Abstract
Acibenzolar-S-methyl (ASM) is a synthetic analogue of salicylic acid developed for use in a novel strategy for crop protection through systemic acquired resistance (SAR). ASM protected cantaloupe against a fungal pathogen, Colletotrichum lagenarium, and a viral pathogen, cucumber mosaic virus (CMV). ASM induced the systemic accumulation of chitinase, a marker protein for SAR, in both greenhouse and field grown seedlings. ASM at 50 or 100 μg/ml provided almost complete protection against the fungal pathogen and effectively delayed the spread of CMV in greenhouse trials. In two field trials, ASM had no negative effect on fruit production in the absence of CMV disease pressure.
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