The spring wheat field weeding should highlight an "early" word. Spring weeding is an important period for the control of weeds in wheat fields. Spring wheat field herbicides include tribenuron-methyl, fructose-mercury, emulsifiable concentrate, emulsifiable concentrate, 2,4-D butyl ester. In principle, it can be applied from the turning green of wheat to the beginning of jointing, but it is generally applied before the turning point of wheat and before getting up, that is, before March 15, so as to avoid adverse effects on the crop. In particular, the sooner the 2,4-D butyl ester is administered, the safer it will be.
Spring wheat field weeding to the right remedy. According to different weed species, herbicides are selected to improve the weeding effect. At present, in my county, wheat fields dominated by broad-leaved weeds such as sow plant, leeks, and rice wattles can be sprayed with 75% tribenuron-methyl (50-600 kg) per hectare with 20-27 grams of water. Wheat fields dominated by gramineous weeds such as Aegilops tauschii, wild oats, and bromegrass, with 6.9% humming oil 900--1050 ml or 3% Sema EC 125--450 ml per hectare, 450-600 kg of water per hectare Spraying for control; For wild oats and other wheat fields mixed with monocotyledonous weeds and broad-leaved weeds, 900ml of 6.9% of hummer cream can be added to each of the DuPont Superstars. Control. For serious cases of swine fever, 20% of the plots were sprayed with 750-900 ml/hectare of 450-600 kg water per hectare. 2,4-D butyl ester emulsifier is easy to produce phytotoxicity to the dicotyledonous crops such as sorghum and cotton. In particular, the stumbling crops are cotton plots that do not use 2,4-D butyl ester as the herbicide. The medical equipment that used 2,4-D butyl ester cream should also be washed repeatedly to avoid the occurrence of phytotoxicity when the dicotyledonous crop is used.
Spring wheat field weeding must strictly control the dosage. If the dose is too small, the effect of weeding will be affected, the amount of medication used will be too large, and the residual toxic and side effects will be strong, sometimes causing phytotoxicity to crops on the next crop. The dosage of 72% 2,4-D butyl ester emulsifiable concentrate is 750 milliliters per hectare; 75% tribenuron-methyl is used as the dry suspension agent (capsulant) in an amount of 20-27 grams per hectare; 75% of DuPont Superstar Dry Suspension is administered per hectare The amount of 14--20 grams; 6.9% of the application of the Thrips EC 900-1000 ml per hectare; 3% of the amount of Sema EC 25-30 ml per hectare, generally need to add 450-600 kg of water spray. Do not arbitrarily reduce or increase the dose to avoid poor weeding or phytotoxicity.
The conditions for weeding in spring wheat fields are appropriate. The use of herbicides in wheat fields should be applied from 9 am to 4 pm in sunny, windy sunny days. High temperatures, light enough to enhance the ability of the grass to absorb liquid medicine, the wind easily cause liquid medicine drift, spraying uneven, causing damage to other crops (fruit and vegetable). The optimal application temperature of 2,4-D butyl ester cream should be controlled at 15°C or higher.
Spraying should be uniform. Dilution herbicide is best to use the second dilution method, first dubbed the mother liquor, and then diluted into the liquid, spraying should be uniform, the amount of water per hectare is not less than 450 kg, once sprayed, can not be repeated spraying.
Spring wheat field weeding to the right remedy. According to different weed species, herbicides are selected to improve the weeding effect. At present, in my county, wheat fields dominated by broad-leaved weeds such as sow plant, leeks, and rice wattles can be sprayed with 75% tribenuron-methyl (50-600 kg) per hectare with 20-27 grams of water. Wheat fields dominated by gramineous weeds such as Aegilops tauschii, wild oats, and bromegrass, with 6.9% humming oil 900--1050 ml or 3% Sema EC 125--450 ml per hectare, 450-600 kg of water per hectare Spraying for control; For wild oats and other wheat fields mixed with monocotyledonous weeds and broad-leaved weeds, 900ml of 6.9% of hummer cream can be added to each of the DuPont Superstars. Control. For serious cases of swine fever, 20% of the plots were sprayed with 750-900 ml/hectare of 450-600 kg water per hectare. 2,4-D butyl ester emulsifier is easy to produce phytotoxicity to the dicotyledonous crops such as sorghum and cotton. In particular, the stumbling crops are cotton plots that do not use 2,4-D butyl ester as the herbicide. The medical equipment that used 2,4-D butyl ester cream should also be washed repeatedly to avoid the occurrence of phytotoxicity when the dicotyledonous crop is used.
Spring wheat field weeding must strictly control the dosage. If the dose is too small, the effect of weeding will be affected, the amount of medication used will be too large, and the residual toxic and side effects will be strong, sometimes causing phytotoxicity to crops on the next crop. The dosage of 72% 2,4-D butyl ester emulsifiable concentrate is 750 milliliters per hectare; 75% tribenuron-methyl is used as the dry suspension agent (capsulant) in an amount of 20-27 grams per hectare; 75% of DuPont Superstar Dry Suspension is administered per hectare The amount of 14--20 grams; 6.9% of the application of the Thrips EC 900-1000 ml per hectare; 3% of the amount of Sema EC 25-30 ml per hectare, generally need to add 450-600 kg of water spray. Do not arbitrarily reduce or increase the dose to avoid poor weeding or phytotoxicity.
The conditions for weeding in spring wheat fields are appropriate. The use of herbicides in wheat fields should be applied from 9 am to 4 pm in sunny, windy sunny days. High temperatures, light enough to enhance the ability of the grass to absorb liquid medicine, the wind easily cause liquid medicine drift, spraying uneven, causing damage to other crops (fruit and vegetable). The optimal application temperature of 2,4-D butyl ester cream should be controlled at 15°C or higher.
Spraying should be uniform. Dilution herbicide is best to use the second dilution method, first dubbed the mother liquor, and then diluted into the liquid, spraying should be uniform, the amount of water per hectare is not less than 450 kg, once sprayed, can not be repeated spraying.
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