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Abstract
The present study was undertaken to investigate the role of many methods to evaluate their ability to reduce development of potato dry rot disease. i.e. twelve antagonistic bioagents, a fungicide (thiabendazole), three abiotic agents (i.e. chitosan, salicylic acid and catechol), compost and bio-compost against F. culmorum growth. Obtained results revealed that T. viride 1 and T. harzianum, chitosan and salicylic acid were more effective than catechol. In addition, concentrations between 40 and 45 ppm showed highest inhibition of mycelial growth. The in vivo experiment in storage condition showed that the abiotic agents have high ability to reduce dry rot disease compared with bioagents