One-time killing and sealing mixed herbicide for rice direct seeding field and method

Abstract

The invention discloses a one-time killing and sealing mixed herbicide for a rice direct seeding field and a method. According to the method, 10-12 mL of 19% triafamone suspension agent + 4-5 g of 75%halosulfuron-methyl water dispersible granule + 100-120 mL of 20% cyhalofop-butyl water emulsion or 90-100 mL of 10% metamifop emulsifiable concentrate + 80-100 g of 70% propineb wettable powder areused per mu, 20-40 kg of water is added, the stem and leaf treatment is carried out by a spraying manner at the 4-5 leaf stage of rice, and killing and sealing are combined, simultaneously carried out, and completed once. According to the method, the "one-sealing second-killing third-supplementing" three operations is changed to "killing the early weed and sealing the late weed" one-time medication to control the grass damage of the whole growth period, the four effects of "weeding, pest controlling, seedling raising, disease prevention" are simultaneously achieved, the labor is saved, the cost is reduced, and the efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of rice planting management, more specifically, it relates to a one-time killing and compounding herbicide for direct-seeding rice fields and a method thereof. Background technique [0002] Rice planting is generally divided into three categories: direct seeding, seedling throwing, seedling raising and transplanting. According to the difficulty of weed control, the order is direct seeding, seedling throwing, seedling raising and transplanting. At present, the rural labor force is going out and the aging population is getting worse. Many farmers have begun to choose the way of direct seeding of rice. [0003] Rice direct seeding is a cultivation method in which seeds are directly scattered on the field. Compared with transplanting rice, it is more cost-effective, lighter and simpler, saving time and labor. Rice direct seeding can save a lot of labor, which is of great significance to realize light and larg...

AI Technical Summary

Problems solved by technology

[0006] 2. Long weeding time and high density: the weeding time is 30-40 days. Weeds generally emerge 3 days after rice sowing, the first weeding peak appears 7-15 days after sowing, and the second peak appears about 20-25 days after sowing. two grass peaks

[0007] 3. Serious damage: After rice is sown, due to the poor environment, the seedlings grow slowly and thin, while weeds have strong adaptability, large living space, and fast growth; moreover, the resistance of weeds in the field is getting higher and higher, causing harm to the growth of seedlings , and even the phenomenon of weeding failure

In addition, in the third stage of picking and supplementing, the weeds are older, and there are more resistant malignant weeds, the cost of medication is higher, and the effect cannot be guaranteed.

[0014] 2. The number of medications is high, the cost of medication and labor costs are large, the efficiency is low, and the effect cannot be guaranteed

The field grass has complex facies, various types, different resistance and poor control effect

[0016] 4. There are many types of weeds, high density and serious damage

Moreover, the weeding time is as long as 30-40 days, the application period is short, and it is difficult to grasp the technical operation.

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