Susceptibility of newly bred potato cultivars to black dot and silver scurf (original) (raw)
Abstract
Introduction In Switzerland, the fresh consumption market washes a large part of the potatoes for better display in the shops. Newly bred cultivars with beautiful presentation have a delicate skin, susceptible to many skin diseases. Among those, black dot (Colletotrichum coccodes) and silver scurf (Helminthosporium solani) have an important impact on tubers quality. They contribute to visual deterioration and weight loss during storage [1, 2]. The distribution of these two diseases in seed tubers and in the soil is very large in Europe [3]. The pathogens symptoms increase first in the soil, after harvest, during the conservation and after washing and packing process. The symptoms can quickly evolve when the conditions are favorable to diseases development [3, 4]. Material and Methods Each year in Switzerland, 20 to 25 newly bred potato cultivars, mainly from European breeders, are tested in four locations under field conditions. Each variety is tested for at least two consecutive ye...
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