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1, as far as possible in the pre-planting vegetable field chemical weeding, mostly using soil treatment, but must be used before sowing or before sowing after sowing, the time of application should be good weeding effect in the first stage of weeds. This can avoid or reduce the contamination and residue of the medicament on vegetables.
2, to make the soil flat and moist in the herbicide treatment soil, the soil requires the soil surface is flat, finely divided, moist, so that not only can ensure uniform application, but also can create favorable conditions for weed germination, so that weeds are consistent. Thereby achieving the purpose of killing most of the weeds once, and improving the effect of weeding.
3, the timely use of chemical general herbicides in the germination period of weeds use good results. However, when the weeds grow to 9-10 cm or after tillering, the effect is poor or even ineffective. Therefore, weeds should be carried out in the stage of weed germination.
4. It is easy to precipitate the chemical herbicide with poor wettability. Therefore, it is necessary to shake frequently when spraying to ensure uniform spraying, otherwise the concentration of the lower layer of liquid is too high, which may cause phytotoxicity.
5. The soil to be cultivated in facilities such as reducing the amount of drug protection facilities in the facility cultivation area is high in temperature and humidity, and the effect is fast and high. Therefore, the dosage should be reduced by 20% to 30% compared with the vegetable field in the open field, so as not to cause phytotoxicity in vegetables.
6. It is necessary to use the drug alternately. It is not allowed to use a herbicide for a long time to prevent the weed from developing resistance and improve the herbicidal effect.
7. Chemical herbicides such as trifluralin which are to be covered in time should be easily volatilized. Immediately after application, the soil should be covered to ensure the control effect. Some herbicides are easy to decompose and fail to be exposed to sunlight. Therefore, cover the soil immediately after administration.
8. It is necessary to choose a short-lived use. According to different vegetable varieties and the length of the growing season, it is generally better to use a suitable herbicide for the effective period to reduce the time of residual pollution and ensure safety.
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How to use herbicides in vegetable fields
In vegetable production, cultivating and weeding often account for more than 40% of the total vegetable field management. If chemical weeding is used, it can not only effectively control weeds, improve the quality and yield of vegetables, but also save a lot of weeding labor and reduce labor intensity, but the following "eight attentions" should be made.
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