Volume 35 Number 4 Article 6 Pages: 137-140
Year 1981 Month 10
Title: Criteria For Determining Peach Variety Susceptibility to Cytospora Canker
Author: N. S. Luepschen
In evaluating some Harrow peach
selections in the field for Cytospora
(Valsa) canker resistance/susceptibility, natural infections were evaluated
by 2 rating systems based on canker
incidence over a 10-year period and
on final tree condition, while cankers
initiated by artificial inoculations were
measured by linear extension and total
None of the selections exhibited
any Cytospora resistance under Colorado conditions.
inoculations and natural incidence
were not significant.
Caution is advised for relying solely on artifically
Inoculation techniques are discussed.
is needed to incorporate genetic resistance to Cytospora canker into new
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