BUREAU OF ENTOMOLOGY AND PLANT QUARANTINE 27 
army cutworms, crown aphids, or brown wheat mites. Parathion 
continued to be effective for control of the greenbug and was applied 
over a wide area. However, generally poor development of the wheat 
plants and prospects of low yields because of factors other than green- 
bugs probably deterred many growers from applying insecticides. 
Windy weather in the greenbug-infested area was unfavorable for 
airplane applications of parathion, and temperatures below 50° F. 
reduced the effectiveness of the insecticide. Colonization of ladybugs 
to feed on the greenbugs in Oklahoma had little control value. The 
greenbugs were so numerous in the grain fields that their control by 
ladybugs would have been too costly. Cutworms were controlled in 
preliminary tests with nitroparaffins, DDT, dieldrin, parathion, 
toxaphene, and chlordane. 
Control for Red Harvester Ant Improved 
Better control of the red harvester ant in alfalfa fields in Arizona 
has been obtained in preliminary tests with dieldrin and chlordane. 
Dieldrin was used as a 2- or 2.5-percent dust and chlordane as a 
5-percent dust. Fumigation of the colonies with bromotrichloro- 
methane was also promising for the control of this ant. 
INSECTS AFFECTING MAN 
Research on insects affecting man was important to both the agri- 
cultural and the military activities of this country. An example of 
a major contribution to entomological research for the military is the 
temporary assignment of a specialist in the classification of flies as 
consultant to United States Naval Medical Research Unit 3 in Cairo, 
Egypt, to study a complex problem involving the identification of 
various Egyptian species in the house fly genus Musca. Particular 
attention was given to resistance of the several species to insecticides. 
As a result of the studies, advice was given on the type of research 
that might be most successful. The recommendations significantly 
affected the trend of the research projects. 
This and similar research for the military were supported by funds 
transferred to the Bureau by the Department of Defense. 
Community-Wide Tick-Control Programs Prove Successful 
The American dog tick, carrier of Rocky Mountain spotted fever, 
was controlled successfully in townships on Cape Cod. Community- 
wide control programs were carried out on an experimental basis by 
the Departments of Conservation and Public Health of the Common- 
wealth of Massachusetts, with assistance and technical supervision 
by entomologists from the Orlando, Fla., laboratory. 
DDT sprays, applied at the rate of 1 pound of DDT an acre to 
vegetation along roadways, paths, and other places where ticks con- 
gregate, satisfactorily controlled the pest. The project was sponsored 
in part by the Army Committee on Insect and Rodent Control. 
Search Continues for New Mosquito Insecticides 
The appearance in Florida and California of strains of mosquitoes 
resistant to DDT has necessitated reevaluation of several insecticides 
