不同杂交稻组合混栽控瘟试验

Study of Multiling Cultivars with Hyb rid Rice in Different Match to Control Rice Blast

本文报导１９９２年采用地优６４与成优６４按不同比例混栽控瘟试验，结果以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。并对混栽控瘟机理作初步的探讨，测知混栽区以ＺＣ群小种为主占６４．７％，初步认为混栽区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。

In the paper ,the continuative study of multilihg cultivar with Di-yon and We-you 64 in different match ,and the result of multiling cultivar demon nstration in the field were reported. The eptimum match was 1:1,with thathe effect of multiling cultivar to control rice blast、was 55.81% to 66.01%,and the yield increseased more than 14.6% per Mu.The mechanism of multing cultivar to control rice blast Was inquired primarily .The results showedthat in multiling area chief physiological race、as ZC group,it held 69.76%,incontrast single cultivar area chief physiological race was ZB group it held 64.70%.That there were specified and cedrease to colony pathogenicity ofrice blast with multing cultivar was concidered primarily. (Received August 8.1994)