BUREAU OF EXTOMOLOGY AND PLANT QUARANTINE 83 
Life History of Phony Peach Vectors Determined 
Life history studies were made to determine the seasonal develop- 
ment of the insects that transmit phony peach and to obtain informa- 
tion as to their habits. It was learned that two species, Homalodisca 
triquetra (F.) and Oneometopia undata (F.), have two full genera- 
tions annually and a partial third. Cuerna costalis (F.) has three full 
generations. Grafhocepliala versuta (Say) has four. The two spe- 
cies known to be natural vectors are those exhibiting the slowest de- 
velopment. O. undata appears to be more prevalent on peach trees 
in spring, while II. triquetra predominates during the late summer and 
fall. The latter species, apparently the primary vector, occurs in 
greatest numbers in late June and July. Present evidence is that it 
does not feed on peach trees to any extent at that season. The infor- 
mation on life history and seasonal behavior is being used to determine 
the proper scheduling of spray applications. 
AIRCRAFT AND SPECIAL EQUIPMENT CENTER 
By centralizing aircraft and special equipment used for demon- 
strating improved pest control procedures at the Bureau's Aircraft and 
Special Equipment Center, Cimarron Field, Okla., provision has been 
made for coordinating the Bureau's interest in this general field. 
The Bureau has taken full advantage of work carried on by 
State, private and other Federal agencies that can contribute techni- 
cal information on methods of applying insecticides with efficiency 
and safety. This has allowed the closing of Bureau-operated auto- 
motive and mechanical shops and a reduction of personnel assigned 
to such work. Maintenance and repair work required on regular 
automotive equipment is now done on a contract basis. 
