Scientific use of corn field post-emergence herbicides
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First, the dispensing method
The medicine must be shaken well before use, and the second dilution method should be used to water 25-30 kg/mu and spray evenly. When the weeds in the corn field are too large and too much, or there are many malignant weeds such as fragrant aconite, snail, and small scorpion, the dosage and water consumption can be appropriately increased.
Second, the period of application
For corn varieties suitable for drug use, it can be sprayed in the whole field of corn 3-5 leaf stage and weed 2-4 leaf stage, and the effect is best; the corn growth point should be avoided when spraying the corn 6-8 leaf stage. For prospective weed spray, it is recommended to wear a protective cover in front of the nozzle to avoid damage to the corn caused by improper operation. Herbicides can no longer be used after the 8 leaf stage. It should be avoided to use high temperature and strong sunshine at noon or high temperature or windy weather for 3 consecutive days. It is best to apply before 9-10 am, especially after 4-5 pm.
Third, matters needing attention
1, herbicides generally can not be re-sprayed and increased doses, even if the leakage spray can not make up the spray, easy to cause phytotoxicity.
2. Do not use organophosphorus insecticides within 7 days before or after mixing with organophosphate insecticides or herbicides to avoid phytotoxicity. Can be mixed with pyrethroid insecticides.
3. Rain within 8 hours after application will affect the effect and need to be re-sprayed.
4, under abnormal conditions, such as high temperature, high humidity, drought, low temperature, muddy and other conditions should not be used.
5. The soil will affect the weeding effect within one week after application. Do not spray when the corn leaves are exposed to dew or rain. Diseased seedlings and weak seedlings should not be used.
6. It is strictly forbidden to use a motorized sprayer to spray herbicides. The water consumption per mu is not less than 25 kg.
7. Sweet corn, smashed corn, seeding and self-crossing fields should not be used.
8, the occurrence of phytotoxicity should be immediately watered, while spraying gibberellin, Ai Zengmei or Shuofeng 481 to relieve the phytotoxicity, seriously consider the destruction of other crops.