Volume 46 Number 1 Article 3
Year 1992 Month 1
Title: Field Susceptibility of 68 Apple Cultivars to Cedar Apple Rust, Quince Rust and Hawthorn Rust
Author: J. Warner
Abstract:
Apple cultivars were evaluated in a field for
susceptibility to cedar apple rust (CAR), quince
rust (QR) and hawthorn rust (HR). HR lesions
on apple leaves were relatively small and few in
number compared to CAR lesions.
Between
1986 and 1990, percentage fruit infection varied
from 0 to 64 for CAR and from 0 to 42 for QR.
'Mutsu' was the most susceptible culitvar to
both CAR and QR. Other cultivars highly susceptible to both CAR and QR included 'Burgundy,' 'Gloster 69,' 'Smoothee Golden Delicious,'
'Julyred' and 'Summerred.' Susceptibility of the
cultivars to rust infection varied from year to
year with 1986 having the highest level of
infection.
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