For weeding of winter wheat, it is usually optional to perform the weeding operation twice in the pre-winter seedling stage and the following spring return stage. In the best weeding period, pre-winter wheat is in the 3 to 5 leaf stage, and the emergence of weeds in this period accounts for about 95% of the total number of weeds. During this period, the weeds at the instar stage have a low resistance to insecticide, which is the best time for chemical control. Effectively exert the herbicidal efficacy of pesticides, and the amount of drugs used is small, the cost will be lower, and once prevention and control can basically control the wheat-grass injury in the whole growth period, and it has the effect of getting twice the result with half the effort. The second peak of excavated weeds occurred in March of the following year, that is, the return of wheat to the beginning of jointing. The spring returning to the green period is mainly due to the fact that the weeds that failed to timely weed control and weeds occur in the early winter are more serious. For wild oats, bromegrass and plots with severe rhythm, weeding can only be used during the pre-winter time, as some pesticides currently on the market are only weeding in the 3 to 5 leaf stage of wheat and before the 3 leaf stage of weeds. best effect. Prevention technology 1. Choose the best period for prevention and treatment: After the four-leaf stage of winter wheat and before pouring frozen water, it is the autumnal period of weeds, especially the best period for the control of weeds. 2. Select the right agent: (1) For cornfields dominated by broad-leaf weeds such as sow wormwood, leeks, and wheat grass, use 10% tribenuron-methyl WP 7-gram water 30 kg spray per acre; (2) For barley-based wheat fields, 70% of pudding water with 2g plus 10g of special additives is used to spray 30kg of water; , Mu with 3% Shima oil suspension agent 17-22 ml water 30 kg spray. 3. To vigorously carry out unified defense, we must organize professional teams to carry out unified prevention and control of weeds to ensure the weeding effect. Precautions The above medicines should be used strictly according to the amount per acre and the amount of water used per acre. The medicine should be diluted twice and the medicine should be applied evenly. It should be done without re-spraying or leaking. Select sunny, no wind, the lowest temperature in the day above 5 °C and 4 days without frost and heavy rain, spray time after 9 o'clock in the afternoon after 4 o'clock is appropriate. Extreme weather, such as the cold wave, generally do not use drugs. Windy weather can not be used in order to avoid liquid drift and produce phytotoxicity to sensitive nearby crops. 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
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How to eliminate weeding in winter wheat