There are many kinds of rice-borne diseases in Jiangsu Province, especially rice seedling disease is more serious in machine-planting rice and dry-breeding (throwing) rice, and the occurrence of dry-point nematode disease is also expanding. Pests and diseases are common in the coastal areas and parts of the river along the Yangtze River, posing a greater threat to rice safety and seedlings. The implementation of rice seed treatment is an important measure for economic, simple and efficient control of seed-borne diseases and pre-existing pests and diseases. It is an effective way to advance prevention and control and promote pesticide reduction and control. All localities should attach great importance to rice seed treatment, pay close attention to propaganda and service guidance, vigorously promote safe and efficient seed drug treatment technology, and strive to improve the coverage of seed drug treatment, laying a good foundation for cultivating rice seedlings.
1 Selected rice seeds, lay the foundation for strong seedlings
It is necessary to select high-quality disease-resistant varieties according to local conditions, select disease-free and robust rice seeds, dry them for 2 to 3 days before the treatment, and carry out air selection, reduce the bacterial source and increase the seed vigor, increase the germination rate and germination. Potential. In recent years, disease-recurring areas such as malignant disease, dry-point nematode disease, rice blast, and bacterial stripe disease have to be compressed to plant high-sensitivity varieties, reduce the risk of disease occurrence, and reduce the pressure of prevention and treatment.
2 Properly carry out pharmaceutical treatment to improve the quality of seed treatment
The first is to choose the right medicine. For the disease, you can choose soaking seeds or dressing with cyanolide, flavononitrile, spermatozoon, acesulfame, acesulfame, acetonide, fluorocycline, and spermatozoa. In most parts of the province, the pathogens have produced high levels of resistance to prochloraz, and the soaking of prochloraz is to be stopped. For dry-point nematode disease, it is possible to soak seeds with chlorpyrifos and its compounding agents; In the mixed area with dry-point nematode disease, it may be selected by soaking or dressing with agents such as acaricide, allicin, and chlorfenapyr. Production can be selected from 25% cymene suspension 2,000 ~ 3,000 times solution, or 17% chlorpyrifos acesulfame wet powder 200 ~ 400 times liquid soaking; or 62.5 g / liter of metal carbaryl 300 ml of suspension seeding agent, add 1,700 ml of water, stir 100 kg of coated rice seeds; or 12 to 50 ml of methyl pyrite-metalaxyl suspension coating agent, dilute with water to 1-2 liters, stir the coated rice 100 kg; or 31.9% imiprazole- tebuconazole suspension seed coating 300-900 ml, diluted with water to 2 to 3 liters, stirred coated rice seeds 100 kg; heavy haystacks, rice locusts occur in heavier areas It can be soaked or mixed with imidacloprid, thiamethoxam, clothianidin and other agents. For example, for rice locust, 30% thiamethoxam suspension seed coating agent can be used in 100-300 ml, and water is added in 1 to 2.5 liters. Kilograms of rice seeds; or rice seeds are first soaked and germinated to white, and then 600 g / liter of imidacloprid suspension seed coating 200 ~ 400 ml diluted and stirred to coat 100 kg of rice; for bacterial stripe disease, bacterial blight and other bacteria Sexually transmitted diseases, demonstration application of trichloroisocyanuric acid, chlorobromoisocyanuric acid soaking or thiazol zinc seed dressing; for rice blast recurrence areas and
The second is to improve the quality of seed treatment. According to the requirements of pesticide labeling, the concentration of the agent treated with quasi-seeds should not be blindly increased or decreased, so as to ensure the control effect; the soaking time of the medicine should be guaranteed for 48 to 60 hours, without scouring after soaking, direct sowing or short bud sowing It is necessary to pay attention to soaking and soaking. When soaking seeds, the liquid should be submerged; when the bag is soaked, the rice seeds are filled with 2/3 bags, ensuring that the seeds are evenly absorbed after the seeds are swallowed, and the seeds are often turned to improve soaking seeds. Effect; avoid the waste liquid reuse when the rice is inoculated in batches to prevent the decrease of the concentration of the drug and the pollution of the bacteria. When coating, thoroughly mix the seeds with the prepared liquid to ensure that the seeds are evenly spread. After drying, germination or drying, and direct sowing; vigorously demonstrate and promote special equipment dressing (coating) to improve seed treatment. quality.
The third is to adjust the temperature during soaking. In the centralized cultivation of plastic trays, it is necessary to appropriately reduce the temperature during the breeding period and reduce the risk of infection of the germs in the long-bud stage; when the germination is carried out in the dry field, the bottom or cover of the straw is prohibited to prevent the straw from being infested; the high temperature germination and the growth of the buds are avoided. Residual liquid can not be poured in the mulberry garden, fish pond and silkworm room, so as to avoid poisoning of fish, birds and silkworms. The seeds soaked in the liquid are not edible or used as feed.
3 Strengthen service guidance and increase coverage
Carrying out seed treatment can not only effectively control seed-borne diseases and pre-stage pests, but also cultivate strong seedlings. It is also one of the important measures to reduce the amount of pesticides and promote green prevention and control. From April to May, it will be the main period for rice breeding. All localities should strengthen the service guidance for seed treatment. In particular, we should pay close attention to the resistance changes of the vaccines to the agents such as prochloraz, and provide a basis for scientific guidance. It is necessary to send prevention and control technology to thousands of households through TV, radio, internet, newspapers and other media and 12316 platforms; to demonstrate seed treatment technology and radiation through demonstration platforms such as rice green prevention and control demonstration zone and agricultural enterprise cooperation demonstration base. Drive large-scale improvement; strengthen training, strengthen tracking services, popularize seed treatment technology “face-to-face†and “hands-onâ€, and strengthen new agricultural management for specialized pest and disease prevention service organizations, family farms, and scale growers. The main body safe medication guidance, improve the coverage of seed treatment, and effectively control the seed-borne diseases and pests at the seedling stage.
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