<Emphasis Type="Italic">Spongospora subterranea</Emphasis> soil contamination and its relationship to severity of powdery scab on potatoes |
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| Authors: | Takato Nakayama Mitsuo Horita Tadayuki Shimanuki |
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| Institution: | (1) National Agricultural Research Center for Hokkaido Region, Hitsujigaoka 1, Toyohira, Sapporo 062-8555, Japan;(2) Present address: National Institute for Agro-Environmental Sciences, 3-1-3 Kannondai, Tsukuba 305-8604, Japan |
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| Abstract: | We investigated soil contamination by Spongospora subterranea f. sp. subterranea (Sss) and disease severity of powdery scab in 29 potato fields in Hokkaido, Japan, using a hydroponic culture method with
tomato seedlings as bait plants. The quantity of Sss infection on the roots of bait plants was evaluated using the polymerase
chain reaction (PCR) and expressed in terms of the infection potential in the soil. The infection potential was positively
correlated with the disease severity of harvested tubers, whereas the spore ball density determined using PCR had an indistinct
relationship with disease severity. The infection potential can be useful in evaluating soil contamination and in applying
countermeasures against powdery scab. |
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| Keywords: | Bait plant Hydroponic culture Infection potential Polymerase chain reaction (PCR) Powdery scab of potato Spongospora subterranea f sp subterranea |
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