Echinacea seedlings showing withered leaves. Damping-off caused by Rhizoctonia can spread quickly through unsterilized soil. One-month old seedlings infected with Rhizoctonia solani . Cotyledons and first leaf have lost their turgidity and started to wilt. Rhizoctonia root rot.
Lower stem appears discolored.
Affected stems may have a smaller diameter than healthy sections, giving the stem a pinched appearance. Cotyledons may senesce prematurely. Control measures 1. No seed treatments are currently registered for use on echinacea in Canada. Fusarium root and crown rot Fusarium spp.