Promethazine is insoluble in water and soluble in organic solvents. It is an endogenous selective herbicide. It can be absorbed and transmitted through roots and leaves. It has the best control effect on newly germinated weeds and has broad weed killing spectrum. It can control annual grasses and broad-leaved weeds. So how to use promethazine?
1. Dryland use
Before sowing or after seeding, 50% grams of wettable powder or 100-150 ml of 48% flurane 100 ml per mu were mixed with 100 g of 50% pflukon wettable powder. The water was uniformly sprayed on the surface of 30 kg, or 20 kg of mixed soil evenly. Then the mixture of 3cm was deep, which could effectively control 1 year old mono and dicotyledonous weeds.
Peanuts, soybeans, before sowing or after sowing, 100-150 grams of 50% WP for each acre, and 30 kg for water.
Before the seedlings were sown, 50 grams of wettable powder were used per mu, 30 kg for water, and 50% for soil spray.
The wheat field is in the 2-3 leaf stage of the wheat seedling, the 1-2 leaf stage of weeds, 75-100 grams of 50% wettable powder per acre, and 30-50 kg of water for spray treatment of stems and leaves.
Carrot, celery, garlic, onion, leek, fennel and so on before sowing or after sowing, use 50% WP 100 grams per mu, spray evenly on 50 kg soil surface, or use 50% PPG wetting powder 50 MGG / 25% MCAO EC 200 ml in each acre, the effect is better.
2. Use of fruit trees, tea gardens and mulberry gardens
In the early stage of annual weed germination, 50% wettable powder 250-300 g per mu was used under wet soil conditions. It was mixed with lassos and butachlor to spray water evenly on the surface of soil. Five to seven days after rice transplantation, 50% wettable powder 20-40 grams per mu, or 50% promethazine wettable powder plus 25% herbicide wettable powder 400 grams, wet fine sand 20 kg or so, fully mix, evenly sprinkle the whole field after rice leaves are dew-dried.
The shallow water layer of 3-5 cm was maintained in the field during the application of pesticides, and the water retention time was 7-10 days after the application of pesticides. 20-25 days after rice transplantation, when the leaves of Euphorbia japonica changed from red to green, 65-100g of 50% wettable powder was used in the north, 25-50g in the south, and 20-30kg of wet fine soil was mixed. The water layer remains the same.