Since mid-June, Hunan, Guangxi, and other places have ushered in continuous heavy rainfall, and there have been torrential rains in local areas. Floods and floods have caused various degrees of impact on rice and other crops. On July 1, the Hunan Academy of Agricultural Sciences and the Provincial Agricultural Association jointly held a countermeasure meeting for experts on disaster relief and reduction of agricultural crops and proposed technical measures. Experts said that the long-term effects of rain and waterlogging, rice growth and development will be slow and weak, vulnerable to pests and infestation. Therefore, one must pay attention to the timely prevention and control of pests and diseases, and second, depending on the growth of the seedlings, the seedlings should be appropriately increased to promote seedling growth or foliar fertilizers to promote their growth and development.
Deputy researcher Fang Baohua, deputy director of the Hunan Rice Research Institute, suggested that targeted disaster relief measures should be adopted for rice in different growth stages, such as early rice and late rice.
Wax ripening period of early rice: When the flood gradually subsides, it is necessary to seize the time to clean the leaves, it is best to use a sprayer, focus on cleaning the top, that is, the top three leaves. After washing the rice leaves, immediately use 25% Ye Ku Ling or 20% Thiosenol 125 ml and spray 60 kg of water. After the flood has subsided, if it is cloudy, it will be drained once. If it is sunny, the field will still have a shallow layer of water that will be drained after the plants have been restored for 1 to 2 days. Don't artificially raise the seedlings caused by the flooding, and let them adjust automatically. At the same time, avoid spraying to the stems when washing with water. For serious rice lodging, timely rectify and clean the leaves, reduce losses, and timely harvest. .
In the early stage of young panicle differentiation of one-season rice: When the flood water receded, rice was sprayed and washed to restore rice photosynthesis. After washing rice leaves, spray pesticides to prevent and treat diseases. After timely draining, check the tips and bases in the morning. The paddy fields with dewy leaves and hard bases indicate that the rice has been restored to life. You can lightly expose the fields for 2 to 3 days, and then apply shallow water to supplement urea and potash 4 to 5 kg each. Per acre, choose to dry after 4:00 pm on cloudy days or sunny days. If the base of rice stems is soft and wilting occurs, the timely maturing and early-maturing rice varieties will be broadcast live before July 25.
In the late rice seedling stage: take the edge of the water to clean the way to clean the leaves as soon as possible after the application of pesticides to prevent and treat pests and diseases, as far as possible on cloudy or sunny afternoon after 4 pm. If there is a phenomenon of blade reeling, a shade net shall be erected in time to prevent the death of young crops.
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