Winter rape chemical weeding effect is good

Chemical weeding is an important technical measure to seize the high yield of rapeseed. In recent years, with the continuous updating of rapeseed varieties, the reform of cultivation measures, the improvement of fertilization levels, and the expansion of rapeseed planting areas, the production level of oil menus in our province has greatly improved. However, the damage caused by weeds in the fields is also getting worse. Therefore, effective control of weeds is a top priority in rapeseed production. The chemical weed control effect of rape is above 90%, which is about 20% higher than that of manual weed control. Since chemical weeding is not like manual weeding to loosen the soil, the roots of rapeseed are firm and the lodging rate is reduced by about 30% compared to manual weeding, and 20 to 30 kilograms of rapeseed can be increased per mu, which is well received by the farmers. At present, the coming winter season must focus on the types of weeds that occur in the field. We must conscientiously do a good job of chemical weeding in transplanting fields, direct-seeding fields, and no-tillage fields to lay a solid foundation for harvesting bumper crops after the year. In order to control the chemical resistance of hybrid seedlings such as aphid weeds in winter rape fields, we can choose to use contact-killing herbicides to stabilize and kill, catch and net, cover grass energy, grass weed, horses, and horses. Oh, wait. The time for chemical weeding is best for weeds in the 3 to 6 leaf stage, and the spray concentration used is: 15% of the finely stabilized EC, 10% of the weed, and 12.5% ​​of the herb can be 50-70 ml per mu. , Add 50 ~ 60 kg of water spray, control effect of more than 90%, can basically control weed damage. These kinds of agents are more resistant to rain, and it rains after 2 hours of application, which has no effect on efficacy. The high temperature has a good weeding effect. When the average daily temperature is lower than 10°C, the plots with poor seedling quality should be given more attention to produce phytotoxicity when they use nets to catch and subtilis. Kotak is a selective herbicide post-emergence rapeseed, which can be used to control dicotyledonous broadleaf weeds in rapeseed fields and is an ideal herbicide in rapeseed field. The control of broadleaf weeds such as Bradychus cuspidatum, Cinnabardia, Poria pilaris and Veronica sp. The use of Grotek depends on the type of rapeseed and the weeding law of the field weeds. According to the occurrence of weeds, B. napus varieties are applied in early December and mid-February. Before the end of November, pesticides are easy to produce. Generally, 50% of high-tech grams per acre are used for 30-35 ml. Water is added to 50 kg of stems and leaves. Spray, the temperature above 10 °C play a faster effect. Before and after the rapeseed direct seeding and transplanting period, most areas of our province have suffered from drought and rain, affecting the growth of rapeseed. For rape fields with poor drought and drought, the soil should be kept in conjunction with irrigation to maintain a certain degree of lyricism, so as to ensure efficacy.

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