The Occurrence and Seed Transmission of Bean Anthracnose Caused by Colletotrichum Lindemuthianum in Jordan
2003
Qandah, I.S. | Al-Momany, A. (Jordan Univ., Amman (Jordan) Faculty of Agriculture)
The study was conducted in 2001 to investigate the occurrence and seed transmission of bean anthracnose disease in Jordan. The study included 74 bean fields with bean cultivars 'Lolita', Italian and 'Bronco', for determination of disease incidence percentages and transmission of the disease. bean anthracnose caused by Colletotrichum lindemuthianum was found in about 90% of the total surveyed fields. The disease was wide spread in the different bean growing areas of Jordan, including the Jordan Valley, Wadi-Shu'ayb and Al-Baqa regions, in both open fields and greenhouses. Maximum disease incidence (25-50%) occurred in Wadi-Shu'ayb region during April, and the lowest (0-5%) in North Jordan Valley during February. The pathogen overwinters in infected seeds, which could be considered as the most important source of inoculum for the primary infection. Germination percentage decreased with an increase in seed infection which caused seed rot and seedling mortality. The fungus was isolated from cotyledon, stem and hypocotyl of diseased seedlings. A transmission study showed that the infected seeds serve as primary source of inoculum for disease spread.
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