Volume 51 Number 1 Article 5
Year 1997 Month 1
Title: Incidence of Xylella fastidiosa Wells et al. on Plum and Peach in Alabama
Authors: G.E. Boyhan, B. Tangsukkasemsan, J.D. Norton and D.G. Himelrick
Abstract:
Alabama cooperative extension personnel in 22 of the 67 counties responded to a request for
peach and plum twig/leaf samples to be tested for X. fastidiosa, the causal organism of phony
peach and plum leaf scald.
Enzyme-linked immunosorbant assay results indicated that 14% of
peach and 12%, of plum samples were positive.
The highest incidence of the pathogen was in
Mobile County with 44% of the samples testing positive.
Additionally, two plum variety trials were
sampled at Shorter in Macon County and Thorsoy in Chilton County.
All or the cultivars at Shorter
and 37.5% of the cultivars at Thorsby had assay results significantly higher than uninfected
seedlings.
Trees in the Shorter and Thorsby trials were also rated visually, with 'AU-Producer'
having the lowest average rating of 0.4 on a 0-5 scale.
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