摘要
对辽宁省保护地发生的黄瓜褐斑病进行病原菌的分离、鉴定 ,明确该病的病原菌为多主棒孢霉[Corynesporacassiicola(B.&C.)Wei]。生物学特性研究表明 ,该菌孢子萌发的最适温度范围为15～35℃ ,最适pH值为5～8,水滴是孢子萌发的必要条件。病菌营养生长的最适温度为15～35℃ ,最适 pH值为6～8 ,在PSA、PDA等常规培养基上生长良好 ,光照对菌丝生长速度影响不显著。病菌产孢的最适温度为25～30℃,最适pH值为5～8,光照有助于孢子形成,在PSA、PDA等常规培养基上能大量产孢。病菌分生孢子在室外难以安全越冬,在保护地内能够安全越夏。该菌寄主范围广。
Caused by Corynespora cassiicola(B.&C.)Wei,Cucumber Target Leaf Spot is a serious disease in green house in Liaoning Province. The research results on biological characteristics showed: the optimum temperature for conidial germination is15～35℃,the optimum pH is pH5～8, water drop is necessary for conidial germination,the optimum temperature for hyphal growth is 15～35℃,the optimum pH is pH6～8.Hypha can grow well on PSA?PDA medium and light has no effect on its growth. The optimum temperature for sporulation is 25～30℃,the optimum pH is pH5～8.The fungi can sporulate a lot on PSA?PDA medium and light is in favor of sporulation.Under outside room condition, the conidium can't live through winter safely, but can live through summer safely in green house.The pathogen has a wide range of parasitifer,can infect more than 20 species of vegetable such as cucumber and tomato.
出处
《沈阳农业大学学报》
CAS
CSCD
2002年第4期258-261,共4页
Journal of Shenyang Agricultural University
