Common Pest Control Techniques in Paddy Rice Field
Before transplanting rice, “tricyclazole†dipping or transplanting with drugs can effectively inhibit the occurrence and spread of rice blast in the field, and it has the advantages of small workload, low dosage, and long prevention time. (a) tricyclazole dip immersed: suitable for paddy field moisture incubation and cultivation of large seedlings transplanted fields. Operation method: Before the transplanting, the roots should be washed clean and placed in a prepared 750 times liquid (with a ratio of 20% tricyclazole wettable powder 100g to water 75kg), and the seedlings shall be soaked for half a minute and then the seedlings Raised the stuffing half an hour after transplanting. (b) Transplanting with pesticides: suitable for transplanting seedlings of dry seedlings and transplanting seedlings for transplanting japonica rice. Operation method: 2 to 3 days before transplanting rice, spray the seedlings with 20% tricyclazole 750 times (prepared with a ratio of 100 g of tricyclazole plus 75 kg of water and 1 mu for spray) to achieve the “transplantation with the drugâ€. "The purpose of preventing rice blast. II. Prevention and cure of seedling dead seedlings in rice dry nursery (1) Causes of dead seedlings: The main causes of die seedling seedlings in rice seedlings were disease, followed by insect pests, lack of water in seedbeds, and burning of high temperature seedlings and fertilizer (medicine). The main diseases are blight and damping-off. The seedlings were infected by Rhizoctonia solani before the 3rd leaf, which caused the seedlings to gradually wilt, die, and darken the roots. The roots of the roots were brown and even softly rotted. Insect pests are mainly underground pests (such as earthworms). (2) Prevention and control measures: 1. Add 50 percent of 3% carbofuran per square meter of seedbed soil before sowing and mix evenly with nutrient soil, prevent underground pests such as earthworms, and use 45% of the enemy sodium sulphonate (dikeshone) 500 times simultaneously. Or 3% Kwong Lingling 800 times watered pouring seedbed, seedbed soil disinfection, prevention of rotten rot and other pathogens caused by rotten species; 2. After emergence and before transplanting, use 3% Guangkuiling 800 times solution or 45% propionate sodium 500 times solution to pour, 5-7 days to prevent rot disease caused by blight and damping-off; 3, seedlings 2 leaves a heart to transplanting before, the seedling leaves yellow, use "thin Shi Mei" seedlings turn green agent 25ml watered 15Kg spray, can improve the seedlings turn green root system developed; 4. Before transplanting the seedlings, use 20% tricyclazole water to spray or dip 750 times to prevent the occurrence of rice blast. (Note: The above formulas 1 and 2 can also be used for growing vegetables and melon crops.) III. Occurrence and Control of Rice Bakanae Disease (1) The law of occurrence: The common name of rice miso disease is "disease-length disease" and "public money". It is a fungal disease that occurs in all rice areas in the country. The disease can be from the seedling stage to the panicle stage, the most vulnerable to disease at the seedling stage, the common symptoms of leggy type. Mainly due to pathogenic bacteria invading rice seedlings produced gibberellin (920) cause rice seedlings grow, inhibit the formation of chlorophyll, the leaves can not carry out photosynthesis and gradually withered. After sowing, when the soil temperature reached 25-30°C, the symptoms began to appear. The diseased seedlings showed whitening (yellowish green), longevity (greater and finer than the healthy seedlings), long and narrow leaves, and poor root development. Some of the diseased seedlings died before transplanting. When the humidity was high, sometimes reddish or white moldy things were produced on the near-ground part. Most of the diseased seedlings could not survive and die after transplanting. The diseased plants had little or no tillering, and internodes were significant. Elongation, bending of the joints, and many fibrous roots on the joints. The pathogenic bacteria mainly overwintered both inside and outside the seeds and on the straw, and the carrier seeds were the primary source of infection for this disease. The incidence of seeds sown with sterile seeds is often higher. The difference in disease resistance between different varieties is very obvious. (B) Control methods: Doing a good job of seed disinfection is a key measure to prevent and cure rice bakanae disease. 1, seed treatment. Formulas are: 20% tricyclazole 750 times or 40% rice bran 1000 times or 30% rice bran 750 times or 10% strong chloroprene 500 times. 2. The diseased plant should be removed immediately after the seedbed is found, so as to avoid the spread of germs. 3. It is recommended to replant other disease-resistant varieties at the time of harvesting, which is common in Putian period. Http:// Security Safe Box,Dual Alarm Safe Box,Security Office Safes,Security Home Safes Hebei Yingbo Safe Boxes Co.,Ltd , https://www.ybsafebox.com