02209nas a2200169   4500008004100000020001400041245009800055210006900153260000800222300001400230490000700244520158700251653002801838100002201866700002801888856012301916       2011                        eng d  a0098-033100aOleoresin Chemistry Mediates Oviposition Behavior and Fecundity of a Tree-Killing Bark Beetle0 aOleoresin Chemistry Mediates Oviposition Behavior and Fecundity   cNov  a1177-11830 v373 aMany herbivores are sensitive to the secondary chemistry of their host plants. However, the influence of pine secondary chemicals (monoterpenes) on bark beetle fitness is poorly understood. We tested the hypothesis that the monoterpene composition of the phloem oleoresin of ponderosa pine, Pinus ponderosa var scopulorum, mediates rates of host acceptance, oviposition behavior, and fecundity of the western pine beetle, Dendroctonus brevicomis. We performed reciprocal rearing experiments, controlling for the monoterpene composition (chemotype) of host material. We tested the effects of two geographically interspersed host chemotypes on beetles with unknown (wild) and known (reared F1) chemical histories. Host chemotype and insect chemical history did not affect rates of acceptance of host material by female beetles. Insect chemical history affected egg gallery construction, and beetles constructed egg galleries that were on average 24.3% longer when reared in host material that was chemically similar to their natal host material. However, mean egg gallery lengths did not differ between host chemotypes. Insect chemical history also influenced fecundity: F1 beetles produced 52.7% more offspring on average when reared in host material that was chemically similar to their natal host. Our experiments demonstrate that the chemical history of bark beetles mediates egg gallery construction and fecundity, but not host acceptance. This implicates chemical history as a more important factor than host chemotype in the oviposition behavior and fecundity of D. brevicomis.10aDendroctonus brevicomis1 aDavis, Thomas, S.1 aHofstetter, Richard, W.  uhttps://weevil.myspecies.info/oleoresin-chemistry-mediates-oviposition-behavior-and-fecundity-tree-killing-bark-beetle