Research reports on the management of common scab in potatoes

Management options

11140047 Review of Liming, pH and Common Scab Risk in Potatoes (2018)

• review of relationship between common scab, pH, liming and calcium in potatoes

R448 Common scab control - reducing the irrigation water requirements and understanding the effects of beneficial soil microorganisms (2011 - 2014)

• irrigation scheduling for salad crops and varieties less susceptible to common scab than Maris Piper
• mechanisms by which irrigation reduces the population build-up of pathogenic Streptomyces
• effects of beneficial soil micro-organisms and biofumigation
• soil structure within the ridge/bed and optimal irrigation regimes for scab control
• effects of over-watering on crop growth, tuber quality and nitrogen use efficiency

R429 Effect of contrasting irrigation regimes on populations of Streptomyces and potential antagonists and control of common scab (2009-2010)

• DNA sequencing used to identify groups of microorganisms which may be responsible for suppression of scab
• field experiments with five different irrigation regimes. Weekly sampling of tubers one to five weeks after tuber initiation to determine Streptomyces populations, and at harvest to measure yield and levels of scab

 R272 Integration of precision irrigation and non-water based measures to suppress common scab of potato (2006-2009)

• no consistent effects of non-water based control measures (soil amendments with sulphur or rapeseed meal) on common scab levels

 R248 Review of research on non-water-based approaches to control of potato common scab (2004)

• the Streptomyces species causing disease
• knowledge on 12 non-water control options
• a supplement to the review (written in 2005) covers the potential to use manganese to control common scab, possible biocontrol agents and the effect of organic ammendments on common scab control

Diagnostics

R422 Informing management of potato diseases through epidemiology and diagnostics (international collaboration 2009-2012)

• refers to PREDICTA^® Pt  which is a DNA-based soil and seed peel testing service in Australia