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Conditions for the experimental transmission of cabbage black ringspot virus by Myzus persicae (Sulz.) to turnip (Brassica rapa)

Published online by Cambridge University Press:  10 July 2009

I. W. Selman
Affiliation:
Wye College (University of London),nr. Ashford, Kent

Extract

Experiments in a glasshouse have shown that the most favourable conditions for transmission of cabbage black ringspot virus by Myzus persicae (Sulz.) to turnip plants with two foliage leaves were as follows: an acquisition access period of five minutes; a test-feeding period of not less than two hours; the use of nine viruliferous aphids per test plant; the use of aphids from uncrowded colonies; the use of the third leaf from the base of an infected turnip (5-leaf stage) as virus source; and inoculation of the younget leaf of a test plant. Darkening plants for 24 or 48 h did not increase susceptibility to aphid inoculation, but increased it to mechanical inoculation in the summer. When the youngest leaf was inoculated, the age of the test plants (10-25 days after germination) did not influence transmission by aphid or mechanical inoculation.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1971

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