Characteristics of Alternaria alternata strawberry pathotype isolated in New Zealand and the resistance of the 'Akita Berry' strawberry to the fungus.

摘要

Cultural characteristics, morphology and pathogenicity of ICMP-2487, a New Zealand isolate of A. alternata strawberry pathotype, were compared with 5 Japanese isolates (OH-5, 90-12, MO-1, SN-3 and MA-2). The resistance of a new strawberry cultivar designated as Akita Berry to a New Zealand isolate (ICMP-2487) was investigated. No differences between the New Zealand and Japanese isolates occurred in the growth and colours of colonies, shapes, sizes and septa of conidia. The pathogenicity of ICMP-2487 to 58 strawberry cultivars and strains, 4 pear cultivars, 3 cabbage cultivars, 3 tomato cultivars, 3 Welsh onion cultivars, 2 carrot cultivars and 2 sunflower cultivars were similar to those of Japanese isolates. No lesions developed on Akita Berry after inoculation of ICMP-2487 and Japanese isolates. It is concluded that Akita Berry is resistant to the A. alternata strawberry pathotype isolates occurring in Japan and New Zealand.