Potato Research

, Volume 32, Issue 3, pp 353–357 | Cite as

A rapid scoring technique for potato tuber disease assessment

  • Helen E. Stewart
  • R. L. Wastie
Short Communication

Summary

Three methods of scoring disease severity were compared on potato tubers infected with either common scab, gangrene or dry rot. For each disease, replicated samples of infected tubers were taken of 12–14 cultivars representing a range of reaction from resistant to susceptible, and disease severity assessed by 1) estimating the proportion of the surface area affected by the disease, 2) calculating the percentage of tubers infected to a pre-determined amount, 3) an overall ‘glance score’ on a 1–9 scale of decreasing infection. The third method gave scores which correlated closely with the others, and since it is direct and simple to use, it has become the preferred method in disease screening tests at the Scottish Crop Research Institute.

Additional key words

dry rot gangrene common scab disease screening 

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References

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Copyright information

© Kluwer Academic Publishers 1989

Authors and Affiliations

  • Helen E. Stewart
    • 1
  • R. L. Wastie
    • 1
  1. 1.Scottish Crop Research InstituteDundeeUK

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