Articles

MACROSCOPIC AND MICROSCOPIC STUDIES OF SOME APPLE CULTIVARS INOCULATED WITH SEVERAL RACES OF VENTURIA INAEQUALIS

Article number
538_41
Pages
239 – 242
Language
Abstract
Three races and a French inoculum of Venturia inaequalis were inoculated on ‘Gala’ (susceptible control cultivar), Malus floribunda 821 (Vf resistant clone), and two local cultivars: ‘TN 10-8’ and ‘Président Roulin’ (partial resistance). The macroscopic and microscopic symptoms of the two cultivars carrying partial resistance were compared to susceptible and Vf controls.
Resistance symptoms observed in partial resistant cultivars are characterised by a more extended chlorotic lesions; sporulating lesions are smaller and appear later than on susceptible control and conidiogenesis is reduced.
The scanning electron microscopy shows important modifications in the growth and the conidiogenesis of fungus according to the scab races and cultivars inoculated.

Publication
Authors
M. Chevalier, F. Laurens, R. Filmond
Keywords
scab resistance symptoms, scanning electron microscopy, partial resistance, susceptibility, conidiogenesis
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