First, chemical weed control and armyworm 1, the choice of herbicides and pesticides and with. The herbicide of corn field is the first herbicide to be used in combination with other herbicides. The herbicide that can be used is atrazine, but the amount should not be too large and it needs to be mixed with other herbicides. The herbicides that can be used together are mainly acetochlor, dole, sisinjin, etc. The formula is to mix 40% atrazine 100g with a certain dose of another herbicide, and the herbicide dosage is 48 % 100 to 150 ml of cable, 75 to 100 ml of 50% acetochlor, 100 ml of 33% herbicide, and 75 ml of 72% dole. A plot of fine grass can add 20% paraquat 200 ml or Roundup 200 ml per mu. When herbicides are used everywhere, appropriate insecticides should be added to eliminate armyworm larvae that are left in the field. Dimethoate can be used to add 100 ml per mu. 2. Chemical weeding and insecticidal methods. 1 mechanical spraying. The above herbicides, pesticides and 60 kg of fresh water were mixed and dried, and the soil was sprayed on the surface of the seedlings before drying. The soil was closed. The spraying machinery was driven at a certain speed, and no re-spray or leakage was allowed. Will cause excessive use of drugs, resulting in the death of the next stubble wheat, the latter can not reach the purpose of weeding. 2 sprinkler irrigation. Wet soil has a good chemical weeding effect, and the soil dry and weeding effect is reduced. Therefore, after spraying, a further sprinkler irrigation is performed, and the weeding effect is very significant. It should be noted that spray irrigation must be performed 8 to 10 hours after spraying, otherwise it will affect the effect. 3. Control armyworm. After emergence, if the pests are seen, prevent and treat them immediately. In the mid-maize stage of growth, weeds should be carefully controlled to prevent and control the damage of three generations of armyworm. When 10 weeds per hundred square meters or one hundred corn borer populations reaches 30 on field weeds are controlled. 4. Prevent corn borer. The major pests of corn are armyworms and armyworms, except for armyworm. The methods of prevention and treatment are as follows: Early or ethyl "1605" 500g plus water 2kg, and 25kg of slag can be used as granules, spread in the heart and leaves at the end of the heart. , can also be put Trichogramma bees to the field 1 to 2 times, acre put a bee amount of 0.8 to 10,000 heads, put the bee period in the beginning of adult oviposition. Second, topdressing due to no-tillage coverage of summer corn base fertilizer is insufficient, so it is necessary to timely fertilizer after Dingmiao, and promote seedlings early hair. The remaining part of the total amount of nitrogen fertilization plan for all fertility plan to follow, top dressing method can choose to use corn cultivator topdresser. Pay attention not to pressure seedlings, not to hurt seedlings. Third, the autumn flooding with slurry water has a great impact on summer maize. If the weather is fine and little rain after mid-August, we should pour slurry water in time. During this period, the corn stalks are high-leaf and the irrigation is not easy to do with water, and the nozzle positions should be changed frequently. Improve uniformity. Fourth, timely harvest of summer corn harvest to consider the maturation of corn and the appropriate sowing of autumn sowing of wheat in two aspects. At present, the maize harvest period is still early in production, and it should be ensured that there is a grain filling period of 47 to 50 days from the pollination of the silk to the harvest.
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