Oxadiazon

Chemical properties:
The original medicine is white crystal, no odor, not hygroscopic. m.p. about 90 ℃, vapor pressure 1.33 × 10-3Pa. The solubility in methanol and ethanol is about 100g / L at 20 ℃, about 200g / L in cyclohexane, and about 1000g / L in acetone, carbon tetrachloride and methyl alcohol. It is stable under general storage conditions and decomposes in alkaline solutions without corrosion.

use:
Herbicides before and after germination. Used as soil treatment, water and dry field. Mainly through the absorption of weed shoots and stems and leaves, it can exert good herbicidal activity under light conditions. It is particularly sensitive to weeds at the budding stage. When the weeds germinate, the growth of the bud sheath is inhibited, and its tissues decay rapidly, causing the weeds to die. As the weeds grow, their efficacy decreases, and they are basically ineffective against grown weeds. It is used to control barnyardgrass, hejinjin, paspalum, special-shaped sedge, rhododendron, artemisia, rhododendron, melon grass, etc. It can also be used to control annual grass weeds and broad-leaved weeds of crops such as cotton, soybeans, sunflowers, peanuts, potatoes, sugar cane, celery, fruit trees and other crops. It has a good control effect on weeds in the family Amaranthaceae, Chenopodiaceae, Euphorbiaceae, Oxyrrhizaceae, and polaroidaceae. For use in rice transplanting fields, 12% EC 30-30mL / 100m2 or 25% EC 15-20mL / 100m2 in the north, 12% EC 20-30mL / 100m2 or 25% EC 10-15mL / 100m2 in the south, and the field water layer 3cm ， Directly shake the bottle or mix with poisonous soil to disperse, or spray 2.3 ~ 4.5kg of water, it is advisable to use the water after the ground preparation. The seedling field is used to spread the medicinal soil while the water is turbid after 2 to 3 days before sowing, sowing when it is settled to the bed surface without water layer, or sowing after soil preparation, spraying treatment after covering the soil, and covering the plastic film. 12% emulsifiable concentrate 15-25mL / 100m2 for the north, 10-20mL / 100m2 for the south. In the dry field, the soil surface is sprayed 5 days after the rice is sown, when the soil before the shoot is wet, or after 1 leaf stage of rice. Use 25% EC 22.5 ～ 30mL / 100m2.