Technical Abstract: Lichnanthe vulpina (Hentz) (Coleoptera: Scarabaeidae), commonly called the cranberry root grub, is a scarab beetle with a long history as a root-feeding pest of cranberry beds in Massachusetts. The larvae feed on the roots of the cranberry plant, reducing yield as well as vine density. Both (Z)-7-hexadecanol and (Z)-7-hexadecanal were identified from the female effluvia collection by gas chromatographic-electroantennographic detection and gas chromatography-mass spectrometry. The double-bond position was confirmed by dimethyl disulfide derivatization. Field assays using the synthetic compounds showed activity for both however (Z)-7-hexadecanol alone maximized male trap catch. The addition of (Z)-7-hexadecanal to (Z)-7-hexadecanol did not statistically affect male capture. Flight activity of cranberry root grub may be monitored with traps baited with rubber septa containing 300 µg of (Z)-7-hexadecanol. A test of trap vane colors indicated that traps with green or red vanes maximizes target male catch while minimizing non-target catch of bumblebees, honeybees, and solitary bees, important pollinators of cranberries.