New Information about Take-All Decline and Its Relevance to Research on the Control of Take-All by Biological Control Agents
Those working on biological control agents (BCAs) regard the phenomenon of take-all decline (TAD) as a natural model for biological control of take-all of wheat, caused by Gaeumannomyces graminis var. tritici (Thomashow and Weller, 1990). There is still much that is not known about TAD, so the extent to which current BCAs simulate the mechanisms of TAD is debatable; but if they do, the findings reported here have implications for a) interpretation of work based on seedling-infection tests, b) the limits within which BCAs might be expected to operate effectively and c) the development of realistic and adequate tests for BCAs.
KeywordsWinter Wheat Biological Control Agent Wheat Crop Disease Suppression Disease Progress Curve
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