摘要:
鹤望兰(Strelitzia reginae)炭疽病病原菌经分离培养、接种试验,鉴定其病原菌为炭疽菌属胶孢炭疽菌(Colletotrichumg loeosporioides)。病原菌生长发育的温度在10~35℃,最适温度为25℃。病菌要求较高的湿度,相对湿度90%以上有利于分生孢子萌发。它能有效利用多种碳源,但以葡萄糖、甘露醇为最佳,而甘油、葡萄糖利于产孢;在氮源中,以对磷酸二氢铵、尿素利用为佳,其中磷酸二氢铵最适合病菌产孢,而蛋白胨、硫酸铵不利病菌生长及产孢。室内试验结果表明,50%咪鲜胺,50%多菌灵以及70%甲基硫菌灵500倍、1 000倍、1 500倍液均能有效抑制该病菌的生长。田间试验结果表明,50%咪鲜胺1 000倍液防治效果最好,防效为80.7%,70%甲基硫菌灵1 000倍液防效为71.6%。
Abstract:
The pathogen isolated from anthracnose of Strelizia reginae was identified as Colletotrichum gloeosporioides Penz.The temperature range for Colletotrichum gloeosporioides growth was 10-35℃.The optimum was 25℃.The relative humidity for conidia germination ranged from 90%-100%.The fungus grew better in glucose and mannitol as the carbon sources,and in ammonium phosphate monobasic and urea as the nitrogen sources;glucose and glycerin as carbon sources and ammonium phosphate monobasic as nitrogen sources were suitable for the sporulation of the pathogen.However,peptone and ammonium sulfate as nitrogen source were not beneficial for the growth and sporulation of the pathogen,50% prochloraz manganese WP,50% carbendazim WP,70% thiophanate methyl WP(500 times,1 000 times,1 500 times) could inhibite effectually the growth in Lab.In the field,the results showed that control efficiencies of 50% prochloraz manganese WP 1000 times was the best(80.7%),the control efficiency of 70% thiophanate methyl WP(1000 times) was 71.6%.
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