Abstract
A description is provided for Sclerotinia narcissicola. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOST: Narcissus spp. DISEASE: Smoulder, grey mould. Infection may reduce bulb yield and flower size (55, 3617). Symptoms may include: rot of the bulbs and leaves at ground level, brown lesions on the leaves and flower buds, distortion and failure of emergence. GEOGRAPHICAL DISTRIBUTION: Asia: Iraq, USSR; Australasia: Australia (Tasmania, Victoria), New Zealand; Europe: Channel Islands (Guernsey, Jersey), Denmark, Eire, England, Germany, Northern Ireland, The Netherlands, Norway, Scotland, Sweden, USSR, Wales, West Germany; North America: Canada (British Columbia, NS, Ontario, PEI); USA (North Carolina, New York, Oregon, Virginia, Washington State) (see CMI Distribution Maps of Plant Diseases, No. 315). TRANSMISSION: The disease may come from planting of infected bulbs or from infected soil; sclerotia in the soil may be viable for up to nine months (61, 7053). In vitro conidial suspensions did not cause infection except of wounded or damaged tissue; mycelial inoculation consistently caused lesions on detached leaves and bulb scales (61, 5797).
Induced and primed defence responses of Fragaria vesca to Botrytis cinerea infection