What should we pay attention to when the long summer comes?

After a long summer, the management of rice planting and other spring sowing crops has also entered a busy season.

But we should also pay attention to prevent the damage caused by the characteristics of solar terms to crops. After the long summer, Jiangnan entered the rainy season, and the rainfall and rainy days increased significantly. Continuous rainy days not only caused wet damage to crops, but also led to the prevalence of many diseases. Wheat is most susceptible to scab at heading and flowering stage. If it is expected that there will be warm but rainy weather in the future, it should be sprayed in time from the beginning of flowering to the full flowering period. Cotton in southern China usually causes anthracnose, damping-off and other diseases under the weather conditions of continuous rain or sudden warming and cold, resulting in large-scale dead seedlings and lack of seedlings. Necessary measures to increase temperature and reduce humidity should be taken actively, combined with chemical control, in order to protect seedlings and strengthen them. "There are many kinds of seedlings in the long summer, and more millet is harvested in Man Cang". It is a good season for early rice transplanting in the north and south of the Yangtze River before and after the long summer. "full moon seedlings can be planted, but full moon grass can't be planted." At this time, the temperature is still low. Management should be strengthened immediately after transplanting, and early topdressing, early ploughing, early pest control and early development should be promoted. Sowing mid-season rice should be timely. At this time, the spring shoots of tea trees developed rapidly. If there is a slight negligence, tea will age. As the saying goes, "Grain Rain harvests less, but keeps picking in summer", so we should concentrate on picking in batches.

Before and after the long summer, although the temperature in North China and Northwest China rose rapidly, the precipitation was insufficient. In addition, the wind is strong and evaporation is strong in spring. Atmospheric dryness and soil drought are the key factors that seriously affect the normal growth of crops. Especially, the dry-hot wind before and after wheat filling and milk ripening is an important disastrous weather that causes yield reduction, and timely irrigation is a decisive step in drought resistance and disaster prevention. "hoes are everywhere for three days in the long summer", when weeds breed very quickly. If you don't hoe for one day, you won't hoe for three days. Tillage and weeding can not only eliminate weeds, resist drought and waterlogging, but also increase ground temperature and accelerate soil nutrient decomposition, which also plays a very important role in promoting the robust growth of cotton, corn, sorghum, peanuts and other crops at seedling stage.