The EPPO Standard “PP 1/319 (1) General principles for efficacy evaluation of plant protection products with a mode of action as plant defence inducers” describes the conduct of trials for the efficacy evaluation of plant defence inducers (PDIs) products and sets the definition of PDIs.
The efficacy demonstration of a PDI should be based on:
– The preliminary evaluation of the absence of direct effect of the PDI on the target pest (under controlled conditions)
– Efficacy trials to evaluate the level of efficacy of the stand-alone PDI product
As PDIs are rarely recommended to be used alone, the Standard also precises how to set up trials to evaluate the PDI efficacies in mixture or in an integrated pest management (IPM) program.
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