bensulfuron methyl 4% + pretilachlor 36% WP Agricultural weed killer

mixture Herbicides bensulfuron methyl + pretilachlor 40% WP Agricultural weed killer 

bensulfuron methyl

Usage method

1. rice seedling and direct seeding fields can be applied within the 2 leaf period after sowing. To control annual broad-leaved weeds and sand grass, 20-30 grams of 10% WP per mu, 30 kg of water sprayed or 20 kg of mixed fine alluvial soil sprayed. Keep the water layer 3-5cm for 3-4 days.

2. Rice transplanting fields can be used 3 weeks before and after transplanting, but 5-7 days after transplanting. Using 10% WP 20-30g per mu to control perennial weeds and barnyard grass can increase the dosage to 30-50g. The aquifer 5cm can be applied to spray water or mix well with soil, and keep the water layer for 3-4 days.

purpose

It is a selective and internally sucked conductive acylurea herbicide. Inhibitors of branched chain amino acid synthesis. The active ingredients diffuse rapidly in water and are absorbed by the roots and leaves of the weeds and transferred to all parts of the weeds, which hinders the biosynthesis of branched-chain amino acids (such as isoleucine), prevents cell division and growth, and causes the growth of weeds to be blocked and necrosis. It is suitable for rice fields to control one year or perennial broad-leaved weeds. After crop sprouts, the herbs applied before and after the sprouts had a good effect on the weeds of Hedyotis diffusa, Euphorbia chinensis, Herba Artemisiae and Cyperaceae. Recommended dosage is 0.2 ~ 0.45g/100m2 for toxic soil treatment or spray. For example, in rice direct-seeded or transplanted fields, before and after sowing or within 3 weeks before and after transplanting, it is better to use 10% wettable powder 2-3g/100m2, mix fine soil 3 kg, field water 3-5cm, evenly spreads. The control of the yield of grass weeds was not good.

pretilachlor

Chemical property

Pure products are colorless liquids. B.p.135 C /0.1Pa, relative density 1.076 (20 C), vapor pressure 0.133 * 10-3Pa. Soluble in most organic solvents, solubility in water at 20 C is 50mg / L, partition coefficient (n-octanol / water) 12020. Storage at room temperature for 2 years is stable. The hydrolysis half-life 200D (pH=1 to 9) and 14d (pH=13) were 20, and the half-life of soil was 20 to 50D.

purpose

Selective pre - herbicide, cell division inhibitor. Weeds absorb chemicals through hypocotyl and coleoptile, interfere with protein synthesis, and indirectly affect photosynthesis and respiration of weeds. In general, soil treatment can prevent and control weeds such as barnyard grass, duck leaf grass, Cyperus heterotypus, maternal grass, felts, cyanobacteria and fluorescein in paddy fields, but the control effect on perennial weeds is poor. The dosage was 4.5-5.3 g/100m2, such as rice seedling field or direct seeding field, with 30% emulsifiable oil 15-17mL/100m2, spraying with water or spraying with poisonous soil. In the South or sub tropical areas, the dosage is low, and the northern area needs to be tested before being applied.