Volume 48 Number 2 Article 6
Year 1994 Month 4
Title: Susceptibility of 15 Apple Cultivars to Apple Scab, Powdery Mildew, Canker and Mites
Authors: H.L. Pedersen, J.V. Christensen and P. Hansen
Abstract:
Field resistance of 15 apple cultivars to diseases and pests was evaluated by not treating
with pesticides during the observation period.
The level of apple scab, powdery mildew,
canker and fruit tree spider mites was assessed.
The cultivars 'Discovery,' 'Filippa,' and 'Bramjeys
Seedling' showed low susceptibility to scab.
'Mutsu,' 'Summerred,' 'Gravenstein' and in some
cases 'Cox's Orange,' 'Guldborg' and 'Red
Ananas' were very susceptible to scab. 'Belle de
Boskoop,' 'Bramleys Seedling! 'Discovery,' 'Filip-
Ea,' Ingrid Marie' and 'Mutsu' had low susceptibility
to powdery mildew, whereas 'Ildrod
Pigeon' was sensitive to powdery mildew. 'Belle
de Boskoop,' 'Bramleys Seedling,' 'Filippa' and
'Red Ananas' were not sensitive to canker. 'Discovery' and 'Transparente Blanche' were most
susceptible to canker. 'Belle de Boskoop,' 'Cox's
Orange,' 'Gravenstein,' 'Mutsu' and 'Skovfoged'
had low susceptibility to spider mites. 'Red
Ananas,' 'Filippa,' 'Discovery,' 'Guldborg' and
'Ildrod Pigeon were attacked by spider mites.
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