Live rice fields apply herbicides

Pilosulfuron

Pilosulfuron (Gramodeux, Mercury) is a selective sulfonylurea herbicide. The active ingredient can diffuse rapidly in water and is absorbed by the roots of weeds and then transferred to the plants. The growth of the stems and leaves of weeds and the extension of the roots are quickly suppressed, resulting in complete weeding of the weeds. It can be used to control annual weeds and part-year perennial weeds such as snapdragon, knot-knotted vegetables, stewed vegetables, calfgrass, heteromorpha sedges, and broken melon sedges, and has certain inhibitory effects on alfalfa grass and firefly.

Currently registered for use in live rice fields, 10% azosulfuron-methyl wettable powder, 10% azosulfuron-ethyl-ethylmethacrylate tablets, 10% wettable powder 10-20 grams per acre, 3-10 days after sowing, Grass 1.5 leaves mixed with fine soil application. For applying pesticides in Putian or live fields, ensure that the fields are moist or have a thin layer of water. The drug is safe for rice, but the resistance of different varieties of rice to pyrazosulfuron is quite different. The drug mist and Tanaka drainage are harmful to the surrounding broad-leaved crops and care should be taken.

When more grasses are used together with butachlor, triterpene, quinclorac, etc., the control effect is better. It can also be directly used as a compound containing azosulfuron-methyl, such as Indole (20% pyruvate WP, 1% azosulfuron-methyl, 19% pretilachlor), Shuangyi 2 (24% Pyriphidin wettable powder, containing 23.6% butachlor, 0.4% pyrazosulfuron) and the like.

2, oxadiazon

Oxadiazon (Nongsiqi, Xiecaoling) is a selective pre-emergence and post-emergent herbicide and acts by contacting and absorbing the weed seedlings or seedlings with the drug. Post-emergence application, weeds are absorbed through the ground. After the chemicals enter the plant, they accumulate in vigorously growing parts, inhibit growth, and cause the weeds to rot and die. Only in the light conditions to play grass killing effect. After field application, the liquid quickly spreads on the surface of the water and is quickly absorbed by the soil. Therefore, the downward movement is limited, it will not be absorbed by the roots, and the metabolism in the soil is slow. Can effectively control valerian, thousand gold, cattle blankets, shaped sedge, Houttuynia, Rizhao grass, beech grass, rain long flower, Alisma, festival grass, false leeks, water leeks, water teeth, Siye Ping, can significantly inhibit the eye dishes, dwarf mushroom, firefly and so on.

Dry rice fields can be sowed before sowing or until rice grows to a leaf stage and weeds at a time of about 1.5 leaves. It uses 25% Nongsiti EC 100-200 ml, or 25% Nongsi EC 70-150 ml. Add 60% of Machet EC 70-100 ml, add 45-60 kg of water into the liquid and evenly spray. It can also be used as a compounding agent, such as Fortune (60% dimethoxane EC, containing 10% oxadiazon, 50% butachlor), 36% dimethoate EC and the like.

3. Phenyldanacetamide

Phenyldanacetamide (cyclochloramine) is a selective systemic herbicide, which is mainly absorbed by the buds and roots and transmitted through xylem and phloem to young shoots and leaves of weeds to prevent cell division at weed growth points. Stretching, eventually causing the death of the plant. Because of its low solubility in water, it has the highest herbicidal and herbicidal activity under water-holding conditions. The soil has a strong adsorption capacity to this product. After application, most of the drug is adsorbed on the surface of the soil and forms a treatment layer within 1 cm of the surface of the soil. This prevents contact between the growth point of the rice and the pesticide, making it highly productive. It is safe, but it has strong ability to prevent growth and killing of weeds such as weeds that grow on the surface of the soil, and it also inhibits the perennial weeds that grow on seeds in the surface layer, and has a low effect on deep weeds. When it is used, it should be used in fields where there is a lot of water, and sandy soil and drained land are used poorly.

