Reasons for the poor efficacy of pesticides in the field:

First: the diagnosis of the disease is wrong. If the early defoliation of the tree is used as a spider hazard, the tomato bacterial wilt is used as a ground pest to bite the roots and so on.

Second: the choice of drugs is not symptomatic.

Third: When controlling pests, it should be applied best at the peak of adult spawning or before the larvae hatch to the third age.

Fourth: Improper dose control. Too much or too little is not good. If the concentration is too large, it is easy to cause phytotoxicity. If the concentration is too small, it will not achieve the purpose of prevention and treatment. It must be formulated according to the pesticide use instructions and requirements in combination with the actual situation, in order to obtain satisfactory results.

Fifth: Improper mixing of medicines. Pesticide is acidic and alkaline. If it is mixed improperly, it will cause acid-base neutralization and decomposition failure.

Sixth: Spraying the spray to the vital part will receive the desired effect. For example, to control cotton spider mites, it is necessary to spray the medicine on the back of the blade to receive the best results.

Seventh: The efficacy is closely related to meteorological factors such as temperature, humidity, rain, dew, wind and light. The use of stomach poisons, contact pesticides, at least two days without rain wash, in order to better play the drug.

Eighth: There is also a relationship between the poor efficacy and the spraying tool used. The good quality sprayer not only saves the medicine but also saves the effort. Inferior quality spraying tools cause phytotoxicity, loss, and even poisoning of farmers.

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