Strengthen the Integrated Management of Water and Fertilizer to Control Pests

The quality of transplanting in the main producing areas of the middle and lower reaches of the Yangtze River this year is good. After the planting, the temperature is high and the illumination is sufficient. The occurrence of tillering is fast and the number of groups is sufficient. At present, the overall growth is good. However, Guangdong, Guangxi, and other provinces (districts) have no rain and drought during the spring and summer, and some paddy fields delay transplanting due to lack of water. After transplanting, it encountered low temperature and rainy weather, and the occurrence of childbirth was slower. Individual growth was not enough. Spike differentiation was delayed compared with previous years, and seedling growth was worse than usual. Therefore, it is very important to manage the field of early rice in the middle and later stages according to local conditions. Experts suggest that we should start from the following two aspects. First, we must strengthen fertilizer and water management. To do a good job to see the diagnosis of seedlings, appropriate timely application of panicle fertilizer, in particular, to increase phosphorus and potassium fertilizer. For early rice fields with good growth, they should use less or no panicle fertilizer in the middle and later stages, and should mainly use grain fertilizers when applying them. For rice fields with poor early growth potential, panicle fertilizer can be properly applied to promote flower-fertilizer-based production. At the same time, the foliar fertilizer was applied at the heading stage to prevent premature degeneration of the leaves. For water management, the irrigation principle of shallow water booting, water heading, and wet and dry seeds should be adopted. During the grain-filling period of rice, it should be filled with water for 5-7cm at a time. After two or three days of natural dryness, it should be filled with water. Cut off water 5-7 days before harvest and do not cut off water prematurely. Early winter rice or green manure in the middle and lower reaches of the Yangtze River should pay attention to the drying field and intermittent irrigation, and see seedlings and grain fertilizer; early spring rice seedlings should see early earing fertilizer, in order to promote tillering and ear development, In the struggle for full-spike based on the main attack and increase the seed setting rate. The growth and development of early rice in southern China has entered the booting stage, and the key point in production is to strengthen the management of later-stage water management. Intermittent irrigation is the main method, and one or two foliar fertilizers can be appropriately applied. Second, we must comprehensively prevent and treat pests and diseases. This year, the task of prevention and control of pests in the early and middle stages of early rice in southern China is heavy. In addition to the re-emergence of rice locusts, the situation of rice planthoppers is severe. Early rice leafhoppers have emerged in Fujian and Jiangxi provinces. Rice leaf roller producers in southern China moved about 7 days earlier than last year and 10-12 days earlier than usual. . After entering June, there will still be a large number of rice migratory pests in the main producing areas. Therefore, in the field management at the middle and later stages, the agricultural departments of all localities must strengthen the comprehensive prevention and control of pests and diseases, closely monitor the occurrence and development of pests and diseases, timely conduct pest monitoring and early warning and prevention and control, reduce losses, and ensure a good harvest.

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