Method of predicting and forecasting rice viral diseases caused by grey plant hopper
A technology for striatellus planthopper and virus disease, applied in the field of prediction and forecasting of rice virus disease, can solve the problems of indiscriminate use of pesticides, futile use, environmental pollution, etc., and achieve the effects of protecting the environment, reducing economic losses, and reducing the amount of pesticides used
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[0020] Example 1
[0021] A method for predicting rice virus disease caused by Laodelphax striatellus includes the following steps:
[0022] S1: In mid-to-late January, select several wheat fields for rice and wheat rotation. The wheat fields are wheat fields where rice and wheat are rotated for more than 3 years, and the number of wheat fields is 5. The wheat is sowed with no-tillage. Before the rice is harvested, The wheat is sown in the field. When the rice is harvested, the wheat has grown to 5-8cm. Five sampling points are selected for each wheat field. Digging sampling method, the size of the digging sampling square is 25cm long x 25cm wide x 20cm deep, and the wheat seedlings are taken out Put them in a plastic bag and tie them together with the rice stakes, place them at 25°C for 24 hours, untie the plastic bags, count the number of Laodelphax striatellus at all sampling points, and divide the total number of Laodelphax striatellus by the total area of the sampling points...
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