Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Popp, M. P., R. C. Wilkinson, E. J. Jokela, R. B. Harding, and T. W. Phillips. 1989. Effects of slash pine phloem nutrition on reproductive performance of Ips calligraphus (Coleoptera: Scolytidae) . Environmental Entomology 18:795-799.