Method of predicting and forecasting rice viral diseases caused by grey plant hopper

Abstract

The invention discloses a method of forecasting rice viral diseases caused by grey plant hopper, and belongs to the technical field of insect prediction and forecast. The method comprises the following steps: step one, picking multiple wheat fields, where paddy rice and wheat are planted in turns, and calculating the overwinter cardinal number by an earth excavation sampling method; step two, picking multiple sampling locations on wheat fields picked in the step one, capturing the grey plant hoppers, and calculating the density of grey plant hoppers; step three, adopting a dot enzyme-linked immune-sorbent assay (ELISA) method to detect the viruses of captured grey plant hoppers, and calculating the virus carried rate; step four, calculating the amount of grey plant hoppers with effective viruses; and step five, predicting the happening rate of rice viral diseases, based on the overwinter cardinal number of grey plant hopper and the amount of grey plant hoppers with effective viruses. Based on the monitoring on grey plant hopper, the diseases caused by grey plant hopper (rice black-streaked dwarf disease and rice stripe disease) can be predicted; the rice viral diseases can be forecasted and predicted; the rice viral diseases can be controlled scientifically, the economic loss caused by rice viral diseases is reduced, the using amount of pesticide is reduced, and the environmentis protected.

Description

technical field [0001] The invention relates to the technical field of pest prediction and forecasting, in particular to a method for predicting and forecasting rice virus diseases caused by striatellus striatellus. Background technique [0002] The gray planthopper belongs to the Hemiptera planthopper family insects, with a wide distribution area, from Hainan Island in the south, to Heilongjiang in the north, from Taiwan Province and the eastern coastal areas in the east, to Xinjiang in the west, and it occurs in the middle and lower reaches of the Yangtze River and North China. For the heavy. The host plants of SBPH include rice, wheat, corn, barnyardgrass, Qianjinzi, crabgrass, maize, and grass and other gramineous plants. The main damage of SBPH is that adults and nymphs suck rice sap, and in severe cases, the host plant can be pulped dry, showing the appearance of "burning lice". What is more serious than directly sucking the sap is that SBPH also transmits various vi...

AI Technical Summary

Problems solved by technology

The prevention and control of rice viral diseases in production mainly depends on the prevention and control of SBPH at the seedling stage, that is, the approach of "insect control and disease prevention". The phenomenon is common, causing environmental pollution and unnecessary waste; what's more, after the seedlings are transplanted to the field and the disease occurs, some begin to spray pesticides for prevention and treatment.

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