Q: User zgl689 posts: Live rice is in 1 leaf 1 heart period, when began to fight the second herb? What medicine is good and there is no harm to rice?
Answer: In order to kill weeds in direct broadcast rice fields, appropriate herbs should be selected according to the field grasses. At present, the grass weeds that are often broadcast in paddy fields in our province are mainly valerian grass, Qianjin, Madang, Goosegrass, etc., broadleaf weeds and sedges mainly include duck grass, stewed vegetables, uncooked vegetables, and special-shaped vegetables. Sedge, firefly, sedge, etc.
Penoxsulam can be used to control alfalfa and broad-leaved weeds and some species of sedges. Cyhalofop- butyl oxalate and oxazolamide are used to control Qianjin, Matang, and tendon. These three drugs have good safety and can generally be applied when rice is in the 2-leaf 1 heart stage and weeds are basically released. Benzoxazole can be used to control grassy weeds such as Thousand Gold, Magnaporthe chinensis and Echinochloa crusgalli in direct seeding rice fields, and it also has good control effect on large-scale Qianjin. The safety of the drug on rice is poor, and it should be applied after the rice leaf stage and strictly control the dosage. In general, the indica rice field uses 6.9% of oxazolyl furosemide emulsion 30-40 milliliters per acre. Indica rice is more sensitive to the drug and the amount of mu should not exceed 30 ml. According to the age of rice seedlings, the appropriate amount of fenoxazole oxime and cyhalofop-butyl can be used to improve the control effect against the weeds of Qianjin and Matang and increase the safety of rice.
Antibiotics such as pyrazosulfuron and fluoxyl can be used to control broad-leaved weeds and sedges. Before the 4th leaf stage to the jointing stage of rice, the herbicides such as 2-methyl-4-chloro-, Piceaxone, and flufenoxaone may be used in addition to the malignant broadleaf weeds and sedges.
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