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It was reported home and abroad that, the harm of rice blast can be controlled by mix-culture of various varieties.Mao Jianhui (1991) reported the rate of leaf blast decreased 74.23 % and the disease index decreased 85.30% while mix-cultulre method was carried out.The sogatells furcifera (Horvath) determination L8 (4 × 28) was used for the study on controlling rice blast by using mix-culture of different combinations ofhybtid rice Di-you 64 (R) with Wei-you 64 (S).The results showed that the panicle blast indexes decreased 46.32%～47.17 %.In the field demonstration, the leaf and penicle blast-controlling effects were 33.32 %and 37.66 % respectively, the yield increased 13.98%.
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