Volume 47 Number 1 Article 8 Pages: 47-51
Year 1993 Month 1
Title: Scab Occurrence on Pecan Clones in Alabama in a Year of High Disease Incidence
Authors: W.D. Goff, L. Campbell, T.E. Thompson, J.S. Bannon and A.J. Latham
Citation
Abstract:
Occurrence of scab, a fungus disease of pecan
(Carya illinoensis (Wangenh.) K. Koch) caused
by Cladosporium caryigenum (Ell. et Lang.)
Gottwald [= Fusicladium effusum Wint.) was
rated on 63 pecan clones at five locations in
Alabama during a year of high disease inci
dence.
Locally-selected clones of seedling origin,
'Deakle's Special,' 'Dixie,' and 'Gafford,' were
entirely free of scab symptoms on both nuts
and leaves of unsprayed trees.
Advanced US DA
selections 70-3-34 and 72-2-9 had very low scab
incidence.
Seven other USDA selections, 75-5-
32, 78-15-51, 72-6-36, 76-7-41, 73-1-10, 72-10-51,
and 70-4-9 had significantly worse scab than did
the standard cultivar 'Desirable.'
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