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Insects and Their Gi ontrol 
CORN EAR WORM 
The corn ear worm is a green to brown, nearly smooth caterpillar, often mistaken for a cutworm when 
found within the buds or on the open flowers, 
INJURY It is very destructive to the opening buds, for it feeds on their petals and other parts, de- 
forming if not entirely ruining the flowers. 
CONTROL. If the attacked plants are blooming, spraying is out of the question, but thorough treat- 
ment with a 3 or 5% D.D.T. dust is recommended. After they have worked their way into the 
buds and are found to be feeding on the open flowers, hand-picking is the only remedy. Spray- 
ing the plants with Deenate 50W will control them before the color shows. Parathion fumigation 
will also keep them under control. 
CUTWORMS 
The larva is dull colored and from one to more than two inches in length. They are most active at night, 
and usually spend the day coiled up just under the surface of the soil at the base of the plant. They 
should not be confused with the corn ear worm which cannot be controlled by poison baits. 
INJURY. Cutworms obtain their food by biting out sections of the leaf, stem or bud. Various species 
attack different parts of the plant. The one that is most damaging climbs to the top of the stem 
and eats into the flower buds. 
CONTROL. Those cutworms that feed on the foliage can best be controlled with Deenate 50W spray 
using 1/y pounds to 100 gallons of water. Parathion has been suggested as a good control 
measure, more effective as a spray. 
GREENHOUSE LEAF TYER 
It gets its name from its habit of spinning light webs inclosing two or more leaves or tying together 
the parts of a single leaf. This caterpillar is very active, and when disturbed will wriggle off the leaf, 
often backwards, lowering itself on a silk-like strand. 
INJURY. When first hatched, the larvae eat out shallow holes on the under side of the leave. As 
they grow, they enlarge these holes but usually do not cut through to the upper surface. The result 
is that the leaves become skeletonized. 
CONTROL. The best poison to control the larvae is Deenate 50W, either in the form of a dust or a 
spray. For liquid spray use |!/7 pounds of Deenate 50W to 100 gallons of water. Regular fumi- 
gations with Parathion will keep the leaf tyer under control. 
MEALY BUGS 
Mealy bugs are small, sluggish, whitish, soft bodied insects, measuring up to !/4 inch long, found in 
clusters on the undersides of the leaves or in the leaf axils. 
INJURY. This pest sucks the juices from the stems and leaves, discoloring and deforming the foliage. 
CONTROL. Parathion is the most effective. Regular fumigations with Calcium Cyanide will aid in 
keeping mealy bugs in check, 
Corn Ear Worm Damage Leaf Tyer Mealy Bugs 
