摘要
香蕉弯孢霉叶斑病菌[Curvularia lunata（Wakker）Boed]适合生长的培养基有PSA、PDA和OMA；菌落生长、产孢和孢子萌发最适宜的温度为25～30℃，pH要求不严格为5～9；在碳源和氮源中，蔗糖、葡萄糖、尿素、磷酸氢二氨和硝酸钠有利于病菌生长和产孢；分生孢子萌发对湿度有严格的要求，RH≥80％以上分生孢子萌发，随湿度增加萌发率增高；光照对菌丝体无显著影响，光暗交替有利于孢子的形成；孢子致死温度为55℃（10min）。药物敏感性测定结果表明，6％戊唑醇微乳剂、25％丙环唑乳油、25％咪鲜胺水乳剂、25％戊唑醇乳油和25％苯醚甲环唑乳油对香蕉弯孢霉叶斑病菌菌丝生长均有较好的抑制效果，其中25％咪鲜胺水乳剂和25％苯醚甲环唑乳油的抑菌效果最好。
The biological characteristics of Curvularia lunata （Wakker） Boed. were preliminarily studied. The optimal media for growth of the pathogen were PSA, PDA and OMA. The optimal temperature and pH ranges for mycelial growth, sporulation and conidial germination of the pathogen were 25-30 ℃ and 5-9, respectively. Sucrose, glucose, carbamide and sodium nitrate, among other carbon and nitrogen resources tested, were beneficial for mycelial growth and sporulation. A strict RH （81%- 98 % ） was required for conidial germination, and 100% germination rate was achieved in water. The effect of light on growth of the pathogen was not obvious. The lethal temperature for the conidia was 55 ℃ （10 min）. The effects of 5 fungicides on mycelial growth of C. lunata were determined in the laboratory. The results showed that several fungicides including tebuconazole, propiconazol, prochloraz and difenoconazole could inhibit mycelial growth, although pro- chloraz and difenoconazole were better.
出处
《植物保护》
CAS
CSCD
北大核心
2008年第2期71-75,共5页
Plant Protection
