Key Techniques for Weed Control in Summer Maize Field

In the summer corn field, there are mainly weeds such as crabgrass, iron amaranth, gardenia, aconite, amaranth, purslane, prickly pea, coriander, green foxtail, and self-producing wheat seedlings. The average corn loss caused by weed damage is 10-30%, serious over 50%. In recent years, with the continuous promotion of the technology of corn field deforestation, the area of ​​chemical control of weeds in corn fields has been increasing year by year, but there have been problems such as phytotoxicity and poor control efficacy. Therefore, the control of weeds in summer corn fields should be based on tillage methods, soil conditions and selected herbicides to determine the control time and dosage, the technical points are as follows:

1. White sowing or stubborn sowing of corn fields, soil closure before sowing (about 1-3 days after sowing), optional amide herbicides (acetochlor, alachlor, butachlor, Propisochlor, etc.) or its compound preparations, if the soil is not closed in time or the herbicide is not effective, the stems and leaves of the weeds can be treated in the 3-5 leaf stage of corn, and the sulfonylurea herbicide can be used as the herbicide. Agents (nicosulfuron, etc.) or triazine herbicides (Atrazine, etc.). 30-45 kilograms of water per acre need to be used, the maximum dose of corn field must be used when hard seeding or soil drought, and increase the amount of water to ensure the control effect.

2. Currently, there are many types of herbicides available in the corn field, and the quality of the herbicides varies greatly. We should select the herbicides with complete three certificates and reputable manufacturers.

3, use a good performance sprayer, such as "guard" brand sprayer, to avoid the sprayer "running, running, drip, leak" phenomenon. Sprayers spraying herbicides should be as dedicated as possible.

4, spraying should be taken to reverse the way or lateral straight line, even spray, to prevent leakage spray, heavy spray and damage to the drug layer.

5. In the rainy days, windy days and noon high temperature periods, it is forbidden to use drugs in order to prevent the decrease of the drug efficacy, or to produce phytotoxicity by the drift of droplets. Within 8 hours after spraying, heavy rains occurred in the middle of the day and the amount of spray and spray should be halved.

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