葉面水濕持續(xù)時(shí)間對烤煙棒孢霉葉斑病的影響
Effect of Dew Period on Leaf Surface on the Leaf Spot Disease of Flue-cured Tobacco Caused by Corynespora Cassiicola
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摘要: 烤煙接種棒孢霉葉斑病菌后保濕12 h或每d保濕12 h，病情發(fā)生都較輕微,；保濕24～36 h,，病情發(fā)生較明顯至較嚴(yán)重；保濕48～72 h,，病情發(fā)生較嚴(yán)重至嚴(yán)重,。預(yù)先保濕后再接種，然后再保濕12 h,，病情加重,。筆者認(rèn)為連續(xù)雨天、葉面水濕持續(xù)24 h以上是病害明顯或嚴(yán)重發(fā)生的必要條件之一,。Abstract: When inoculated plants were placed in a moist chamber for 12 hours only or 12 hours every night, the disease occurred slightly. When inoculated plants were placed in a moist chamber for 24~36 hours, the disease occurred obviously, and for 48~72 hours occur severely. We proposed that the continuous raining and > 24 hours dew period on surface were two prerequisites for the disease obvious or servere occurance.
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