CHRYSANTHEMUM 
CUTTINGS 
Diseases and Their Control 
RAY BLIGHT OR FLOWER SPOT 
SYMPTOMS. The petals first show little spots and then the entire petal begins to rot. May be caused 
by Botrytis or Ascochyta, Botrytis is spread primarily by splashed water. 
CONTROL. It is controlled by lowering humidity or spraying plants with Parzate when they show 
color. Spray with Parzate | ounce to 4 gallons of water plus ‘4 teaspoonful of Du Pont Spreader 
Sticker on the flower from below and above as soon as color shows and continue at 5-day in- 
tervals. 
ROOT KNOT NEMATODE 
SYMPTOMS. The nematodes or eelworms bore into the roots of the plants and cause knots or galls 
to develop on the root systems. As a result the plants are weak, yellowish and stunted in growth. 
CONTROL. Steam sterilization of the soil is very effective in eliminating the nematodes. Dowfume G 
is a good soil fumigation that will kill nematodes and not do any damage to the surrounding plants. 
RUST 
SYMPTOMS. Chocolate brown powdery pustules on lower surface of the leaves. 
CONTROL, Fermate, Liquid Parzate or Parzate, | 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 the tops into Fermate (2 tablespoonfuls to a gallon). 
Spray the plants with Zerlate or Fermate | ounce to 4 gallons of water plus 3 teaspoonful of 
Du Pont Spreader Sticker every ten to fourteen days. Cloth house mums should be kept covered 
until the buds can be seen. 
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 Growing on Mums Septoria Leaf Spot 
