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In late September, beware of the fifth generation of Samui
Late rice has more diseases and insect pests at the earliest stage, and damages are also more serious, often resulting in reduced production due to lack of timely control. Prevention and control of pests and diseases at the earliest stage is the key to late harvest. The main pests and diseases occurring in the ear stage are three diseases and three diseases. The prevention and control methods are described below for reference. First, the three insects damage 1, the third generation of the three generation of earthworms generally occur in the middle and late September, is running into the late rice heading period, damage the late rice into a white spike, great harm, we must pay close attention to the eggs hatching medicine. Control methods: 1 per acre with 40% Zhilingling add water 60-75 kg sprayed, or with 40% dimethoate 100 g add water 250-300 kg splash. 2 per acre with 90% trichlorfon 100-150 grams of water 60-75 kg sprayed; or with 50% to kill axillary pine 100 grams plus 250-300 kg of water. When the sensation is serious, spray twice and spray it again every 5-7 days. 2. Leafroll The sixth generation leafroll usually occurs in late September. The leaf larvae are damaged. In particular, the loss of yield after the flag leaf is damaged. Therefore, we must grasp the control effect of larvae before the second and third instars. Control methods: 90% trichlorfon 75 grams per acre, or 50% malathion 150-200 grams, or 40% Zhifu Ling 100-150 grams, add 60-75 kg of water to kill. 3. The rice field at the heading stage of late rice plant in rice planthoppers is prone to damage. Because it occurs at the base of rice, it is generally not easy to find it. Once the rice plant is yellow, it is found to be very serious. Therefore, it must be thoroughly examined and discovered early. Control methods: Use 40% Dimethoate EC 100 grams, or 50% Malathion 75-100 grams, or 90% Trichlorfon 75-100 grams, or 80% Dichlorvos 75-100 grams, add water 75-100 Kilograms of spray. The liquid to be sprayed to the base of the rice stem is only effective. Second, the three diseases 1. Rice blast Rice blast occurs at the heading stage, usually a panicle blast. The panicle blast is seriously damaged. The pathogenic bacteria invade from the panicle neck, causing the whole plant to break off and the spikes turning white. This often leads to serious reduction of production. Control methods: 1 per acre with 50% rice bran net 150 grams; or 40% grams loquat powder emulsion 75 grams; or with 40% diuretics emulsion 150 grams, add water 60-75 kg spray. 2 Diluted with 40 units of kasugamycin, 60-75 kg per mu. For example, adding 1 kilogram of tea bran water per 50 kilograms of diluent is more effective. 2. Bacterial blight Before and after the heading of late rice, bacterial blight often occurs. Severe rice fields are white and loss is serious. Control methods: 1 50 grams per mu with 50 grams of dexamethasone 50 grams, or 10% of leaf dry powder (killing) WP 50 grams, or 10% chlordecone EC 75 grams of water plus 60-75 kilograms of spray, Spray once every 4-5 days, 2-3 times in a row. 2 150 g of Xi Lisheng per mu, plus 3-4 kg of lime powder, spray once every 4-5 days, 2-3 consecutive times. 3 Mix 2-3 pieces of ash with lime powder, spray in the morning when the dew is not dry, apply 10-15 kilograms per acre, spray once every 2-3 days, 3-4 times in a row, against bacterial blight Prevention has a certain effect. 3. Rhizoctonia paddy field water, dense and not ventilated, air humidity, easy to occur sheath blight, the disease generally occurs at the base of rice stems, causing lodging when severe, serious losses. Control methods: 1 per acre with 50% WP wettable powder 75 grams, or 75 grams with 5% aqueous solution, or 10% methyl arsenic wettable powder 125 grams of water and 100-125 kg of spray. 2 For each mu, use 10% Wing Ning (Methyl Arsenate) wettable powder 125g, or 20% Tungsten Green wettable powder 75g, or 70% Dukesong powder 125g, add water 100-125kg spray. 3 Use 10% methyl arsenic arsenic wettable powder or 10% rice nitrogen 0.5 kg per mu, or 20% 150 g wet weight powder of rice foot green, and add dry mud powder 25-50 kg to produce toxic soil applicator. When spraying, keep 4 inches of field water. The medicine must be sprayed on the lower part of the rice plant. The effect is good.