Chemical weeding techniques in corn fields
First, the soil treatment: the use of "a", "a kill" control technology (that is, the soil treatment agent and contact killing agent mixed use). Soil spray treatment before seedling after sowing of maize, using 42% isopropyl sulfonium suspension agent 100-120g or 40% acetic anhydride suspension agent 150-200g or 33% pendimethalin cream 150-200ml/20g/mu % 100-150 ml paraquat water, 50 kilograms of water consumption.
In order to effectively prevent the damage of Athetis lepigone, in the pre-emergence soil treatment after sowing, 48% chlorpyrifos EC 800 to 1000 times or 80% dichlorvos 1000 to 1500 times or 40% phoxim EC was added to the liquid. 800 ~ 1000 times liquid, can effectively control the two adults and eggs of Aedes moth.
Second, stem and leaf treatment: For the corn field that has not been closed by the soil, or the soil that has been closed and treated but has poor control effect, the more weeds in the field are treated with post-emergence stem and leaf spray. In corn 2-4 leaf stage, use 4% Nicosulfuron Suspension 80ml/38g Atrazine Powder 90g/mu, or 30% omeprazole Suspending Agent 5ml/90%/mu 70 grams of suspension concentrate and 50 kg of water are sprayed on weed stems and leaves.
Third, note:
1, using the secondary dilution method. That is, the herbicide is first formulated as a mother liquor, and then diluted with water to the required concentration. The medicinal solution must be used together with it and must not be released for a long time.
2, to ensure the quality of spraying. The pesticide application should be carried out in sunny and windless weather. The amount of liquid medicine per mu shall not be less than 50 kg. The spraying shall be uniform, and the spraying shall not be repeated.
3. Organophosphorus pesticides should not be used within 7 days of the use of nicosulfuron to prevent phytotoxicity.
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