A portable chamber for the growth and isolation of infected plants.

Abstract : An easily portable unit, consisting of an aluminum tubular frame covered with transparent polyvinyl sheeting, has been developed to contain infected plants and exclude airborne fungal contaminants. A 100-cfm squirrel- cage blower supplies air through a filter to the interior of the chamber, maintaining an internal positive pressure that prevents the entrance of contaminants when the unit is opened. Air is exhausted through a filter at a rate that provides sufficient flow through the chamber to hold the interior air temperature at approximately that of the outside ambient air. This air flow causes no visible agitation of the plants.