Daojie is safe to rice.
Daojie is a sulfonylurea herbicide, which is absorbed by weed leaves, stems and roots and transmitted to the meristem region through xylem and phloem. Daojie is used in rice field, which has the effect of stem and leaf treatment and soil closure treatment.
After the treatment of Daojie, the weeds stopped growing quickly, the growth point faded 2-4 days after treatment, and sometimes the leaf veins turned red. 7-14 days after treatment, the stem tips and leaf buds began to wither and necrosis, and the weeds died 2-4 weeks after treatment. The death rate of weeds is related to the accumulation of branched chain amino acids in the body. Young weeds have small reserves of branched chain amino acids and die quickly; weeds with older plants and grasses die slowly, and adverse environmental conditions will slow down the speed of drug effect.
The active components of Daojie degrade rapidly in rice, which is safe for rice from 1 leaf stage to pre-harvest. It is reported that the soil closure treatment with Daojie after sowing of direct seeding rice also has a good control effect on weeds and is safe for rice.
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Which points should be paid attention to in the planting of late-planted rice in the whole field with water?
The overall requirement of late-planted rice in equal water field is to grab water and whole field to plant seedlings, increase nests, seedlings and ears. In case of precipitation or other water sources in the paddy fields with water-planted seedlings, measures such as water plugging, water diversion and pumping should be taken immediately to grab water and plant seedlings. Planting density should be increased in late planting fields. If the seedling age is 60 × 70 days, more than 13000 seedlings (8 × 6 inches) are planted in each mu of rice field, and two seedlings (2 grains) are planted in each litter; if the seedling age is more than 70 days, more than 15000 seedlings (8 × 5 inches) are planted in each mu of rice field, and the number of seedlings per mu reaches 150000 seedlings.
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Harm and Control of Liriomyza huidobrensis in Rice seed production
Rice stalk miner (ChloropsoryzaeMatsumura) is mainly distributed in Heilongjiang, Zhejiang, Jiangxi, Hunan, Hubei, Guangdong, Guangxi, Yunnan, Guizhou, Sichuan, Chongqing and other provinces in China. In recent years, it has become one of the main pests in rice production in hilly and mountainous areas of Chongqing, and the loss caused by it has exceeded that of some important pests such as borer. In rice seed production, the occurrence of Liriomyza huidobrensis seriously affected the development process of rice, which led to poor meeting of parents at this flowering stage and affected seed production.
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