Which weeds can prometryn control? A detailed explanation of its herbicidal range

Prometryn can be used in cotton, soybean, wheat, peanut, sunflower, potato, fruit trees, vegetables, tea plantations and paddy fields to control barnyardgrass, crabgrass, Chinese sprangletop, wild amaranth, knotweed, lambsquarters, purslane, shortawn foxtail, chickweed, plantain and other annual grasses and broadleaf weeds. It is low in toxicity to humans and livestock, low in toxicity to birds and bees, and moderately toxic to fish.

I. Methods of use

1. Use in dry fields

For cotton, before sowing or after sowing but before emergence, use 100-150 g of 50% wettable powder per mu, or mix 100 mL of 48% trifluralin emulsifiable concentrate with 100 g of 50% prometryn wettable powder per mu, dilute in 30 kg of water and spray evenly over the soil surface, or mix with 20 kg of fine soil and broadcast evenly, then incorporate into the soil to a depth of 3 cm; this can effectively control annual monocotyledonous and dicotyledonous weeds.

For peanut and soybean, before sowing or after sowing but before emergence, use 100-150 g of 50% wettable powder per mu, dilute in 30 kg of water, and spray evenly over the soil surface.

For foxtail millet, after sowing but before emergence, use 50 g of 50% wettable powder per mu, dilute in 30 kg of water, and spray over the soil surface.

For wheat fields, at the 2-3 leaf stage of wheat seedlings and the 1-2 leaf stage of weeds, use 75-100 g of 50% wettable powder per mu, dilute in 30-50 kg of water, and apply as a foliar spray to control weeds such as chickweed and shortawn foxtail.

For carrot, celery, garlic, onion, Chinese chive, fennel, etc., at sowing or after sowing but before emergence, use 100 g of 50% wettable powder per mu, dilute in 50 kg of water and spray evenly over the soil surface, or use 50 g of 50% prometryn wettable powder mixed with 200 mL of 25% nitrofen emulsifiable concentrate per mu for a better effect.

2. Use in fruit orchards, tea plantations and mulberry fields

At the early stage when annual weeds are germinating heavily, under moist soil conditions, use 250-300 g of 50% wettable powder per mu, alone or at half the rate mixed with alachlor, butachlor, etc., dilute in water and spray evenly over the soil surface. For use in paddy fields: 5-7 days after rice transplanting, use 20-40 g of 50% wettable powder per mu, or 50% prometryn wettable powder plus 400 g of 25% nitrofen wettable powder, mix with about 20 kg of moist fine sandy soil, stir thoroughly, and after the dew on the rice leaves has dried, broadcast evenly over the whole field. At the time of application, keep a shallow water layer of 3-5 cm in the field, and maintain the water for 7-10 days after application. 20-25 days after rice transplanting, when the leaves of pondweed turn from red to green, use 65-100 g of 50% wettable powder per mu in the north, and 25-50 g in the south, mix with 20-30 kg of moist fine soil and broadcast. Keep the water layer the same as before.

II. Precautions

1. Strictly control the application rate and timing, otherwise phytotoxicity is likely to occur.

2. Sandy and low-organic-matter soils are prone to phytotoxicity and should not be used.

3. Do not loosen or harrow the soil arbitrarily within half a month after application, so as not to destroy the herbicide layer and affect efficacy.

4. Clean spray equipment thoroughly after use.

Although prometryn is easy to use, it should be used according to the instructions; it is low in toxicity to humans and livestock, and safety and frequency of use should be observed to avoid unnecessary trouble.