According to a field survey conducted on May 18, hybrid rice such as Guiliangyou 2 and Teyou 582 have reached the third phase of differentiation, and other varieties such as Tianyou 998, Fengliangyou 1, Zhongzheyou 1, etc. One after another into the young spike differentiation. According to the development of young panicle development, the mid-late-maturing varieties will enter the stage of flowering and flowering at the beginning of mid-June to the beginning of the next period. At present, it is the key period for the management of rice in the middle and later stages. The core content of field management at this stage is to cultivate roots and protect the leaves. The management during this period has a direct impact on the level of rice production. Therefore, the time to seize the opportunity is to focus on fostering strong roots. The central part of the pole and protect the leaves should focus on the field conservation measures centered on the prevention and control of exposing the fields and pests and diseases, supplementing potash fertilizer and micro-fertilizer at the right time and in appropriate amounts, and the conservation measures in the field can be implemented to achieve high yield and yield of rice. First, moisture management - repeated exposure to the sun, improve the late root activity At present, rice has entered the stage of young panicle differentiation, especially after the first stage of dew-curing, the leaf color of early rice seedlings has changed from dark green to blue green, and some of them have already turned to blue. Therefore, in the middle and later stages, dry and wet irrigation should be the main method. Improve the root activity in the later period, repeat repeated light exposures before heading, maintain shallow water layer during heading and flowering stage, and intermittently water after hooking the head. After the water is not visible, the water is mainly wet, and the wax is ripe and wet and dry. In the first 7 days or so, the water is drained and drained. It is necessary to prevent the water from falling off too early, avoid the blue and dryness, and reduce the weight of the grain. It is also necessary to prevent the water from being poured too deeply, resulting in the soft lodging of the pole. Second, timely and appropriate amount of potash fertilizer and trace fertilizer, promote clubs, leaves, thick, straight Young ear differentiation 2-3 at the beginning of the period, see the situation of applying 10 kg of potash fertilizer, a good plot of nitrogen removal, or a field with fertilizer deficiency can increase the amount of compound fertilizer, and the dosage will vary depending on the situation. In the range of 10 kilograms, avoid partial application of nitrogen fertilizer to prevent late-stage greediness and even lodging, affecting the rate of seed setbacks. In addition, three roots can be fertilized from the fifth ear to the heading stage. Each time, 50 grams of phosphorus and potassium are used, and 10 mg of zinc is used to spray 50 kilograms of water. This promotes the firmness of the stem, leaf size, and thickness. , Use this method to improve the fruiting rate effect is obvious. Third, do a good job of pest control The major diseases and pests that occurred in the early and middle stages of development were rice blast, sheath blight, rice leaf roller, rice borer, rice planthopper and rodent pests. The main control measures were as follows: 1. Control of rice blast After entering the high temperature and high humidity weather in May, the seedlings grow thick green and there are rice leafhoppers in many places, especially susceptible rice varieties and fields with high fertilization levels. Special attention should be paid to the prevention and control of rice blast. Control agent: Tricyclazole, Trimethoamine, Rice disease enemy, Minbi, Ziboke, etc. 2. Control of sheath blight Since mid-May, the increase in rainfall and high humidity in the field have been extremely beneficial to the occurrence of sheath blight. In the middle and early June, it was the epidemic period of sheath blight and should be controlled in the middle and early June. Control agents: Ai Miao, Le Miao, Propiconazole, Jinggangmycin, Rhizoma Imperatae, etc. 3. Control of rice leaf roller Rice leaf roller is harmful to the rice leaf, especially the flag leaf will seriously affect the photosynthesis of the leaf, and the damage will have a greater impact on the yield. Control agents: Ruijinte, Keshengdan, abamectin and so on. 5. Prevention and treatment The period from the beginning of June to the middle of the month is the period of prevention and control of Sputum Warts (special prevention and control will be based on the local pest monitoring report). Control agents: Avi. Chlorpyrifos, Rui Jin special, Ke Shengdan, insecticidal Dan and so on. 6, control of rice planthoppers With the arrival of the rainy season and the harvest of rice in Southeast Asian countries, it is particularly beneficial for the migration and mass reproduction of rice planthoppers. Prevention and control are of great significance both to the production of early rice crops and to the control of southern rice black streaked dwarf disease. Anti-drugs: Lesiben, scorpion net, rice indole, nitenpyram, pymetrozine and so on. Pvc X-Ray Thread,Operation Pvc X-Ray Thread,Medical Pvc X-Ray Thread,Surgical Operation X-Ray Thread Shaoxing Weijian Medical Supplies Co.,Ltd. , https://www.wetourmedical.com