Jiayou sent a WeChat on November 17th: I'm from Danji Town, Tongshan District, Xuzhou City. The wheat was sown at the beginning of November. Now the wheat seedlings are in the 1 to 2 leaf stage. The grass just emerged. Can herbicide be applied before? Is there a low temperature requirement for medicine? Isoproturon, methylsulfuron, oxazoline oxalate which effect is better? Before sowing, wheat was sown with 50% acetochlor 200 ml plus water 25 kg per acre for soil closure treatment. There was no effect, and the grass was still dense. Acetochlor is a soil-enclosed treatment agent, which has good control effect on wheat fields and grasses. According to the reports of Danyang Agriculture and Forestry Bureau Xia Shuzheng and others, before the seedlings of wheat, 50% acetochlor EC 100 ml plus water was sprayed on the hand to control and control the grass. After 60 days of application, the fresh weight control effect reached over 85%. Effectiveness is more than 88%. In the production, acetochlor can be used to close the soil before seedlings of wheat to control the grass which may be resistant to fenprofen. Wheat is more sensitive to acetochlor, and there is currently no acetochlor single agent registered for weed control in wheat fields. Acetochlor is used for soil sealing treatment in wheat fields. The amount of drug can not be too large. It can be mixed with isoproturon, bensulfuron-methyl and thifensulfuron. When mixed, generally use acetochlor pure drug 15 to 40 grams per acre. Note that there should be no accumulation of water or humidity in the field after application, especially if there is no accumulation of water for a long time, otherwise it will cause phytotoxicity to wheat. The use of acetochlor-containing herbicides in wheat fields should be preceded by a gully system to ensure that no water accumulates in the field before the application of wheat seedlings and avoid application of pesticides before rain. After the application of the rain, it should be drained and dampened in time, and no water can accumulate in the field. Before sowing, wheat is planted with 50% acetochlor and 200 kg of water per acre for soil closure treatment. The amount of pesticide used is relatively large, and the grass should have better control effect. When the application of pesticide is not appropriate, it will be more likely to cause injury to wheat seedlings. . There is still a large amount of grass unearthed after application of the above fields, which may be related to improper application of pesticides, soil drought and other factors. According to historical weather information, from November 1st to 20th, Xuzhou and other places did not have a large rainfall process, and only a brief light rain occurred on November 17. No rainfall has always led to soil drought, thus affecting the control effect of acetochlor on weeds such as weeds. Isoproturon, methylsulfuron, and oxazoline oxalate are suitable drugs for controlling wheat field and grass. Isoproturon has both soil sealing and stem and leaf treatment effects. Applying it at the 1 to 2 leaf stage of wheat not only has good control effect on the already-grown alfalfa, but also can seal uncultivated alfalfa. The application of isoproturon will reduce the antifreeze ability of wheat seedlings, and the low-temperature frost weather will not occur in the short term after application, otherwise it will easily cause “frozen phytotoxicity†to wheat seedlings. The oxazoline oxalate has only stem and leaf treatment effects. Generally, after the two-leaf wheat stage, the weeds are basically released and are applied at the time of the 2 to 4 leaf stage. When the sorghum is first emerged, it can only control the grass that has already emerged. In the future, there will be grasses unearthed and need to be applied again. After the application of pesticides should also be avoided as much as possible to cool down the cold weather, so as not to cause adverse effects on wheat seedlings. Methylsulfuron has better control effect on wheat field and wheat grass, and it is controlled after applying wheat at the 3-leaf stage. It is easy to cause drug damage to wheat seedlings when applied too early. The drug has high requirements for the application of pesticides and should be strictly followed according to the product instructions. After a short period of time, the drug can easily cause damage to the wheat seedlings. Isoproturon, methylsulfuron, and oxazoline herbicides have better safety for wheat seedlings when applied at higher temperatures, but can also be applied at low temperatures, as long as there is no significant temperature-reducing weather after application, generally no It has caused too much adverse effect on wheat seedlings. According to the 15 day weather forecast, although the minimum temperature in Tongshan and other places is relatively low at 0~5°C, the maximum temperature is not low. At 11~14°C, the average daily temperature is above 5°C; and there is no large amount in the past 15 days. Amount of cooling weather. Under these weather conditions, the above three drugs can be applied to control wheat fields and wheat fields. Disclaimer: Some articles in this website have been transferred from the Internet. If you are involved in third party legal rights, please inform this website. phone We are a specialized manufacturers of Animal Health Raw Materials from China; We support Animal Feed Additive, Animal Insecticidal ingredients, Xylazine Powder, Annatto Seed Extract and so on. With advanced R & D and manufacturing in Animal Health Raw Materials. With high-quality products of Animal Health Raw Materials, we can be a trust suppliers / factory. 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