Q: Li Xuming, Daxu Town, Tongshan County: Rice seedlings in dry conditions are in the 2-leaf stage, and there are many weeds in the 1 leaf and 1 heart stage in the field. In the early stage, after the rice was sown, it was treated with pretilachlor to seal the soil. Can it be controlled with precamine again now?
Answer: Pretilachlor is a selective pre-emergence treatment, which is usually applied within 2-4 days after rice is sown. Pretilachlor also has a certain control effect on young grass weeds, and the control effect of grass weeds over 1 leaf is reduced. The above fields should be controlled by the combination of quinclorac and azosulfuron-methyl or bensulfuron-methyl in the 2-leaf 1 heart stage of rice. The quincloracic acid and pyrazosulfuron-benzisulfuron are both combined. Stem and leaf treatment and soil sealing treatment. Penicillin can also be used according to the grassy phase using a mixture of penoxsulam (Ojachi) and its combination with cyhalofop-butyl (herbal).
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