Prevalence Category Of Rice Blast In Main Rice Producing Areas Of Heilongjiang Reclamation Area And Study Of Forecast Model

The effect of spore hyphal growth,sporulation,germination and pathogens infection about 7 regions of the strains of rice Blast were studied throug the Analysis of temperature, humidity and light. The experimental results indicate that Light and temperature on the growth and Sporulation relative humidity on spore germination is very important,temperature and relative humidity on Pathogens infection and incidence is very important.The result provide a theoretical basis of screening meteorological factors indicators of disease severity divisions.The incidence of rice blast was classified in the main 33 Rice cultivation regional of Heilongjiang Province used multivariate statistical system in the clustering method and fuzzy mathematics of fuzzy clustering,then usingcorrelation analysis through selecting two humidity indicators late June and late August from the meteorological conditions on the impact of rice blast.The experimental results indicate that33 of this region can be divided into three categories. The results showed that it is important guiding significance about prevention rice Blast.12 historical data of rice blast leaf blast was selected. the average temperature in early July, maximum temperature in early July and precipitation in early June and late JuneWere seen to forecast indicators through correlation analysis, A partial and biased towards a light were classified through fisher, bayes discriminant analysis. the survey data will be divided into severe, moderate and mild pandemic and accurate forecasts were done. the model was pakaged in finaly.