



| See Doel oie (OR 
ROOT ROT 
SYMPTOMS. Entire plant will wilt and recover during the evening. Foliage turns yellow, plant will die 
in a very short time. A number of soil borne organisms cause the loss of the roots. 
CONTROL. Do not plant cuttings that have been infected with damping off. Use sterilized soil. 
Remove all affected plants when noticed. Do not keep the soil too moist. 
RUST 
~ SYMPTOMS. Chocolate brown powdery pustules on the lower surface of the leaves 
CONTROL. Fermate, | ounce to 4 gallons of water is most effective. 
SEPTORIA LEAF SPOT OR LEAF BLIGHT 
SYMPTOMS. Distinct circular spots on the leaves. These are greyish brown in color and become 
brittle in the center. Affected leaves may turn yellow and die. More prevalent in the open. 
Some varieties are more susceptible than others. Sea Gull is very susceptible. 
CONTROL. When cuttings are received dunk roots and tops into Fermate (2 tablespoonsful to a gallon). 
Spray the plants with Fermate | ounce to 4 gallons water plus '4 teaspoonful of DuPont Spreader 
Sticker every ten to fourteen days. Cloth house mums should be kept covered until the buds can 
be seen. May we recommend that you add the sticker and a little water into a jar then add the 
Fermate and shake thoroughly. Then dump Fermate from the jar into sprayer with proper 
amount of water. 
VERTICILLIUM WILT OR SEIDEWITZ DISEASE 
SYMPTOMS. Margins of leaves turn yellow and eventually wilt or dry up. This begins at base of 
plant and works up the stems. May affect one side of a stem or plant more than the other. No 
distinct spots. Varieties vary in resistance to this disease. 
CONTROL. Verticillium wilt can be avoided by purchasing our disease free cuttings produced from 
cultured stock. It is also necessary to plant only into sterilized soil. 
DODDER 
SYMPTOMS. Dodder is a parasitic twiner, bearing clusters of small flowers. They are leafless annuals, 
with very slender yellow, white or red stems, which become attached to the plant by means of 
root-like suckers. Dodder is occasionally found on chrysanthemums and will cause a complete 
loss of crop. 
CONTROL. Dodder is common in low, weedy places and may be carried into the greenhouse in the 
soil or manure. Soil sterilization is the only prevention. After dodder is attached to the plants 
remove the affected plants and burn. 
27 

Rust on Chrysanthemum Septoria Leaf Spot 
