Epidemiology of the carrot motley dwarf virus complex on parsley
1997
Vercruysse, P. | Meert, F. | Tirry, L. | Hoefte, M. (Universiteit Gent (Belgium). Faculteit Landbouwkundige en Toegepaste Biologische Wetenschappen) | Bleyaert, P.
For over more than 15 years is carrot motley dwarf, a virus disease transmitted in a persistent way by the willow-carrot aphid (Cavariella aegopodii), one of the most important parsley diseases in Belgium. In this epidemiological study the vector of the CMD disease as well as the presence of CMD-symptoms on parsley are investigated. Aphid captures with Moericke-traps indicated the most important flight periods of C. aegopodii. Furthermore, the population development of the aphid vector on parsley was determined. For this, an aphid extraction method was worked out that proved to be very efficient and allowed to analyse a large number of samples within a short period. Except at the beginning of the growing season, the population of C. aegopodii showed a parallel development at two different crop planting dates. By the beginning of August, the vector was present on all sampled parsley plants. Symptoms of CMD on parsley appeared considerably later than C. aegopodii. On parsley planted after the first flight peak of the aphid vector, CMD symptoms appeared later and the number of parsley plants showing reddening of the leaves was considerably lower.
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