suitable temperature for plant, insect or pathogen is 20-30 degree， especially 25degree . At this time, the application of medicine will be more effective to the active stage of the disease, insect and grass, and is safer to the crops. In hot summer season, the medication time should be before 10 a.m. and after 4 p.m. In the cool spring and autumn season, you should choose after 10 a.m. and before 2 p.m. Winter and spring greenhouse, the best choice is warm and sunny morning medication.
  (2) According to the change of humidity, it can be determined that there are many factors affecting the liquid from depositing on pests and diseases to spreading uniform film, and the humidity of air has a great influence.
When the air humidity is too high, the deposited liquid will become larger droplets, and then under the influence of gravity, it will deposit to the lower part of the plant, resulting in drug damage. When the air humidity is too small, the liquid is easy to evaporate, resulting in fewer drugs that can touch the target, thus reducing the efficacy of the drug, and serious burning spots will occur. Therefore, the medication environment should be kept ventilated.
  (3) According to the characteristics of diseases and insect pests to determine: such as the prevention and control of whitefly (fly away whenever it meets), in the morning when dew is not dry, the prevention and control of flower thrips, in the morning when the flowers blossom, the prevention and control of leaf thrips, in the evening or evening. For example, the prevention and treatment of diseases should be carried out before and after rain, before watering, before cloudy days, and at the beginning of the disease (because many diseases are mainly transmitted by running water and wind and rain, at this time, it is too late to cry when the disease is serious without medication).
  Diluting pesticides should be appropriate: the use of drugs should be diluted according to the instructions. The dosage can be slightly increased depending on the severity of the occurrence of diseases and insects, but double use is not recommended. If you feel that the efficacy is not good, on the one hand, you can rotate another mechanism of pesticides, on the other hand, you can optimize your own medication technology.
  Mixed pesticides should be reasonable: in the early stage of disease occurrence, therapeutic fungicides inhaled by protective fungicides should be used. When insecticides are used, the mixture of insecticides with ovicidal and adult killing effects can be selected. Note: Avoid mixing of the same ingredient and copper preparation with alkaline pesticides in order to prevent drug damage.
  When taking medicine
  Master the method of medication: For the pests who like to harm a part of the plant, the medication should focus on this part (such as the back of leaves, fruits, flowers, stem base, etc.).
Grasp the distance and speed of spraying properly: After spraying out from the nozzle, the liquid bursts into smaller droplets while colliding with the air, and then rushes forward. As a result, the droplets become smaller and smaller. That is to say, in a certain range, the farther away from the nozzle, the smaller the droplets. Smaller droplets are easier to deposit and spread on the target. So, it's not that the sprinkler will work better when it's close to the plant. Generally speaking, the nozzle of the knapsack electric sprayer should be kept at 30~50 cm distance from the target, and the mobile sprayer should remain at a distance of 1 meters.
  Adjust the size of the droplet: adjust the size of the droplet according to the performance of the sprayer and its sprinkler. When greenhouse vegetables are used to prevent pests and pests such as aphids and whiteflies, smoke machines are selected. When outdoor vegetables are used to control pests and diseases, they must choose larger sprays.