【摘要】 利用K326、云烟85、翠碧1号和红花大金元等不同抗性的烤烟品种,观察青枯病的流行趋势,并测定20cm土温。当20cm土温稳定通过20℃后5～10d高感品种红花大金元即出现轻微症状,在此之后10d左右,低抗品种K326亦出现凋萎症状。若利用此规律,对青枯病进行预测预报,当红花大金元出现轻微症状之时,就是田间青枯病的最早防治时期。更多还原

【Abstract】 Different resistant level varieties K326,Yunyan85,Cuibi-1and Honghuadajinyuan were used to monitor the epidemic dynamic of tobacco bacterial wilt,meanwhile monitoring the temperature of20cm soil.After5～10d the temperature≥20℃,high-susceptive cultivar Honghuadajinyuan had light symptom,in10days low-resistive cultivar K326also had light symptom.Utilizing the rule for forecasting the disease,the earliest time for prevention and control of bacterial wilt in fields is when Honghuadajinyuan had light symptom.更多还原