ISHS Acta Horticulturae 708: V International Strawberry Symposium
SURVIVAL OF COLLETOTRICHUM ACUTATUM IN DEAD PLANT MATERIAL AND SOIL IN FINLAND |
| Authors: | P. Parikka, A. Lemmetty, E. Pääskynkivi |
| Keywords: | Strawberry, plant residues, black spot, PCR, latent infection |
| Abstract:
Colletotrichum acutatum was detected for the first time in Finland in 2000 in imported strawberry plants. Whenever they are detected, infected plants are destroyed to avoid further spread of the pathogen. The survival of C. acutatum in infected plant material was studied in 2002-2003 with artificially infected strawberry leaves, crowns and berries. The plant material was placed outdoors and in an un-heated greenhouse on the soil surface, and buried at two depths in sandy soil. The plant residues were removed in May, June and July, and the material was used as inoculum for young strawberry plants used as baits in greenhouse trials. C. acutatum survived the winter both on the soil surface and covered with soil. The survival of C. acutatum infection in the soil of naturally infected strawberry fields was also studied with bait plants in a greenhouse. Positive PCR results were achieved from the bait plants planted in tested soil samples after eight weeks. | |
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