—_ 
~15~ 
emergence last fall vefore planting time, retarded emergence and ob- 
structed oviposition were apparently due to widely fluctuating tempera~ 
tures, 
7 

: Average larvae and 
Plot $ Culms infested ; puparia per 100 culms 
: Percent $ Number 
Irrigated------------ : Ae iT ; 
Nonirrigated--------~ : BOT ee nies | 2el 
Riverside~------- ---=3 8.5 PLLA : i184 
Upland~-------------- H Jef : 152 

Egg. deposition by < caged hessian flies»--E. Te. Jones, Wichita, re- 
ports “that in making tests of the effect of an essential plant-food ele- 
ment on fly resistance end of hybrid selections, involving 72 individually 
caged flats, the introduction of 841 pairs of flies (in 5-pair lots) was 
necessary before he obtained a satisfactory number of eggs. In similar 
tests involving 18 small field cages, 52% pairs of flies were required 
before a satisfactory deposition could be obtained. 