In order to broaden the spectrum of grass weeds, it should be used in conjunction with Nong Tak or grass killers. After application, keep 3-5 cm water layer for 5-7 days. If there is water shortage, water can be slowly replenished, and water can not be drained. The water layer floods the rice leaf and it is easy to produce phytotoxicity. It can also use its compounding agent, such as Kaye (50% phenylthiazolyl benzyl WP, containing 47% phenyldanmidum, 3% Bensulfuron-methyl), Keshan Huan (68% Benzyl benzyl) Wet powders, containing 64.8% mefenacetamide, 3.2% Bensulfuron) and the like.

4, Haocao Dan

Herbal dan (Diancaodan, Dicaodan, Straw End, and Tiantian) is a carbamate-selective, system-entraining, soil-enhanced herbicide that is absorbed by the weed roots and shoots, especially shoots. After absorption, it is transferred to the plant and has a strong inhibitory effect on the growing point, resulting in the germination of weed seeds and weeding in the early stages of germination. Herba Sophorae absorbs the transmitted alkaloids faster than rice, but it degrades alkaloids slower than rice, which is the physiological basis for the formation of selectivity. Such herbicides can be rapidly adsorbed by the soil, and thus are leaching with water, and are generally distributed at 2 cm above the soil surface. Soil adsorption reduces the losses caused by evaporation and photolysis. It can be used to control alfalfa grass, calfgrass grass, exotic sedges, amethyst gold, Trichosanthes falcate, and abalone, etc. It has poor effect on trifoliate grasses. After transplanting seedlings, water and direct seeding fields, and paddy field, after the application of pesticides, care should be taken to maintain the water layer, and the emergence of rice should not be used until the emergence stage, otherwise it will cause injury.

Alfalfa can be used in combination with 2 A 4 chlorine, bensulfuron-methyl, pyrazosulfuron-methyl, propanil, etc. to increase the herbicide spectrum, but it cannot be mixed with 2,4-D, otherwise it will reduce the herbicidal effect. Can also choose to use the compound containing valerian, such as cleopachlor (50% benzyl, hydrazine WP, containing 49% valerian, 1% bensulfuron-methyl), live straw grams (36% quinone, benzyl can be Wet powder, containing 1% bensulfuron-methyl, 35% valerian, etc.

5. Cypromisulfuron

Cysulfuron-methyl sulfonamide compounds can be absorbed by the weed roots and leaves, conduct in plants, stop cells from dividing, and finally cause weed death. After treatment with stems and leaves, sensitive weeds ceased to grow, and the color of the leaves turned green. According to different environmental conditions, the weeds would die completely after a few weeks. This medicine can be used for transplanting Honda. It can also be used to control broad-leaved weeds and Cyperaceae weeds in direct-seeded rice fields, such as duckweed, rain longevity, Alisma, bovine felt, dwarf mushroom, and exotic sedge, etc. At the same time, it has a good inhibitory effect on alfalfa, and it also has a strong inhibitory effect on perennial grasses and weeds.

Currently registered for use in rice fields, there is a golden autumn (10% cypromisulfuron wettable powder), which can be applied within 2-15 days after transplanting or sowing of rice. The weeds are most sensitive to the 1.5-2.5 leaf stage. Weeds at the 3rd leaf stage are ineffective and use 10% wettable powder 10-20 g per acre. The use of golden autumn and field surface in live broadcast fields must be maintained in a wet or mixed state. Whether it is transplanting fields or direct-seeding fields, and maintaining the water layer is conducive to the exertion of medicinal effects, after the general application, the water layer should be kept 3-5 cm, and water should be kept for 5-7 days. After the autumn season, it can quickly adsorb on the surface of the soil and form a very stable drug layer. The leakage of rice fields, flood irrigation, string irrigation and heavy rain can still obtain good efficacy. In order to expand the spectrum of killing grasses, Golden Autumn can be used in combination with Da Zhuang, Machette, and Quick Killing.