Chemical control of main weeds in vegetable fields
According to statistics, there are more than 140 kinds of weeds in vegetable fields, of which 40-50 species are common and 15-20 species are harmful. The main ones are seven kinds of grey vegetables, leeks, purslane, valerian, goosegrass, setaria and sedge. The sum of the number of these grasses in different vegetable fields is an absolute advantage. Therefore, they are the main objects of weeding in vegetable fields. Artificial weeding is laborious and time-consuming, and it is difficult to control the damage of a large number of weeds. Chemical weeding techniques have quick results and good results. Summer and autumn vegetable weed control can be controlled by the following methods.
1. Chemical weeding in cruciferous vegetable fields
Cabbage, radish, cabbage, cauliflower, rapeseed and other cruciferous vegetables, 48% trifluralin is used before seeding or transplanting, or 100 ml per acre (or 667 m2) or 33% Shitian. 75 ml.
Radish and Chinese Cabbage have high temperature and quick emergence after planting. Immediately after sowing, topsoil is treated immediately before seedling so that the best effect is to combine watering. Do not use it before broadcasting.
2. Weeding carrot field
Before or after sowing, 48% trifluralin EC is used, 125-150 ml/mu; or 33% Shidi-supplemented oil, 100-125 ml/mu; or 40% Praxanthine WP, per mu 70 - 100 grams. Trifluralin and Shitian supplements must be mixed with 3-5 cm of soil after application before or after sowing. Use paraquat before seedling after sowing.
3. Weeding celery field
When growing and transplanting, use 33% of Shi Tian's cream oil 100 ml; or trifluralin 125-150 ml; or 40% Praxanthine wettable powder 100 g per mu. After sowing seedlings for soil treatment. Low-dose can also be used to treat stems and leaves when weed 1 leaf 1 heart to 2 leaf 1 heart, and can also use tiantianbu or trifluralin in combination with cultivator before transplanting or after transplanting, without mixing soil before transplanting. . When using, pay attention to the amount of paraquat should not be too large. After transplanting, dicotyledonous broad-leaved weeds can be used for prolonged periods of time, but it is safe to use it after transplanting celery. However, it is not too late.
4. Weeding the parsley
Seedlings use 48% trifluralin EC, 125-150 ml per mu. Application of pesticides before or after sowing, shallow mixed soil. The coriander is poor in drug resistance, and it is best not to treat the stems and leaves during the seedling stage.
5. weeding onions
At the seedling stage, 40% paracetamol WP can be used for 60-75 grams per mu; or 33% Shitian replenishing oil can be used for 100-125 ml per mu, either alone or in combination. When mixed, the dosages of the two agents were each reduced by half, and soil treatment was performed before seeding after sowing. Onions with high temperatures can be used at low doses and the dosage must be strictly controlled to avoid phytotoxicity.
6. Weeding the leeks
Breeding leeks can use the following agents: 40% Praxegrarin WP 70-90 grams per mu; 33% Shi Tian replenishing oil use 100-150 ml per mu, seedlings after leeks sowing, medication, watered 40-50 kg , Spray the soil.
For transplanting or root leeks, 48% trifluralin can be used, 50-200 ml per mu; or 33% Shidi replenishing oil is diluted to 50 kg per mu in 125-150 ml, before and after transplanting, and after planting. it is good. After the application of shallow soil. After each harvest of root leeks, clear the field grass.
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