One should pay attention to using pesticides before seedlings. For chemical weeding in vegetable fields, soil treatment is often used, but it must be applied before sowing or after sowing, and the time of weeding should be weeding at the initial stage of weeds. This can avoid or reduce the pesticide contamination of vegetables.
Second, we must pay attention to making the soil moist and flat. Before treating the soil with herbicides, it is required that the soil surface should be smooth and the soil particles should be finely crushed and moistened. This will ensure uniform application of the fertilizer in the near future and create favorable conditions for the weeds to germinate, so that the weeds will germinate once, so that one drug can be used to kill large ones. The purpose of some weeds is to increase the weeding effect.
Third, we must pay attention to timely medication. General chemical herbicides have a good effect in the weeding period. However, when the weed grows to 9 cm or is administered after delivery, the effect is poor or even ineffective. Therefore, herbicides are carried out during the weeding stage.
Fourth, we must pay attention to uniform spraying. Poorly wettable chemical herbicides are prone to precipitation. Therefore, the spray should always shake, to ensure uniform spraying, otherwise the underlying liquid concentration is too high, easily lead to injury.
Fifth, pay attention to reducing medication in the facility cultivation area. Soils cultivated in facilities such as protected areas have high soil temperatures, high humidity, and rapid and high efficacy. Therefore, the dosage should be reduced by 20-30% in the exposed vegetable fields so as to avoid causing phytotoxicity to the vegetables.
Six should pay attention to alternate medication. In order to increase the herbicidal effect, it is not possible to use a single herbicide for a long period of time in order to prevent weeds from developing drug resistance.
Seventh, pay attention to timely soiling. Some chemical herbicides, such as trifluralin, are volatile and should be soiled immediately after application to ensure weed control. Some herbicides see light that breaks down and fails, and cannot be exposed to sunlight. Therefore, immediately after application, soil should be covered.
Eighth, we must pay attention to the use of herbicides with a short duration of efficacy. According to the different varieties of vegetables and the length of the growing season, generally choose suitable herbicides for the effective period, can reduce the time of residual herbicide contamination, and ensure the safety of vegetable production.
Dental Waxer,Electric Wax Knife,Dental Lab Electric Waxer,Electric Wax Carver Dental
Hebi Tianchi Trading Co., Ltd , https://www.hebitianchi.com