Fungicides for control of easter lily root rots

ONE OF THE SERIOUS PROBLEMS in the production of pot-grown lilies for the Easter season involves root and bulb rots. Fungi which have been associated with this problem include Cylindrocarpon radicicola, Fusarium oxyspofum f. lilii, Pythium splendens and Rhizoctonia solani. Because of the different fungi involved, fungicide mixtures have been recommended for control, the most common ones mixtures of pentachloronitrobenzene (PCNB) and ferbam or PCNB and Dexon. Disease control was not always good, or consistent, so new materials have been tested as they became available.