1, 1 Pesticides such as bensulfuron-methyl wettable powder, acetochlor, pyrasulfuron-methyl, butachlor
1, 1 Pesticides such as bensulfuron-methyl wettable powder, acetochlor, pyrasulfuron-methyl, butachlor, pendimethalin and butralin are used in closed paddy fields. 2. For the second time, 7- 10 days after rice planting, pesticides were applied after the seedlings survived. You can choose bensulfuron-methyl, pretilachlor, butachlor, weeds, butachlor, bensulfuron-methyl, pretilachlor and other drugs. 3. Weeds in rice fields can be basically well controlled after two closures.
1. What medicine was used to seal the paddy field for the first time?
1, paddy field 1 closure can use bensulfuron-methyl ipratropium wettable powder, acetochlor, pyrasulfuron-methyl, butachlor, pendimethalin, butachlor and other pesticides. When applying pesticide, it should be carried out in sunny days. After mixing, it can be sprayed directly with a sprayer, and the water depth should be strictly controlled when applying drugs.
2. The second enclosure is mainly at 7- 10 days after rice planting, and it can be applied after the seedlings survive, and bensulfuron-methyl can be used. Thionine, pretilachlor, butachlor, weeds? Butachlor, bensulfuron-methyl? Prochloraz and other chemicals, and benzyl can also be used for artificial transplanting of rice? B, performing soil sealing treatment. The second closed weeding is very important. If the weeding work is done well this time, weeds can be basically controlled and the growth of rice seedlings will not be affected to some extent. Therefore, it is necessary to select a safe and effective herbicide or herbicide combination for the second closed weeding, and then adopt scientific dosage and application method in the corresponding period.
3. Generally, weeds in rice fields that have been sealed twice can be basically controlled. It should be noted that weeds occur in fields with water leakage or poor water retention or fields that reach the control threshold due to abnormal weather and other reasons. At this time, it is necessary to spray weeds on the stems and leaves. Murder? . At present, quinclorac, cyhalofop-ethyl, penoxsulam, bispyribac-sodium, pyrimidixim-ethyl, oxadiazole, bentazone, dimethyl carbon tetrachloride and so on can be selected as herbicides in rice fields.
2. Will it rain after the rice fields are sealed?
1, if the rainfall is small, it will not have a great impact, but it will also be beneficial to the efficacy. If the rainfall is heavy, it will generally have a greater impact, because the herbicide will sink with the rain after the heavy rain, and the seeds may be poisoned when they come into contact with the absorbed drugs, resulting in phytotoxicity. Because the liquid medicine sinks quickly, there may be insufficient contact between the liquid medicine and weed seeds, and the drug effect will be weakened. At this time, different kinds of herbicides must be sprayed.
2. Paddy field sealers are generally used after sowing, before or after emergence. When using drugs, we must pay attention to the choice of drugs according to the local climate and terrain. For example, acetochlor cannot be used in cold areas in the north, and drugs such as butachlor and oxyfluorfen cannot be used in uneven areas. The dosage of the drug must be prepared according to the instructions for use, and it cannot be used excessively.
3. Using blocking drugs has many advantages, such as reducing the number of weeds. If the base number of weeds is relatively large, the leaf age will be relatively large, so some weeds will be covered at the bottom, and the weed control effect will be affected. Moreover, a large number of weeds will rob rice of more nutrients, leading to poor growth of rice seedlings.