Cinnamyl alcohol and analogs as attractants for corn rootworms (Coleoptera: Chrysomelidae)
1989
Metcalf, R.L. | Lampman, R.L.
Field tests in corn with baited sticky traps focused on changes in species specificity and magnitude of response for Diabrotica barberi Smith and Lawrence and D. virgifera virgifera LeConte when candidate lures varied by functional group, chain length, aryl substituents, saturated and unsaturated sidechains, and isosteric replacement. Cinnamyl alcohol, a major component of the blossom volatiles of Cucurbita maxima Duchesne, and its parakairomone (active synthetic analog), 3-phenyl-1-propanol, were significantly more attractive to D. barberi than eugenol in corn and were also attractive to D. cristata (Harris) in a reclaimed prairie. Neither compound was appreciably attractive to adult western corn rootworms D. v. virgifera and, as previously reported, cinnamyl alcohol is only slightly attractive to adult southern corn rootworms, D. undecimpunctata howardi Barber. The spectrum of rootworm responses to curcurbit blossom components and structurally related compounds amplifies the coevolutionary relationships between Diabroticites and Cucurbitaceae, shows the chemosensory specificity of odor-conditioned behavior in Diabrotica spp., and illustrates the potential of parakairomones as practical insect lures.
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