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Relationship between the application of foliar chemicals to reduce common scab disease of potato and correlation with thaxtomin A toxicity

Citation

Tegg, RS and Corkrey, R and Wilson, CR, Relationship between the application of foliar chemicals to reduce common scab disease of potato and correlation with thaxtomin A toxicity, Plant Disease: An International Journal of Applied Plant Pathology, 96, (1) pp. 97-103. ISSN 0191-2917 (2012) [Refereed Article]


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Copyright Statement

Copyright 2012 American Phytopathological Society

DOI: doi:10.1094/PDIS-05-11-0397

Abstract

Production of the phytotoxin thaxtomin A by pathogenic Streptomyces spp. is essential for induction of common scab disease in potato. The disease can be significantly reduced by a range of chemicals applied as foliar sprays before tuber initiation. We tested a range of chemicals that had previously demonstrated varying capacities to reduce common scab for both disease suppression and their ability to inhibit thaxtomin A toxicity in both 'Desiree' and 'Russet Burbank' potato. Our results for disease suppression generally supported previous studies. Our tuber slice assays with thaxtomin A showed a strong correlation between the ability of the chemical to suppress common scab symptom development and the ability of the chemical to inhibit thaxtomin A toxicity. A Bayesian measurement error linear regression model was derived for each cultivar and trial and demonstrated a clear positive relationship between disease and thaxtomin-A-induced necrosis. The relationships obtained were much stronger than would have been obtained without adjustment for measurement error. This demonstrates that disease mitigation using chemical foliar sprays is strongly correlated with the ability of the chemical to inhibit thaxtomin A toxicity, suggesting this mechanism as a key mode of action for understanding this novel disease control strategy. © 2012 The American Phytopathological Society.

Item Details

Item Type:Refereed Article
Keywords:Solanum tuberosum, Streptomyces
Research Division:Agricultural and Veterinary Sciences
Research Group:Crop and Pasture Production
Research Field:Crop and Pasture Protection (Pests, Diseases and Weeds)
Objective Division:Plant Production and Plant Primary Products
Objective Group:Horticultural Crops
Objective Field:Vegetables
Author:Tegg, RS (Dr Robert Tegg)
Author:Corkrey, R (Dr Ross Corkrey)
Author:Wilson, CR (Associate Professor Calum Wilson)
ID Code:70388
Year Published:2012
Web of Science® Times Cited:9
Deposited By:Agricultural Science
Deposited On:2011-06-16
Last Modified:2013-05-13
Downloads:0

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