【摘要】 根据川南和渝南主栽品种抗瘟性变化历史资料,分析了1992年和1998年稻瘟病菌不同致病种群变化与品种组成关系.首次提出了利用菌株回接毒力频率与其平均毒力频率差数相比较,确定品种感病化程度,作为调整品种群体结构的科学依据,以达到宏观控制稻瘟病的目的.更多还原

【Abstract】 The paper analyzes the difference of the pathogenic varieties and the relationship of the variety composition,allording to the historic material to the varieties of the main hybid fece varieties in Southeast Sichuan during 1992 to 1998.It’s the first time to advance to use the camparison on rate of pathogenic isolates between norm and refrieving to define the susceptible extent of the varity.It’s an scientific base to adjust the structures of the vartieties,to reach the objective of the macroscopic regulating to rice blast.更多还原