Fusarium Management on Cyclamen, 2002
Cornell University
Dr. M. Duaghtrey & M. Tobiasz
Long Island Horticultural Research & Extension Center
Riverhead, NY
Objective: Evaluate biological controls together with high pH and fungicide application, for their ability to reduce cyclamen losses caused by Fusarium wilt disease (Fusarium oxysporum).
Method: Seedling plugs of cyclamen 'Sierra Scarlet' were transplanted into pots containing Cornell peat-lite mix. Instead of the standard dolimitic lime, the mix was prepared with 15 lbs dolomitic lime in order to raise the pH and make it more suppressive to the disease. Each plant was then inoculated with cultured Fusarium oxysporum. Companion® Biological Fungicide was applied beginning on June 18 and reapplied every 14 days. Cleary's 3336 was applied once per month. All other materials were applied only once. The Fusarium inoculum was applied on July 3. Disease symptoms appeared on Sept. 29. By close of experiment over half of the inoculated, untreated plants were dead. Vascular discoloration was closely correlated with the above-ground symptoms.
Results: The most effective treatment was the 14-day interval drench with Companion. These results are very promising, and suggest that biological materials may be as effective as fungicides.
Companion® is a registered trademark of Growth Products, Ltd., Plant Shield® HC is a registered trademark of BioWorks, Inc., Cleary 3336® 50 WP is a registered trademark of Cleary Chemical Corp., Actinovate® is a registered trademark of Natural Industries, Inc., BioPhos® is a registered trademark of Sieber Fertilisers Ltd.