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CoLOKADO Experiment Station 
ting or use healthy plants. Spray with Bordeaux mixture (4-4-50) 
before the blossoms open. In case of ‘severe infection mow and burn 
over the patch just after harvesting. A new set of leaves will be 
formed free of the disease. 
TOMATO 
Blight (Fusarium lycopersici) (82), (83) — The first indications of 
blight is a yellowing of the lower leaves followed by wilting and 
dying. After a period of time which varies with the weather and the 
severity of the attack, the entire plant may wilt and die. The woody 
portions of affected stems are browned. This can easily be detected 
by pulling off the larger leaves and noting the brownish dots on 
the leaf scar. 
The disease is caused by a fungus that lives from year to year 
in the soil. Spraying is of no avail. Crop rotation and the use of 
resistant varieties are the only means of control. 
Blossom-End Rot (84), (85) — This is a non-parasitic disease due 
probably to improper moisture relations. Decay starts usually on half 
grown tomatoes as a slightly sunken black spot which spreads 
rapidly until the entire fruit is destroyed. 
Spraying has no effect on blossom-end rot. Since dry soil con- 
ditions seem to favor the development of the disease, an abundant 
regular supply of moisture should be maintained. 
