Karyology of pseudogamous Ips bark beetles

Interactions of Root Disease and Bark Beetles

Associations between root diseases and bark beetles (Scolytidae) constitute some of the most serious pest complexes affecting forests in North America and elsewhere. The interactive functioning of these pests derives from the following relationships: 1) root diseases predispose trees to bark beetle infestation by lowering resistance, and perhaps increasing attractiveness, of trees to the attack...

Chiral and Nonchiral GC×GC/TOFMS Analysis of Natural Compounds: The Case of Possible Aggregation Pheromones of Chinese Bark Beetles Ips shangrila and Ips nitidus

Sex attractants in frass from bark beetles.

Shortly after Kangas et al. (1) reported that a-terpineol was the major component of a primary host attractant for Blastophagus piniperda L., Silverstein, Rodin, and Wood (2) revealed the identity of three other terpene alcohols that play a role in the orientation of bark beetles. However, Silverstein et al. concluded, from laboratory bioassay, that a mixture of the three terpene alcohols they ...

Population Genetics of Spruce Bark Beetle Ips typographus (Col., Scolytidae) and Related Ips Species1

Enzyme electrophoresis proved to be a useful method to study population genetic aspects in Ips typographus (L.) because of three highly polymorphic loci. Aspartate aminotransferase locus-2 (Aat-2), physiologically involved in the transfer of aminogroups, has six alleles per population. Amylase locus1 (Amy-1), physiologically involved in the hydrolysis of starch, has 10 alleles per population, a...

Application of Bark Beetle Semiochemicals for Quarantine of Bark Beetles in China