- 期刊
- OpenAccess
檬果套袋後檬果炭疽病病原菌感染機會之研究
Study on Infection Opportunity of Colletotrichum gloeosporioides after Mango Bagging
摘要
檬果炭疽病主要由Colletotrichum gloeosporioides引起，為影響檬果品質與櫥架壽命最大之病害。罹病果實果皮上有黑色圓形之凹陷病斑，後迅速擴大侵入果肉，病斑連成一片，使果實腐敗。高溼環境下，於黑色大型病斑上會出現橘紅色小點為分生孢子，是本菌最重要之感染源。目前防治炭疽病最好的方式為早期套袋。本研究利用培養基、嫩葉、果實做接種測試，發現檬果炭疽病菌可以穿透供試不同品牌的紙套袋在培養基上生長，並可感染套袋保護的葉片及果實。檬果套袋後若遭逢大雨，造成紙袋長時間緊貼於檬果表面，此時若有炭疽病菌分生孢子藉風雨傳播於於紙袋上，就有機會穿透紙袋感染果實。惟此種條件及感染機率在田間實際條件下並不高，農民需注意套袋時將果實套於紙袋中央並綁緊袋口，勿使紙袋有機會緊貼果實，園中若有炭疽病的罹病組織應清除乾淨，可避免大雨之際的感染機會。
關鍵字
檬果炭疽病並列摘要
Mango anthracnose caused mainly by Colletotrichum gloeosporioides, it's the greatest impact of the mango quality and shelf life of the cabinet. The depression diseased black round spots on the fruit peel, rapid expansion of invasive lesion in one piece, so that the fruits of corruption. High humidity environment, spores appear as orange dots on large black spots, is the most important source of infection. Currently the best approach to control mange anthracnose is early bagging. In this study, inoculation test on culture medium, leaves, fruits do found that mango anthracnose can penetrate tested different brands of paper bagging and grown on culture medium and also infect leaves and fruits by bagging protection. If heavy rain after mango bagging, resulting in paper bag close to the mango surface for a long time, at this time if anthracnose spores spread by wind and rain on the bag, may have a chance to penetrate the fruit bag infection. But such conditions and actual risk of infection in field conditions are not high. Farmers have to pay attention when bagging the fruit set in a paper bag and tied the bag central, not allow paper bags have a chance against the fruit, the anthracnose diseased tissue should be cleaned from orchard to avoid the chances of infection on the occasion of the rain.