Different in‐planta and ex‐planta activities of 7‐chloro‐4‐(2‐trifluoromethylphenoxy)quinoline againstPyricularia griseadue to volatilization

摘要

Abstract7‐Chloro‐4‐2‐(trifluoromethyl)phenoxyquinoline (L Y248908) strongly inhibits mycelial growth ofPyricularia griseain ex‐planta assays but, when applied to the foliage of rice seedlings, its protective and curative properties againstP. griseaare poor. The principal cause for this difference was found to be volatilization of LY248908 from treated foliage. Variations in fungal sensitivity (due to strain or development stage) and compound loss due to translocation, sequestration, metabolism, or degradation were shown not to be si