Rhizoctonia Efficacy – 2023

Begonia leaves

Research Summary Abstract

From 1999 to 2023, 44 products or active ingredients were evaluated for Rhizoctonia solani management in greenhouse experiments as soil drench, soil incorporation, foliar or soak application, and in field experiments as soil drenches. Experiments were conducted on begonia, boxwood, chrysanthemum, dianthus, garden impatiens, juniper, maple, marigold, petunia, poinsettia, rhododendron, snapdragon, viburnum, vinca, and zinnia. The relatively new registered products Affirm/Endorse/Veranda O (polyoxin D), Empress Intrinsic (pyraclostrobin), Heritage (azoxystrobin), Medallion (fludioxonil), Mural (azoxystrobin + benzovindiflupyr) and Pageant Intrinsic (pyraclostrobin + boscalid) showed excellent efficacy. For those not yet registered for this disease, sufficient efficacy was observed with Astun, Avelyo, BAS 673, MBI-121, and SP2478 to recommend adding R. solani to target pathogens. SP2700 shows promise as part of an overall resistance and disease management plan

Link to Summary: Rhizoctonia Efficacy Summary