Dip bulbs in thiophanate methyl before planting. Bulb Storage Rot Bulb scales have brown spots and a severe rot. Bulbs may be soft and covered with a blue-green mold or white fungal growth. Do not plant affected bulbs. Botrytis Blight Oval to circular reddish-brown spots form on leaves.
Brown spots develop on flowers.
Avoid overhead irrigation. Apply a combination of vinclozolin and mancozeb as a spray. Leaf Scorch Semicircular dead areas develop along leaf margins and may engulf leaf tips. Avoid the use of super phosphate and other fluoride-containing fertilizers. Control root rots.