Strong Contact Agricultural Herbicides Diuron 80% SC Phenyl Ureagroup Weed Killer

Agricultural weed killer Diuron 80% SC, 80% WP, 97% TC, 25% WDG phenyl ureagroup herbicides

Substituted urea herbicides

Diuron, Metron and Ligouron are three commonly used substitutes for urea herbicides. Diuron is an endogenous and conductive herbicide. It has certain contact killing activity and can be absorbed by the roots and leaves of plants. It is mainly absorbed by the roots of plants. The weed roots absorb the herbicides and transmit them to the leaves of the ground, along the veins of leaves, inhibiting light. The cooperative Hill reaction results in chlorosis of leaves, discoloration of leaf tips and margins, and subsequent yellowing and death. Diuron can be used as a selective herbicide at low doses and a sterile herbicide at high doses. Diuron is suitable for rice, cotton, corn, sugarcane and fruit, gum, mulberry, tea garden use, control barnyard grass, tangerine, dog tail grass, polygonum, Chenopodium and Eggplant. Low toxicity to human and animal, acute oral LD50 of rats is 3400 mg/kg, high concentration of eye and mucosa irritation. The diuron had no significant effect on Seed Germination and root system, and the drug effect period could be maintained for more than 60 days.

1, the diuron has a killing effect on wheat seedlings, and the wheat field is forbidden. In the tea, the mulberry, the orchard should adopt the poison soil method, in order to avoid the drug harm.

2. Diuron has a strong contact killing effect on cotton leaves. It must be applied on the soil surface. Diuron should not be used after cotton seedlings are unearthed.

3, sand soil, the dosage should be less than the clay soil. Sand leaking rice fields are not suitable for use.

4. Dichloruron has strong lethality to fruit trees and leaves of many crops, so it should be avoided to drift the liquid to the leaves of crops. Peach trees are sensitive to the enemy's grasses and should be paid attention to when they are used.

5, the equipment that is sprayed with diuron must be cleaned again and again with clean water.

6. Diuron is not easily absorbed by most plants when it is used alone. Surfactants should be added to improve the absorption capacity of plant leaves.

Chemical property

Pure product is white crystalline solid. M.P. is 158~159 C, and the vapor pressure is 4.13 x 10-4Pa (50 C). It is soluble in hot alcohol, 5.3% in acetone, slightly soluble in dioxane, ethyl acetate, ethanol and hot benzene, and 42mg/L in water at 25 ~C. Stable in the air, heated to 180 ~ 190 C decomposition, strong acid, strong base easily decomposed, non-corrosive, non-flammable. The industrial product is m.p.>150 C.

Purpose

Instead of urea herbicide, it has internal absorption and a certain touch - killing effect. When absorbed by roots or leaves, the chemicals inhibit photosynthesis, resulting in chlorosis of leaves, discoloration of leaf tips and edges, and plant death due to lack of nutrition. In the low dose of diuron, weeds can be removed by the choice of potential difference and time difference. At high dose, it becomes an inactivated herbicide. Mainly used for cotton, soybeans, tomatoes, tobacco, strawberry, grapes, orchards, rubber plantations and other crops to control annual grasses weeds and some broad-leaved weeds, such as barnyard grass, horse tang, dog tail grass, amaranth, sedge, Chenopodium, etc. For example, before seedling emergence in cotton field, using 25% dicuron wettable powder 30-45g/100m2, water 7.5kg, uniform spraying soil surface, the control effect is more than 90%; for controlling Eye Vegetables in paddy field 7.5-15g/100m2, the control effect is more than 90%; for fruit trees and tea plantations, using 25% dicuron wettable powder 30-37.5g/100m2, spraying water 5.3kg at the peak of weed germination Soil surface can also be treated with soil spray after intermediate tillage.