Several other sesiid moth species of interest were caught. Synanthedon culiciformis, a species attacking alder and birch, were caught in the traps baited with (Z,Z)-3,13-octadecadien-1-yl acetate, as were S. canadensis, a species previously only known from Alberta and Utah. Sesia spartani, a species previously only found in Michigan, was caught in traps baited with (Z,Z) -3,13-octadecadienol.
 

A survey of four orchards were for old and fresh pitch moth attack was conducted during July and August of 1996. Each pitch mass was counted as one attack. Clone number, diameter at breast height, vigour, and gaps (the number of missing trees surrounding the tree), were also measured and recorded for each tree. In all four orchards, clone significantly affected the probability of any tree in the orchard being attacked by pitch moth in the presence of all other variables (P<0.005). Tree location and diameter at breast height (DBH) were significant in three of the four orchards (P<0.05). In two of the four orchards, the presence of previous pitch moth attack had a significant effect on the probability of any tree in the orchard being attacked (P<0.05). The significance may be due to pitch masses on the tree containing attractive resin volatiles, or an inclination of the female moth to simply oviposit on the same tree from which she emerged.

Analysis of resin flow in "resistant" and "susceptible" clones showed that flow over 24 hours differs significantly among different clones, but not between the susceptibility categories. Analysis of resin terpene levels in the phloem showed that the relative levels of delta-3-carene explained over 40 % of the variation in the number of attacks, indicating that clones could be selected for reduced susceptibility on the basis of this monoterpene alone.