Figure 5.

Composition of male pheromone in corn borers. (A) Partial gas chromatograms of hairpencil extracts from virgin 4-day-old ECB Z, ECB E and Asian corn borer (1, Z9-16:OAc; 2, Z11-16:OAc; 3, 16:OAc; 4, Z14-16:OAc). (B) Plot of canonical discriminant function scores for each species or strain for the first two functions accounting for 89.2% and 10.8% of the total variance explained. The four variables were absolute amount of individual compounds, all transformed (Y = log₁₀ (amount + 0.1)).