Aerobiology ofSclerotinia sclerotiorumandBotrytis cinereaspores in New Zealand tobacco crops

摘要

The seasonal abundance of ascospores ofSclerotinia sclerotiorum(Lib.) de Bary in the air depended on rainfall moistening the soil sufficiently for apothecia to develop. No other climatic factors were found to be related to the trapping pattern. Conidia ofBotrytis cinereaPers. ex Fr. were released in large numbers if the previous day was calm and the night warm, or when rain was falling. Few conidia were released at night unless rain was falling. Ascospores ofS. sclerotiorumand conidia ofB. cinereaboth showed markedly diurnal distribution patterns.