采用地优６４与威优６４按不同比例混栽试验示范结果，１：１混播控瘟效果达５５．８１％～６６．０１％，亩增稻谷１４．６％以上，为最佳混栽配比。混栽控瘟机理测知，混栽区以ＺＣ群小种为主，占６９．７６％；对照单栽区以２８群小种为主占６４．７０％。初步认为混栽对稻瘟病菌的群体致病性有一定干扰和降低作用，从而减轻病害。 The results of mixed demonstration experiments of Di 64 and Weiyou 64 at different proportions showed that the effect of 1: 1 mixed control was 55.81% ~ 66.01%, and the increase of mu was more than 14.6%, which was the best mixed plan ratio. The mixed plague mechanism detection, mixed planting ZC group races dominated, accounting for 69.76%; control single planting area to 28 groups accounted for 64.70% race. It is preliminarily believed that the mixed planting has a certain disturbance and reduction effect on the population pathogenicity of Magnaporthe grisea so as to reduce the disease.