广西杧果象牙品种果腐病病原菌种类鉴定

Identification of Pathogen Species in the Fruit Rot of Mango Ivory Cultivar in Guangxi Province

广西杧果象牙品种发生的果腐病,经病原鉴定,其种类为杧果炭疽菌(Colletotrichum gloeosporioides(Penz.)Sacc.)和杧果大茎点菌(Macrophoma mangiferae Hingoroai et Sharma)。这2种菌均可侵染杧果引起果腐病,其病状虽有相似性,但病症有明显差异。杧果炭疽菌果腐病病斑上生轮纹状小黑点,其顶端有黄褐色颗粒状物;杧果大茎点菌果腐病病斑生小黑点,小而密,其上无颗粒状物。

The pathogens isolated from the infected mango flesh of Ivory cultivar in Guangxi province,were identified as Colletotrichum gloeosporioides（Penz.） Sacc.and Macrophoma mangiferae Hingoroai et Sharma.The fruit rot of Ivory mango caused commonly by Colletotrichum gloeosporioides and Macrophoma mangiferae,the symptoms between two pathogens showed similarity,however,symptoms of pathogens marked distinction.Disease spots of the mango fruit rot（Colletotrichum gloeosporioides） had ring liked black points and protruding ochre particles;disease spots of the mango fruit rot（Macrophoma mangiferae） had densely scattered small black dots and with no protruding particles.