Figure 4 shows the seasonal egg count in both the lighted 
and unlighted fields. Again, the arrows pointing toward the 
X coordinate indicate when insecticide was applied to the un- 
trapped field. In addition to the 10 designated applications, 
an undesignated application of 1/2 pint Bidrin (3-hydroxy-N,N- 
dimethyl-ciscrotonamide dimethyl phosphate) per acre was applied 
on May 28. No insecticides were used on the trapped field. The 
egg count record indicates that the insect traps were as 
efficient as the 10 applications of insecticides in keeping the 
egg count under control. Also little if any difference appeared 
to exist in the attractiveness of insecticide treated blocks 
versus untreated blocks of cotton as sites for oviposition by 
H. zea moths. 
50 
40 
UNLIGHTED, INSECTICIDE 
30 ———-— UNLIGHTED, NO INSECTICIDE 
—o— LIGHTED, NO INSECTICIDE 
+H. ZEA EGGS PER 100 TERMINALS 
fe) 20 3| 10 20 3| 10 20 
JULY AUGUST SEPTEMBER 
Figure 4,--Oviposition records from trapped vs. 
untrapped and from treated vs. untreated plots 
of > cotton. 
