Non-pollution vegetable field use herbicide should pay attention

In vegetable production, weeding and weeding often account for more than 50% of the total management of the entire vegetable field. If chemical weeding is used, it will not only effectively control weeds, increase the quality and yield of vegetables, but also save a lot of manpower and material resources. However, chemical weeding should pay attention to the following aspects:

Pre-emergence herbicides are used for chemical weeding and are mostly treated with soil. Practice has proved that: before the sowing or before sowing, the effect of drug application before budding is best, which can effectively avoid or reduce the pesticide residue on the vegetables, in order to facilitate the production of pollution-free vegetables.

It is best to control weeds at the right time in the germination stage of weeds. General herbicides have a good effect in the weeding period of germination, but they are less effective or even ineffective when the weeds grow to 9 cm or after giving birth.

Uniform spraying of herbicides with poor wettability is prone to precipitation. Therefore, when spraying, shake it frequently to ensure even spraying, otherwise the concentration of the lower layer of the liquid is too high, which can easily cause injury.

Alternate medication Caution Do not use a single herbicide for a long period of time to prevent weeds from developing drug resistance and reduce weeding.

Facilities such as cultivation and reduction facilities, such as drug protection sites, have high soil temperature, high humidity, and high efficacy. Therefore, the dosage should be reduced by 20% to 30% in the exposed vegetable fields to avoid phytotoxicity in vegetables.

Soil wetting in the application of herbicides requires a smooth surface and finely ground and moist soil. This will not only ensure uniform application of pesticides, but also create favorable conditions for the germination of weeds to make the weeds germinate in a consistent manner, thereby achieving one-time drug killing. The purpose of most weeds is to increase weeding

Timely soil cover on herbicides that are volatile and cannot be exposed to sunlight. Immediately after application, soiling should be performed to ensure efficacy.

The selection of herbicides with a short duration of efficacy depends on the variety of vegetables and the length of growth period. In principle, a suitable herbicide with a short shelf life should be selected to reduce the time of residual herbicide contamination and ensure food safety.

The implementation of pollution-free standard vegetable fields for chemical weeding must be conducted in strict accordance with pollution-free standards to achieve both high yield and high quality.

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