Eight common reasons for the decrease of pesticide efficacy

Common reasons for the decrease of Pesticide efficacy

1. The efficacy is closely related to meteorological factors such as temperature, humidity, rain, dew, wind and light. The use of stomach poison, contact insecticide pesticides, at least two days without rain erosion, in order to better play the efficacy.

2. It is not right to choose drugs.

3. In the control of insect pests, the effect of pesticide should be the best during the peak period of adult oviposition or before the larvae are hatched to the third instar.

4. Improper control of dosage. It is not good to use too much or too little, too much concentration is easy to cause drug damage, and too low concentration can not achieve the purpose of prevention and control. It must be prepared in accordance with the instructions and requirements of pesticides combined with the actual situation in order to achieve satisfactory results.

5. Improper mixing of drugs. Pesticides can be divided into acidity and basicity. If mixed improperly, it is easy to cause acid-base neutralization decomposition failure.

6, spray to the key parts, will receive the ideal effect. Such as the prevention and control of cotton red spiders, spray must be sprayed on the back of the leaves in order to get the best results.

7. Wrong diagnosis of the disease. If the early defoliation disease of the tree is harmful to spiders, tomato bacterial wilt is used as an underground pest to bite roots and dead seedlings, and so on.

8. There is also the relationship between the poor efficacy and the spraying tools used. The sprayer with good quality can not only save medicine and labor, but also improve the efficacy. Poor-quality spraying tools cause drug damage, losses, and even poisoning of farmers.