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Hochwender, C. G. E. M. Janson, D. H. Cha and R. S. Fritz. In press. Community structure of insect herbivores in a hybrid system: Examining the effects of browsing damage and plant genetic variation. Ecological Entomology

Fritz, R.S., and C.G. Hochwender.  In press.  Cascading effects of plant genetic variation on herbivore communities. CAB International, Nosworthy Way, Wallingford, Oxfordshire OX10 8DE, UK.

2004

Czesak, M. E., M. J. Knee, R. G. Gale, S. D. Bodach, and R. S. Fritz. 2004. Genetic architecture of resistance to aphids and mites in a hybrid system of willows. Heredity 93:619-626.

Hochwender, C.G., and R.S. Fritz.  2004.  Plant genetic differences influence herbivore community structure: evidence from a hybrid willow system.  Oecologia 138: 547-557.

Albrectsen, B.R., H. Gardfjell, C.M. Orians, B. Murray and R.S. Fritz. 2004. Slugs, willow seedlings and nutrient fertilization: intrinsic vigor inversely affects palatability. Oikos 105: 268-278.

2003

Fritz, R. S., B. A. Crabb, C. G. Hochwender.  2003. Preference and performance of a gall-inducing sawfly: Plant vigor, sex, gall traits and phenology. Oikos 102: 601-613.

Orians, C. M., S. Lower,  R. S. Fritz, and B. M. Roche. 2003. The effects of plant genetic variation and soil nutrients on secondary chemistry and growth in a shrubby willow,  Salix sericea: patterns and constraints on the evolution of resistance traits. Biochemical Systematics and Ecology 31: 233-247.

Fritz, R.S., C.G. Hochwender, S.J. Brunsfeld and B.M. Roche.  2003.  Genetic architecture of susceptibility to herbivores in hybrid willows.  Journal of Evolutionary Biology 16:1115-1126 .

2001

Fritz, R. S. 2001. Plant hybridization and biodiversity. Encyclopedia of Biodiversity 4:659-675. Academic Press.

Fritz, R.S., C.G. Hochwender, D. Lewkiewicz, S. Bothwell, and C.M. Orians. 2001. Seedling herbivory by slugs in a willow hybrid system: developmental changes in damage, chemical defense, and plant performance. Oecologia 129 87-97.

2000

Hardig, T. M., S. J. Brunsfeld, R. S. Fritz, M. Morgan, and C. M. Orians. 2000. Morphological and molecular evidence for hybridization and introgression in a willow (Salix) hybrid zone. Molecular Ecology 9: 9-24.

Fritz, R. S., B. A. Crabb, and C. G. Hochwender. 2000. Preference and performance of a gall-forming sawfly: I.  A test of the plant vigor hypothesis. Oikos 89:555-563.

Hochwender, C.G., R.S. Fritz, and C.M. Orians.  2000.  Using hybrid systems to explore the evolution of tolerance to damage.  Evolutionary Ecology 14:509-521.

1999

Fritz, R. S. 1999. Resistance of hybrid plants to herbivores: Genes, environment, or both? Ecology 80: 382-391.

Hochwender, C. G. and R. S. Fritz. 1999. Fluctuating asymmetry in a Salix hybrid system:  The importance of genetic versus environmental causes. Evolution 53:408-416.

Fritz, R. S., C. Moulia, and G. Newcombe. 1999. Resistance of hybrid plants and animals to herbivores, pathogens, and parasites. Annual Review of Ecology and Systematics 30:565-591.

Orians, C. M., D. I. Bolnick, B. M. Roche, R. S. Fritz, and T. Floyd. 1999. Water availability alters the relative performance of Salix sericea, Salix, eriocephala, and their F₁ hybrids. Canadian Journal of Botany 77:514-522.

1998

Roche, B. M. and R. S. Fritz. 1998 The effects of host plant hybridization on resistance to willow leaf rust, Melampsora. European Journal of Forest Pathology 28:259-270.

Fritz, R. S., B. M. Roche, S. J. Brunsfeld. 1998. Genetic variation in herbivore resistance of hybrid willows.  Oikos 83:117-128.

1997

Fritz, R. S., S. E. McDonough, and A. G. Rhoads.  1997. Effects of plant hybridization on herbivore-parasitoid interactions.  Oecologia 110: 360-367.

Orians, C. M., C. Huang, A. Wild, P. Zee, M. T. T. Dao, and R. S. Fritz. 1997. Causes of variable beetle responses to hybrid willows.  Entomologia Experimentalis et Applicata 83:285-294.

