How to determine the time of application

The application period of crop pests and diseases generally refers to the period when pests and diseases are the weakest in the whole growth period and the most sensitive to pesticides. At this time, the use of chemicals for prevention and treatment can achieve twice the result with half the effort. The control period of different pests and diseases is also different. The determination of the appropriate period of application should generally follow the following principles:

Applying the weakest link in pest activities Generally, pests are at a young age, have weak resistance to chemicals, and have many fatal weaknesses in the living habits of pests and diseases. These are favorable periods for applying pesticides. Within 10 to 12 days after the larvae are incubated, the pests are not dispersed and the control is carried out, and the effect is best. In addition, pests are generally the best time to use pesticides for prevention and treatment before the age of 3 years.

Applying pesticides at the early stage of pests and diseases According to the prediction of agricultural pests and diseases, it is possible to control the large-scale occurrence of the pests and diseases, and seize the favorable period of the early stage of the occurrence of harmful organisms, so that pests and diseases can be easily controlled.

In the growth stage of crops with strong resistance to crops, the resistance to pesticides is different at different growth stages. Generally speaking, the seed resistance is the strongest, and the crops generally have strong resistance to external adverse environment during the growth period such as seedling, flowering, grouting, fruit germination and flowering, and are prone to phytotoxicity. Apply less or reduce the concentration of the application.

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