Bakanae disease is the major species-borne disease on rice, and it is one of the most common diseases in rice production. It has occurred in different degrees in rice production in Wujiang over the past years. With the expansion of the planting area of ​​the Wujiang machine, rice bastard disease has increased year by year, posing a threat to the stable production and high yield of rice in the Wujiang River. Practice has proved that only the comprehensive treatment measures such as seed selection, pesticide soaking, and field management can effectively control the occurrence of rice bakanae disease.
I. Prevention and cure technology of rice bakanae disease
In view of the rising trend of rice bastard disease in Wujiang year by year, the key technologies for prevention and control must be to grasp the key technologies of the four major aspects of pharmacy, soaking, germination and seedbed, and to ensure the safe production of rice.
1, the good soaking agent selection off
The promotion and application of Baike since the late 1990s has played a very good role in curbing bastard disease in rice, but due to the long-term use of a single agent, the resistance of pathogens has increased. Gram resistance has reached moderate. This year, the District Agriculture Commission has selected and tested several kinds of soaking agents in recent years, and combined with the practical effects of various soaking agents in other regions, we recommend 17% citric acid allergen WP as the preferred agent for rice soaking. 17% of chlorpyrifos is compounded by fungicides, insecticides and adjuvants. It has significant control effect on bastard disease and dry tinea worm disease, and has no adverse effect on germination, emergence and seedling growth of rice seeds. Impact, significant increase in production.
2, the good soak concentration and time off
When soaking, it is necessary to operate strictly in accordance with the prescribed dose concentration and soaking time, and it is not allowed to increase or reduce the amount of water arbitrarily. It is not possible to blindly increase the amount of soaking and affect the soaking effect. This year, a large area of ​​17% of acetanilide WP 1 package (15 grams) will be promoted, 4-5 kg ​​of water will be soaked, and 3-4 kg of soaked seeds (about 1 mu of field used) will be soaked for 48 hours before proceeding. Germination at room temperature. The soaking process should be carried out indoors as much as possible, soaking the seeds outdoors and covering the containers to avoid sun and rain and affecting the efficacy. At the same time, when soaking, the liquid must be stirred evenly, and the seed is not allowed to be soaked in the bag. In addition, sowing seeds sunny days before soaking, drying seeds can increase the germination potential and germination rate, improve the uniformity of germination.
3, the good germination method and time
Germination should strictly control the time and temperature of germination. Rice bacillus germs mainly invade buds, roots, root crowns, and wounds. Therefore, the germination time should not be too long. The longer the buds are, the more likely they are to cause wounds. The higher the chance of cross-infection, the heavier the disease will be. The germination time is generally 1-2 days and the seeds can be exposed. Effectively soaking at room temperature, at room temperature thin booths precipitating (general seed stacking thickness does not exceed 30cm), strictly control the temperature. Do not bag, wrap or sprinkle too much water, but also can not be hot water and boring, do not pile in the open air exposure, so as not to overheat, promote disease. It is best not to cover with straw when germinating so as not to infect the straw. At the same time, in the soaking process, we must make proper arrangements according to the weather and labor conditions, so as to avoid prolonging the germination time due to the inability to timely sow.
4, the good sowing and seedbed management
Seedbed selection should be avoided as far as possible to avoid replanting or severe disease fields. To cultivate fine soil, vegetable land or other dryland soils should be promoted. Straw cover beds should be avoided in the breeding process to reduce the chance of infection. The key to the management of seedbeds is to create conditions conducive to the emergence of seedlings, which are not conducive to the occurrence of bastard disease, after sowing and before seedlings. Specific requirements: First, the sampan board must be full of moisture. Sow the water overnight before sowing so that the pods suck enough water to allow them to drain and sow. The second is the plastic plate to wet sowing. When spraying, adjust the amount of water spray to ensure that the bottom soil of the plastic tray is full of water. After wet sowing, a water layer should be established. After sowing, a shallow water layer should be set up in the field. The water layer must not have a sampan plate, but it must not be flooded to ensure that the bottom of the plastic plate is immersed in water, especially in fine weather. This has the effect of guaranteeing seedling emergence and preventing seedbed temperature from being too high, thus reducing disease occurrence. Important role. After emergence, normal management resumes.
Second, the matters needing attention
1,17% of the bacillus garlic allicin seed treatment agent contains schwandan, sensitive to the silkworm, soaking species to stay away from the silkworm room to prevent poisoning.
2, after soaking can not be germinated on the sowing, on the one hand affect the emergence of seedlings, on the other hand to affect the use of herbicides (Shao Tian herbicide rather than sowing germination seeding use, unsafe).
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Vitamin K2 MK-7, Vitamin C, Vitamin E, Vitamin K2, Vitamin H, Vitamin D3
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