Roche, B. M. and R. S. Fritz. 1997.  Genetics of resistance of Salix sericea to a diverse community of herbivores.  Evolution. 51:1490-1498.

1996

Fritz, R. S., B. M. Roche, and C. M. Orians. 1996. Resistance of hybrid and parental willows to herbivores:  Hypotheses and variable herbivore responses over three years. Pages 132-141. in W. J. Mattson, P. Niemela, and M. Rousi (eds.).  General Technical Report, USDA North Central Forest Experiment Station, St. Paul, MN.

Orians, C. M. and R. S. Fritz.  1996. Genetic and soil nutrient effects on the abundance of herbivores on willow. Oecologia 105: 388-396.

Fritz, R. S., B. M. Roche, S. J. Brunsfeld, and C. M. Orians. 1996. Interspecific and temporal variation in herbivore responses to hybrid willows. Oecologia 108:121-129.

Smith, D. R. and R. S. Fritz. 1996.  Review of the Eastern North American species of the leaf-folding sawflies of the genus Phyllocolpa Benson (Hymenoptera: Tenthredinidae). Proc. Entomol. Soc. Wash. 98:695-707.

Fritz, R. S., Johansson, L., M. Ramstedt, B.Åstrom, and H. Häggström.  1996.  Susceptibility of pure and hybrid willows to pathotypes of Melampsora epitea. European Journal of Plant Pathology  102: 875-881.

Orians, C. M., B. M. Roche, and R. S. Fritz. 1996.  The genetic basis for variation in the concentrations of phenolic glycosides in Salix sericea:  An analysis of heritability and genetic correlations. Biochemistry Systematics and Ecology 24:719-724.

1995

Fritz, R.S. 1995. Direct and indirect effects of plant variation on enemy impact. Ecological Entomology 20: 18-26.

Orians, C. M. and R. S. Fritz. 1995. Secondary chemistry of hybrid and parental willows:  Phenolic glycosides and condensed tannins in Salix sericea, S. eriocephala, and their hybrids. J. Chemical Ecology  21:1245-1253.

1994

Fritz, R. S., C. M. Nichols-Orians, and S. J. Brunsfeld. 1994. Interspecific hybridization of plants and resistance to herbivores:  Hypotheses, genetics, and variable responses in a diverse community.  Oecologia 97:106-117.

1993

Nichols-Orians, C. M., R. S. Fritz, and T. P. Clausen. 1993. The genetic basis for variation in the concentration of phenolic glycosides in Salix sericea: Clonal variation and sex-based differences.  Biochemical Systematics and Ecology 21:535-542.

Fritz, R. S. and S. R. Kaufman. 1993. Variable enemy impact at three scales: herbivore species, plant species, and plant genotype. Oikos 68: 463-472.

1992

Fritz, R. S. and E. L. Simms (editors).  1992.  Plant Resistance to Herbivores and Pathogens: Ecology, Evolution, and Genetics. The University of Chicago Press, Chicago.

Fritz. R. S. 1992. Community structure and species interactions of phytophagous insects on resistant and susceptible host plants. Pages 240-277  in R. S. Fritz and E. L. Simms (editors). Plant Resistance to Herbivores and Pathogens: Ecology, Evolution, and Genetics. The University of Chicago Press, Chicago.

Fritz, R. S. and E. L. Simms. 1992. Ecological genetics of plant-phytophage interactions. Pages 1-9  in R. S. Fritz and E. L. Simms (editors). Plant Resistance to Herbivores and Pathogens: Ecology, Evolution, and Genetics. The University of Chicago Press, Chicago.

Fritz, R. S. 1992. Natural enemy impact varies with host plant genotype.  Pages 367-369. in  S. B. J. Menken, J. H. Visser, and P. Harrewijn (eds.) Proc. 8th Int. Symp. Insect-Plant Relationships, Dordrecht: Kluwer Acad. Publ.

Nichols-Orians, C. M., T. P. Clausen, R. S. Fritz, P. B. Reichardt, and J. Wu. 1992. A new phenolic glycoside isolated from Salix sericea Marshall. Phytochemistry 31:2180-2181.

1990

Fritz, R. S. and J. Nobel. 1990. Host plant variation in mortality of the leaf-folding sawfly on the arroyo willow. Ecological Entomology 15:25-35.

Fritz, R. S. and P. W. Price. 1990. A  field test of interspecific competition on oviposition of gall-forming sawfly species on willow.  Ecology 71:99-106.

Fritz, R. S. 1990. Effects of genetic and environmental variation on resistance of willow to sawflies.  Oecologia  82: 325-332.

Fritz, R. S. 1990.  Variable competition between insect herbivores on genetically variable host plants.  Ecology 71: 1208-1211.

