How can rice paddy herbicides be applied for the best results?
How can herbicides be applied in rice paddies for the best results? Please advise. 1. Apply the herbicide during the period when weeds are most sensitive to it, so as to improve the weeding effect. 2. Apply the herbicide during the growth stage when rice has the strongest tolerance to the herbicide, so as to ensure the safety of the seedlings. Generally speaking, weeds are most sensitive to herbicides during the seed germination stage and the seedling stage...
How can herbicides be applied in rice paddies for the best results? Please advise.
First, apply the herbicide during the period when weeds are most sensitive to it, so as to improve the weeding effect.
Second, apply the herbicide during the growth stage when rice has the strongest tolerance to the herbicide, so as to ensure the safety of the seedlings. Generally speaking, weeds are most sensitive to herbicides during the seed germination stage and the seedling stage, when the herbicide is most likely to exert its effect; rice is most sensitive to herbicides during the bud stage and before the 4-leaf stage, and is prone to herbicide damage, so when applying herbicides during these growth stages, attention should be paid to the concentration of the preparation.
Third, the timing of herbicide application must be coordinated with the rice transplanting time. For example, to control teeth grass (Potamogeton distinctus) in rice fields with prometryn, it must be applied 15-20 days after rice transplanting, when the leaves of teeth grass turn from red to green, for the best effect. If controlling general conventional weeds, it must be applied 10-15 days after rice transplanting for the best effect. Chemical weeding in transplanted rice fields is mainly based on soil-closure treatment after transplanting, usually 3-7 days after transplanting, broadcast-applied mixed with soil or with the green-turning fertilizer, to control barnyardgrass, annual broadleaf weeds and Cyperaceae weeds. If using dichlorvos and bensulfuron-methyl, it can be applied 2-3 weeks after transplanting by draining the field and spraying.
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