【摘要】 文中对玉米大斑病流行过程中的3个环节——孢子萌发侵入、潜育显症和病斑扩展进行了定量研究。提出了孢子侵入概率与露时、露温关系,逐日累积显症率与显症日数关系,潜育期与玉米生育期关系等4个回归预测式;还研究了气温、降雨对潜育显症,气温、光照对病斑扩展的影响。更多还原

【Abstract】 Spores germination and penetration, incubation and symptomatic appearance, lesion expansion, which are three key links of the epidemic process of maize northern leaf blight, are studied in quantity. Four regression equations which describe the relationship between sporespenetration probability and dew period as well as dew temperature; probability of symptomatic appeance and day of symptomatic appearance; incubation period and growth phase of corn, are constructed. The effect of air temperature and rain on incubation and symptomatic appearnce, and the effect of air temperature and illumination on lesion expansion are studied.更多还原