The winter wheat in the southern region is in the stage of slow tillering or young panicle differentiation. Adequate calories and suitable soil moisture conditions are conducive to the overwintering growth of the above-mentioned crops; and rainy weather combined with barely sunlight will cause wheat seedlings to suffer from malnutrition, and the leaves will not grow too far. The plants are not as strong as white roots. In addition, continuous precipitation will also have a serious impact on the occurrence, spread, and spread of diseases such as wheat stripe rust and head blight. Therefore, we must pay attention to the prevention and treatment of frozen wheat seedlings and diseases and insect pests under cloudy rain conditions. The specific measures are as follows:
1. Based on the occurrence characteristics of wheat diseases and insect pests in overcast and rainy weather, increase the frequency of investigation and investigation of field pests and diseases, expand the scope of investigations, pay close attention to the occurrence of pests and diseases, and timely release information. In areas with large precipitation, it is necessary to use the precipitation gap to dredge the three ditch in time to eliminate the water accumulation in the field and minimize the harm caused by unfavorable weather to the growth of the broccoli.
2. The south shall timely check the seedlings, make up the seedlings, do a good job in field management before winter wheat cultivation, and actively adopt measures such as cultivating loose soil and increasing farmyard manure to increase the ground temperature and enhance the ability of crops to resist cold and prevent freezing and thawing of roots. , so that winter wheat, rape and other safe winter.
3. Covering wheat seedlings with soil, rice straw, and plastic film can prevent direct invasion of cold air and prevent freezing damage. It can also obtain anti-frost effects through smoke and other methods.
4. In view of the characteristics of outbreaks of wheat head blight caused by continuous rainy weather, in some late-maturing varieties or late-maturing wheat areas, while preventing and controlling stripe rust, triadimefon and carbendazim or thiophanate-methyl pesticides may be used. Mixed spraying and governance scab. It is necessary to pay special attention to the fact that, in view of the actual conditions of continuous raining and rainy weather, it is appropriate to increase the amount of drugs used in disease prevention and control and increase the concentration of drugs to ensure effective control.
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