of Helicoverpa armigera males to varying blends of its two sex pheromone components. In
the pheromone septa that were used to bait the pheromone traps varying blends were
impregnated and the ratio of Z-9: hexadecenal to Z-11: hexadecenal in them varied from 0:
100 to 15: 85. Results indicated geographical variation in response of males to varying
blends of the two sex pheromone components, suggesting male sex pheromone response …