温湿度对黄瓜霜霉病菌孢子囊存活的影响  

Effect of Temperature and Moisture to Sporangium Survival of Cucumber Downy Mildew

作　　者：国淑梅[1] 牛贞福[1] 

机构地区：[1]山东省农业管理干部学院,山东济南250100

出　　处：《北方园艺》2012年第23期142-144,共3页Northern Horticulture

摘　　要：以"鲁黄瓜3号"黄瓜为试材,研究了温湿度对其霜霉病菌孢子囊存活的影响。结果表明:温湿度对孢子囊的存活有显著的影响,随温度的升高孢子囊的存活率降低,恒温条件下10、15、20和25℃存活期为3～6d;30℃为3d;35℃时新鲜孢子囊存活期为1d。饱和相对湿度条件下的孢子囊存活率最高,并且与相对湿度75%和45%时孢子囊存活率存在明显差异。Taking ＇Luhuanggua No. 3＇ cucumber as test materials, the effect of temperature and moisture on survival of sporangia was studied in controlled conditions. The results showed that temperature and humidity had Significant difference on survival of sporangia. The survival ratio deceased with the increase of temperature. Only 2% sporangia were survived after 24 hours treatment at 35℃. Saturated humidity was favor of the survival of sporangia and the effect of dry condition on the survival of sporangia was complicated. At dry condition （RH-45%）, the survival ratio increased with the increase of temperature, and reached the peak at 25℃ then decreased with increase of temperature. Kept in environment with constant temperature,life-span of fresh sporangia was 1 d at 35℃ ,3 dat 30℃and 3-6 d at 10,15,20 and 25℃,respectively.

关 键 词：黄瓜霜霉菌 孢子囊存活率 温湿度 

分 类 号：S436.421.11[农业科学—农业昆虫与害虫防治]