See:
Greenhouse Plants, Ornamental - Gray Mold
Notes Botrytis fungi colonize dead, dying, and wounded plant parts. From these infections they can attack healthy tissues. A moist, humid environment is ideal for disease development. It is found everywhere plants are grown and has a wide host range. Blossom blight, leaf spots, and bud and stem rots are common. In humid conditions, a brown to gray fuzzy fungal growth appears on the infected plant part. Leaf blights can start when infected floral tissue falls on healthy leaves. An integrated strategy combining environmental management, cultural practices, and fungicides will most effectively manage this disease.
Chemical control Best when used on Aphelandra along with cultural controls. Tank-mix and/or alternate products from different groups with different modes of action to prevent the build-up of resistant fungi.
- Astun at 10 to 17 fl oz/100 gal water. Group 7 fungicide. 12-hr reentry.
- Chipco FLO at 1 to 2.5 quarts/100 gal water. Limit to two (2) applications per year to aid resistance management. Group 2 fungicide. 12-hr reentry.
- Terraguard SC at 4 to 8 fl oz/100 gal water. Group 3 fungicide. 12-hr reentry.