Calceolaria Diseases
Gary W. Moorman, Professor of Plant Pathology
| Disease | Symptoms | Pathogen/Cause | Management |
|---|---|---|---|
| BOTRYTIS BLIGHT | Leaves, especially those near the soil surface, rot and become covered with gray fungal growth as do fading flowers. | Botrytis cinerea | Heat and ventilate to maintain low humidity. Remove dead and dying tissue from the greenhouse. Apply chlorothalonil. |
| PHYTOPHTHORA ROOT AND CROWN ROT | Crowns and roots have dark brown spots at the soil level. This spreads up the stem as plants wilt and die. Roots are killed. | Phytophthora spp. | Plant in pasteurized potting mix. Discard infected plants. Apply etridiazole to protect healthy plants. |
Active Ingredients and Trade Names of the Chemicals
| FRAC Group No. | Risk Leve | Class | Active ingredient | REI Restricted Entry Interval | Trade names (EPA Reg. No) |
|---|---|---|---|---|---|
| 14 | 1 | Thiadiazole | etridiazole | 12 | Truban (58185-7), Terrazole (400-416) |
| M | 1 | Chloronitrile | chlorothalonil | 48 | Daconil (50534-9), Exotherm Termil (70- |
| 223) | |||||
| 12 | Echo (60063-7), PathGuard (60063-7-499), Concorde (72167-24-1812), Pegasus (72167-24-1812) |
DISCLAIMER
Notice: The user of this information assumes all risks for personal injury or property damage.
Warning! Pesticides are poisonous. Read and follow all directions and safety precautions on labels. Handle carefully and store in original labeled containers out of the reach of children, pets, and livestock. Dispose of empty containers right away, in a safe manner and place. Do not contaminate forage, streams or ponds.
Issued in furtherance of Cooperative Extension work, Acts of Congress, May 8 and June 30, 1914, in cooperation with the U. S. Department of Penn State College of Agricultural Sciences research and extension programs are funded in part by Pennsylvania counties, the Commonwealth of Pennsylvania, and the U.S. Department of Agriculture.
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