Rice blast is a major disease in rice production. Rice blast pathogens use hyphae to hide on diseased rice straw and seeds for wintering. Diseased straw encounters suitable conditions of temperature and humidity, and continuation of conidia occurs through wind, rain and water. Spread and infect rice plants and can be re-infected repeatedly. Therefore, it is necessary to seize the early warning and comprehensive prevention and treatment. Winter has a good effect in controlling rice blast. Bacterial sources of rice blast are mainly wintered on diseased grasses, diseased valleys, and diseased grains. If the source of sterilization is not eliminated in winter, the hazards of rice blast in the second year will be aggravated. The technical points of winter defense: First, to deal with sick valley, must not leave the valley as a seed, it must be as soon as possible to clean the valley completely as soon as possible. 2. Burn off early and burn the diseased husks and pods as soon as possible, and burn them at the latest before the beginning of the spring to prevent the temperature from rising. Third, the management of straw, especially for diseased straw, can not be used indiscriminately, can not use sick straw to build houses, can not use straw padding livestock and poultry enclosures, but can not use diseased straw for nursery cover, so as not to contagious wind propagation . 4. If the straw is closed for storage and the diseased straw is used as fuel, it should be piled on a sheltered area away from the farmland. It is best to confine it in an airtight manner and burn it once before the winter season or during the childbirth. Fifth, full maturity, sick straw as compost, to fully decomposed, stacking fermentation temperature is maintained at about 52-56 °C, so that rice blast disease after 8-10 days, it will die.
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