Proceedings of the fifteenth annual meeting of the Arizona Society for Electron Microscopy and Microbeam Analysis, held in Tucson, Arizona, March 24 and 25, 1994

• Publisher: John Wiley and Sons
• Year: 1994
• Tongue: English
• Weight: 472 KB
• Volume: 29
• Category: Article
• ISSN: 1059-910X
• DOI: 10.1002/jemt.1070290313

✦ Synopsis

85364'. Decav and decline of lemon trees in Arizona. The brown rotting fungus genus Conwphom on lemon is in the family

Coniophoraceae. This is the f i i t time a Coniophom species causing declioe of lemon has been reported and the f i t known incidence of decay of fruit trees due to a Coniophom. Scanning electron microscopy in decayed blocks of lemon wood shows obvious degradation of secondary walk, pit enlargement, cracking and shrinkage, and presence of mycelial fragments. Growth of the fungus occurs between 15C through 40C with optimum growth at 30C-35C.

All isolates obtained to date are incompatible in vegetative incompatibility tests with the exception of two isolates. In vitro decay blocks measure between 7-20% weight loss over 20 weeks at optimum temperatures. Fungicide and wound dressing tests showed that only the wound dressing treatment resulted in significant inhibition to the fungus in 15 weeks.