烟草赤星病流行过程重要环节的定量研究

Quantitative Studies on Key Links of Epidemic Process of Brown Spot of Tobacco

对烟草赤星病流行过程中的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温、露时的关系，逐日累积显症率与显症日数关系，病斑面积与病斑日龄关系4个回归预测式，为建立电算预测模型提供了定量依据。

3 key links of epidemic process of brown spot of tobacco-spore germinaion and penetration, incubation and symtomatic appearance, lesion expansion were studied in quantity. 4 regression equations of the relation between spore pentration probability and dew temperature, between spore penetration proboility and dew period, between probability of symptomatic appearance and days of symptometic appearance, tetween lesion area and lesion age were built.