Vol. 4 No: 4

Title:
The Blue Stripe Wilt of the Raspberry

Author:
R.V. HARRIS

pp: 221-229

Abstract:
Introduction
A disease of the cultivated Raspberry (Rubus Idæus L.), hitherto unrecorded for this country, was brought to the notice of the present writer in the winter of 1923–24. All the varieties (collected from various sources) grown in the trial plots at the East Malling Research Station showed at least a trace of the disease, while some varieties were affected to such a degree that the results of the trials were being seriously impaired and an investigation of the disease was imperative.

The wood and pith of diseased canes collected during the winter were found to be infested with delicate fungal hyphæ and particles of the wood and pith transferred to agar plates yielded with marked purity and regularity cultures of a fungus which was identified as a species of Verticillium. Later (in spring and early summer) other organisms were isolated from diseased fruiting canes, but no one organism appeared with the constancy shown by this species of Verticillium which was isolated from many . . .

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