Most of the weeds are unearthed after the fall of 3 leaves in autumn, and the grass is poorly resistant to chemicals. It is a favorable opportunity for chemical weeding. One control can basically control the wheat field damage, and it has little impact on the crops. It is necessary to seize this favorable opportunity to carry out chemistry at the right time. weeding.
In recent years, weeds in wheat fields have become heavier and the community has undergone major changes, especially in grasses and resistant dicotyledonous weeds in local plots, which are difficult to control. The plots based on dicotyledonous weeds can be treated with 75% bensulfuron-methyl dispersible granules or 15% thiasulfuron-methyl WP, and 20% chlorofluoropyridyl can be used for resistant dicotyledonous weeds. Oxyacetic acid (to make it) emulsifiable concentrate or 5.8% difluoro-oxazolamide (Maixi) emulsifiable concentrate; 3% methyl disulfuron (Shima) emulsifiable concentrate for monocotyledonous weeds-based plots Or 70% flucarbazone (scorpion tiger) water dispersant for control. The plot where the dicotyledonous and monocotyledonous weeds are mixed can be mixed with the above agents. Chemical weeding should pay attention to two problems: First, strictly use the recommended dosage. Second, it is forbidden to use herbicides that have phytotoxicity to the later crops. It is forbidden to use chlorsulfuron or metsulfuron in the plot of corn.
Plots damaged by underground pests may be sprayed with 50% phoxim emulsifiable concentrate at the base of the stalk, or with 5% phoxim granules. In addition, it is necessary to pay close attention to the occurrence of major pests and diseases of wheat, such as Laodelphax striatellus and sheath blight, and make timely prediction and comprehensive prevention and control work.
In addition, it is necessary to pay close attention to the occurrence of major diseases and insect pests of wheat such as spider mites, ground tigers, wheat stubble, Laodelphax striatellus, sheath blight and total eclipse, and timely forecast and comprehensive prevention and control work.
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