CAHNRS – Department of Entomology

Dr. William Snyder's Lab


Professional Experience


  • Ph. D. University of Kentucky, Entomology, May 1999
  • M. S. Clemson University, Zoology (Ecology), August 1995
  • B. A. University of Delaware, Biology, January 1992



Crowder, DS, TD Northfield, MR Strand, and WE Snyder. 2010. Organic agriculture promotes evenness and natural pest control. Nature 466:109-112.

Northfield, TD, GB Snyder, AR Ives and WE Snyder. 2010. Niche saturation reveals resource partitioning among consumers. Ecology Letters 13: 338-348.


WE Snyder  2009. Coccinellids in diverse communities: which niche fits? Invited contribution to a special issue on lady beetle ecology. Biological Control, in press.

WE Snyder, Ramirez, RA and. 2009. Scared sick? Predator-pathogen facilitation enhances the exploitation of a shared resource. Ecology, in press.

Henderson, DR, E Riga, RA Ramirez, J Wilson and WE Snyder. 2009. Mustard biofumigation disrupts biocontrol by Steinernema spp. nematodes in the soil. Biological Control 48:316-322.

Ramirez, RA, DR Henderson, E Riga, LA Lacey and WE Snyder. 2009. Harmful effects of mustard bio-fumigants on entomopathogenic nematodes. Biological Control 48:147-154.

Eigenbrode, SD, WE Snyder, G Clevenger, H Ding, and SN Gorb. 2009. Variable attachment to plant surface waxes by predatory insects. In: Functional Surfaces in Biology (Ed. SN Gorb). Springer, New York. In press.


Finke, DL and WE Snyder. 2008. Niche partitioning increases resource exploitation by diverse communities. Science 321:1488-1490. press release

Straub, CS and WE Snyder. 2008. Increasing enemy biodiversity strengthens herbivore suppression on two plant species. Ecology 89:1605-1615.

Straub, CS, DL Finke and WE Snyder. 2008. Are the conservation of natural enemy biodiversity and biological control compatible goals? (Invited contribution to special issue on conservation biological control). Biological Control 45:225-237.

Snyder, GB, DL Finke and WE Snyder. 2008. Predator biodiversity strengthens herbivore suppression in single and multiple prey communities. Biological Control 44:52-60.

Chang, GC and WE Snyder. 2008. Pymetrozine causes a nontarget pest, the Colorado potato beetle (Coleoptera: Chrysomelidae), to leave potato plants. Journal of Economic Entomology 101:74-80.

WE Snyder and AR Ives. 2008. Behavior influences whether intra-guild predation disrupts herbivore suppression by parasitoids. In: Behavioral Ecology of Insect Parasitoids (Eds. E Wajnberg, C Bernstein & J van Alphen). Blackwell Press, Oxford, UK, pp. 71-91.

WE Snyder and AR Ives. 2008. Population dynamics and species interactions. For: Integrated Pest Management (Eds. EB Radcliffe and WD Hutchison). Cambridge University Press, Cambridge, UK. In press.


Prischmann, DA, DG James, CP Storm, LC Wright and WE Snyder. 2007. Identity, abundance, and phenology of Anagrus spp. (Hymenoptera: Mymaridae) associated with grape, blackberry and rose in Washington State. Annals of the Entomological Society of America. 100:41-52.


WE Snyder and EW Evans. 2006. Ecological effects of invasive, arthropod generalist predators. Annual Review of Ecology Evolution and Systematics 37:95-122. please email me for a PDF reprint

RP Prasad and WE Snyder. 2006. Diverse trait-mediated indirect interactions in a multi-predator, multi-prey community. Ecology 87:1131-1137. PDF

RP Prasad and WE Snyder. 2006. Polyphagy complicates conservation biological control that targets generalist predators. Journal of Applied Ecology 43:343-352. please email me for a PDF reprint

CS Straub and WE Snyder. 2006. Species identity dominates the relationship between predator biodiversity and herbivore suppression. Ecology 82:277-282. PDF

CS Straub and WE Snyder. 2006. Experimental approaches to understanding the relationship between predator biodiversity and biological control. In: Progress in Biological Control: Trophic and Guild Interactions in Biological Control (Eds. G. Boivin and J. Brodeur), pp. 221-239. Springer, New York.

Prischmann, DA, DG James, LC Wright, and WE Snyder. 2006. Effects of generalist phytoseiid mites and grapevine canopy structure on spider mite (Acari: Tetranychidae) biocontrol. Environmental Entomology 35:56-67.

WE Snyder, GB Snyder, DL Finke and CS Straub. 2006. Predator biodiversity strengthens herbivore suppression. Ecology Letters 9:789-796. please email me for a PDF reprint


Prischmann, DA, DG James, LC Wright, RD Teneyck and WE Snyder. 2005. Effects of chlorpyriphos and sulfur on spider mites and their natural enemies. Biological Control 33:324-334.

Koss, AM, AS Jensen, A Schreiber, KS Pike and WE Snyder. 2005. A comparison of predator and pest communities in Washington potato fields treated with broad-spectrum, selective or organic insecticides. Environmental Entomology 34:87-95. PDF

Ives, AR, BJ Cardinale and WE Snyder. 2005. A synthesis of subdisciplines: predator-prey interactions, and biodiversity and ecosystem functioning. Ecology Letters 8:102-116. PDF

Koss, AM and WE Snyder. 2005. Alternative prey disrupts biocontrol by a guild of generalist predators. Biological Control 32:243-251. PDF

WE Snyder, GC Chang and RP Prasad. 2005. Biodiversity and successful conservation biological control: is there a relationship? In: Ecology of Predator-Prey Interactions (eds. P. Barbosa & I. Castellanos), pp. 324-343. Oxford University Press, London.

Prischmann, DA, DG James and WE Snyder. 2005. