Transmission and Control ofPythium aphanidermatumin an Ebb-and-Flow Subirrigation System

Pythium aphanidermatum was consistently transmitted to healthy potted cucumber (Cucumis sativus «County Fair») plants grown in an ebb-and-flow subirrigation system when the irrigation solution was artificially infested. In contrast, transfer of the fungus was low and sporadic when some plants growing in infested medium were placed in the system among plants growing in noninfested medium. Metalaxyl was more effective than etridiazole in controlling Pythium infection when granular formulations were incorporated into the growing medium