Simms, E. L. and R. S. Fritz.  1990. The ecology and evolution of host-plant resistance to insects.  Trends in Ecology and Evolution 5:356-360.

1989

Morse, D. H. and R. S. Fritz. 1989. Milkweed pollinia and predation risk to flower-visiting insects by the crab spider Misumena vatia.  American Midland Naturalist 121:188-193.

Fritz, R. S. and J. Nobel. 1989. Plant resistance, plant traits, and host plant choice of the leaf-folding sawfly on the arroyo willow.  Ecological Entomology  14:393-401.

1988

Fritz, R. S. and P. W. Price. 1988. Genetic variation among plants as a cause of community variation in phytophagous insects: willows and sawflies. Ecology 69:845-856.

1987

Morse, D. H. and R. S. Fritz. 1987. The consequences of foraging for reproductive success.  Pages 443-455. In Kamil, A., J. R. Krebs, and H. R. Pulliam (eds.). Foraging Behavior, Plenum Press.

Fritz, R. S., W. S. Gaud, C. F. Sacchi, and P. W. Price. 1987. Variation in herbivore density among plants and its consequences for community structure:  Field studies on willow sawflies.  Oecologia 72:577-588.

Fritz, R. S., W. S. Gaud, C. F. Sacchi, and P. W. Price.  1987. Patterns of intra- and interspecific association of gall-forming sawflies in relation to shoot size on their willow host plant. Oecologia 73:159-169.

1986

Price, P. W., M. Westoby, B. Rice, P. Atsatt, R. Fritz, J. N. Thompson, and C. Mobley 1986. Parasite mediation in ecological interactions. Annual Review of Ecology and Systematics 17:487-505.

Fritz, R. S., C. F. Sacchi, and P. W. Price. 1986. Competition versus host plant phenotype in species composition:  willow sawflies. Ecology 67:1608-1618.

1985

Fritz, R. S. and D. H. Morse. 1985. Reproductive success and foraging of the crab spider, Misumena vatia. Oecologia 65:194-200.

Fritz, R. S. 1985. Spruce grouse in habitat patches in the Adirondack Mountains:  Dispersal versus rarity. Auk 102: 393-394.

Morse, D. H. and R. S. Fritz. 1985. Variation in the pollinaria, anthers, and alar fissures of common milkweed (Asclepias syriaca L.).  American Journal of Botany 72:1032-1038.

1983

Fritz, R. S. 1983. Ant protection of a host plant's defoliator:  Consequence of an ant-membracid mutualism.  Ecology 64:789-797.

Fritz, R. S. 1983. Support of research on insects. Bulletin of the Entomological Society of America. 29:  29-31.

Morse, D. H. and R. S. Fritz. 1983. Contributions of diurnal and nocturnal insects to the pollination of common milkweed (Asclepias syriaca) in a pollen limited system. Oecologia 60:190-197.

Fritz, R. S. 1983. Patterns of mating, oviposition and egg production of the locust leafminer, Odontota dorsalis. Environmental Entomology 12:1841-1843.

1982

Fritz, R. S. 1982. Selection for host behavior modification by insect parasitoids. Evolution 36:283-288.

Fritz, R. S. 1982. An ant-treehopper mutualism:  effects of Formica subsericea on the survival of Vanduzea arquata. Ecological Entomology 7:267-276.

Fritz, R. S., N. E. Stamp, and T. G. Halverson. 1982. Iteroparity and semelparity in insects.  American Naturalist 120:264-268.

Gross, S. W. and R. S. Fritz. 1982. Differential stratification, movement and parasitism of sexes of the bagworm, Thyridopteryx ephemeraeformis (Haworth) on redcedar. Ecological Entomology 7:149-154.

Morse, D. H. and R. S. Fritz. 1982. Experimental and observational studies of patch choice at three scales by the crab spider Misumena vatia.  Ecology 63:172-182.

1981

Fritz, R. S. and D. H. Morse. 1981. Nectar parasitism of Asclepias syriaca by ants:  effects on nectar levels, pollinia insertion, pollinaria removal and pod production. Oecologia 50:316-319.

1980

Fritz, R. S. 1980. Consequences of insular population structure:  distribution and extinction of spruce grouse populations in the Adirondacks. Pages 757-763. In R. Nohring, ed. Proceedings of the 17th International Congress of Ornithology. Deutsche Ornithologen-Gessellschaft, Berlin.

1979

Fritz, R. S. 1979.  Consequences of insular population structure:  Distribution and extinction of spruce grouse populations. Oecologia 42:57-65.