- Gerken, B., and P. Hughes. 1976. Hormonale Stimulation der bio Biosynthese geschlechtsspezifischer Duftstoffe bei Borkenkafern. Zeitschrift für Angewandte Entomologie [=Journal of Applied Entomology] 82:108-110.
- Hughes, P. R. 1974. Myrcene: a precursor of pheromones in Ips beetles. Journal of Insect Physiology 20:1271-1275.
- Renwick, J. A. A., P. R. Hughes, and I. S. Krull. 1976. Selective production of cis- and trans-verbenol from (-)- and (+)-alpha-pinene by a bark beetle. Science Magazine 191:199-201.
- Cleland, D. I., D. F. Kocaoglu, D. C. Allen, D. W. Rose, C. E. Stegman, J. Abara, J. M. Hughes, T. R. Bell, and M. T. Mengoli. 1982. Methods used to evaluate the U.S. Department of Agriculture, Combined Forest Pest Research and Development Programs. Entomological Society of America, Bulletin 28(2):119-128.
- Gerken, B., and P. Hughes. 1976. Hormonale Stimulation der Biosynthese geschlechtsspezifischer Duftstoffe bei Borkenkafern . Zeitschrift fur Angewandte Entomologie 82:108-110.
- Harring, C. M., J. P. Vite, and P. R. Hughes. 1975. Ipsenol, der Populationslockstoff des krummzahnigen Tannenborkenkafers . Naturwissenschaften 62:488.
- Hughes, P. R. 1973a. Dendroctonus: production of pheromones and associated compounds in response to host monoterpenes. Unpublished dissertation, University of California, Davis.
- Hughes, P. R. 1973b. Dendroctonus: production of pheromones and associated compounds in response to host monoterpenes . Dissertation Abstracts 34B:1570.
- Hughes, P. R. 1973c. Dendroctonus: production of pheromones and related compounds in response to host monoterpenes . Zeitschrift fur Angewandte Entomologie 73:294-312.
- Hughes, P. R. 1973d. Effect of alpha-pinene exposure on transverbenol synthesis in Dendroctonus ponderosae Hopk . Naturwissenschaften 60:261-262.
- Hughes, P. R. 1975. Pheromones of Dendroctonus: origin of alpha-pinene oxidation products present in emergent adults . Journal of Insect Physiology 21:687-691.
- Hughes, P. R. 1976. Response of female southern pine beetles to aggregation pheromone frontal in . Zeitschrift fur Angewandte Entomologie 80:280-284.
- Hughes, P. R., and G. B. Pitman. 1970. A method for observing and recording the flight behavior of tethered bark beetles in response to chemical messengers . Boyce Thompson Institute for Plant Research, Contributions 24:329-336.
- Hughes, P. R., and J. A. A. Renwick. 1977a. Hormonal and host factors stimulating pheromone synthesis in female western pine beetles Dendroctonus brevicomis . Physiological Entomology 2:289-292.
- Hughes, P. R., and J. A. A. Renwick. 1977b. Neural and hormonal control of pheromone biosynthesis in the bark beetle, Ips paraconfusus . Physiological Entomology 2:117-123.
- Hughes, P. R., J. A. A. Renwick, and J. P. Vite. 1976. The identification and field bioassay of chemical attractants in the roundheaded pine beetle . Environmental Entomology 5:1165-1168.
- Renwick, J. A. A., and P. R. Hughes. 1975. Oxidation of unsaturated cyclic hydrocarbons by Dendroctonus frontalis . Insect Biochemistry 5:459-463.
- Renwick, J. A. A., P. R. Hughes, and I. S. Krull. 1976. Selective production of cis- and trans-verbenol from (-)- and (+)- alpha-pinene by a bark beetle . Science 191:199-201.
- Renwick, J. A. A., P. R. Hughes, G. B. Pitman, and J. P. Vite. 1976. Oxidation products of terpenes identified from Dendroctonus and Ips bark beetles . Journal of Insect Physiology 22:725-727.
- Renwick, J. A. A., P. R. Hughes, and D. Tanletin. 1973. Oxidation products of pinene in the bark beetle, Dendroctonus frontalis . Journal of Insect Physiology 19:1735-1740.
- Renwick, J. A. A., P. R. Hughes, and J. P. Vite. 1975. The aggregation pheromone system of a Dendroctonus bark beetle in Guatemala . Journal of Insect Physiology 21:1097-1100.
- Vite, J. P., A. Bakke, and P. R. Hughes. 1974. Ein populationslockstoff des zwolfzahnigen Kiefernborkenkafers Ips sexdentatus . Naturwissenschaften 61:365-366.
- Vite, J. P., F. I. S., J. A. A. Renwick, P. R. Hughes, and R. A. Kliefoth. 1974. Biochemical and biological variation of southern pine beetle populations in North and Central America . Zeitschrift fur Angewandte Entomologie 75:422-435.
- Vite, J. P., R. Luhl, P. R. Hughes, and J. A. A. Renwick. 1975. Pine beetles of the genus Dendroctonus:pest populations in Central America. FAO Plant Protection Bulletin 23(6): 178-184, illust.
- Wood, D. L., L. E. Browne, B. Ewing, K. Lindahl, W. D. Bedard, P. E. Tilden, K. Mori, G. B. Pitman, and P. R. Hughes. 1976. Western pine beetle: specificity among enantiomers of male and female components of an attractant pheromone . Science 192:896-898.