Title: Biological characteristics of tomato powdery mildew Oidium neolycopersici
Abstract: Biological characteristics of Oidium neolycopersici,the main agent causing tomato powdery mildew,were investigated.The test revealed that the conidia germinated at the optimal temperature of 20-25℃ and the optimal relative humidity of 80%-100%,but failed to germinate in water drop.It was also found that the conidial germination had no strict requirement for illumination and pH value.They could germinate at pH3-12 with above 90% germination percentage.The fungus could utilize various carbon sources,and mannitol and galactose are the best of all.Among nitrogen sources,NO3-N (nitrate) is the best,but NH4-N and organic nitrogen could inhibit the conidial germination.The lethal temperature for conidial germination was 44℃ for 10min.
Publication Year: 2012
Publication Date: 2012-01-01
Language: en
Type: article
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