ISHS Acta Horticulturae 619: XXVI International Horticultural Congress: Potatoes, Healthy Food for Humanity: International Developments in Breeding, Production, Protection and Utilization
THE USE OF RADIANT HEAT TO REDUCE THE INOCULUM LEVEL OF SILVER SCURF (HELMINTHOSPORIUM SOLANI) ON POTATO TUBERS (SOLANUM TUBEROSUM) BEFORE STORAGE |
| Authors: | T.P.C. Johnson, B.W.W. Grout, C.F.H. Bishop, A. Perera |
| Keywords: | Helminthosporium solani, potato, radiant heat, silver scurf, Woronin bodies |
| Abstract:
Growth and proliferation of undisturbed colonies of Helminthosporium solani [silver scurf disease of Irish potato] in vitro is eliminated by radiant heat treatment above 50°C and lasting 5 minutes. However, detached conidia are resistant to a 3-minute treatment at 70°C, which is sufficiently severe to pose problems when considering treatment of harvested tubers. Washing in hot water to remove conidia, simultaneously providing a heat treatment lethal to the remaining mycelium, is suggested as an alternative method of reducing fungal inoculum levels on seed potatoes. | |
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