Volume 48 Number 1 Article 24 Pages: 50-50
Year 1994 Month 1
Title: Evaluation of Certain Scab-Immune Apple Cultivars
Authors: Drs.R.L. Stebbins, A.A. Duncan and O.C. Compton
Citation
Abstract:
We planted four trees of the follow
ing apple cultivars in 1985: 'Redfree,'
'Chehalis,' 'Prima,' 'Priscilla,' 'Nova
Easygro,' 'Sir Prize,' 'Jonafree,' 'McShay,'
'Liberty,' 'Freedom,' and 'MacFree.'
The trees were grown without fungi
cide sprays.
High levels of infestation
by powdery mildew-were observed
on 'MacFree,' moderate levels on 'Redfree,'
'Liberty' and 'Freedom,' and low
levels on the others.
A few fruits of
'Chehalis' did show some scab.
Fruits of 'Freedom' in two of four seasons
showed small black spots which might
have been caused by Venturia inaequalis
(scab) or from some other cause.
Large taste panels rated the stored
fruits in four seasons.
Mean ratings
for 'Liberty,' 'Jonafree,' and 'Fiorina'
were sometimes as high as for the
popular new scab susceptible cultivar
'Empire.' Generally they were not rated
as highly as 'Braeburn,' 'Fuji,'
gold,' or 'Gala.'
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