In southern China, rice often has black streaked dwarf disease. Many farmers call it "dwarf grass". In recent years, dwarf grass is the latest viral disease, which has a strong burst, spread and spread. The speed is very fast, and the damage to rice is also very large and difficult to control. For many years, in order to ensure the safety of food production, pesticide control should be carried out in time. We can take the following measures to prevent and control the disease.
First, choose a good quality variety. According to the local conditions, the varieties that have been generally mild in the past few years have been selected.
Second, more cultivation and choice for Putian. From April 25th to May 10th of each year, the time during which the 7-leaf pre-infected disease-sensitive period and the poisonous planthoppers move or peak occurs are staggered. In the past few years, we have selected farmland with relatively mild disease, good soil fertility and simple irrigation and drainage to make fields, and need to remove the surrounding weeds in time, destroy the environment in which the planthoppers live and reproduce, and reduce the number of poisonous planthoppers.
Third, use the agent to soak the seeds. The concentration of soaking seeds is 10% of imidacloprid 300-500 times or the higher insecticide imidacloprid is diluted according to the corresponding concentration and soaked seeds for about 6 hours to 12 hours, then washed with water, and finally Seed soaking and germination are carried out according to a conventional method.
Fourth, in the seedling stage of crops to prevent shortness. It is necessary to observe the situation of the rice planthopper in the field and cure it at an appropriate time. When the seed is stirred by the above-mentioned agent and the seed is soaked, it is necessary to apply a “gifting agent†after transplanting the seedling; if there is no seed dressing or soaking the seed, it is necessary to apply the pesticide 2 to 3 times, that is, when the seedling is in the heart of the seedling One time, the second medicine is sprayed every 7 to 10 days, and the third medicine is sprayed from 3 days to 5 days after the transplanting. The weeds around the field must also be sprayed together. Tips for the pesticide network : Pay attention to the need to check the field in time after the rain, observe the amount of the white backed fly, if the amount is not called, you need to go to the treatment immediately.
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