EPIDEMIOLOGICAL RESEARCH ON BOTRYTIS DISEASES OF TULIP PLANTS CAUSED BY B. TULIPAE AND B. CINEREA

We investigated the relationship between B. tulipae- and B. cinerea-induced Botrytis disease of tulip plants and the conidial densities in the air of an experimental field at Ibaraki University as well as of a tulip orchard in Kasumigaura Park (Tuchiura city, Ibaraki) in 2003. For two years prior to this investigation, the park was the focus of research, while the experimental field was cultivated with tulips for the first time.
The dispersal of B. cinerea spores commenced in the early stages of tulip growth, while that of B. tulipae began just before flowering.
For both Botrytis species, the number of dispersed spores increased with tulip plant growth.
Differences in the development of Botrytis disease (formation of blight lesions) were observed between the two research sites.
Numerous blight lesions formed on the leaves throughout the growth period of plants grown in the park.
However, in the experimental field, relatively few lesions were observed and these occurred in the latter periods of growth.
At both research sites, only B. tulipae was isolated from these lesions.
Unlike in 2001 and 2002, when B. cinerea was isolated from the lesions, this fungus was not detected at either of the research sites in 2003.

IX International Symposium on Flower Bulbs

K. Yamada, T. Aoki, C. Ikeda, Y. Ichiman, Y. Kanno, T. Suzuki, H. Nagashima, M. Nakajima, K. Akutsu

Botrytis tulipae, B. cinerea, tulip

https://doi.org/10.17660/ActaHortic.2005.673.61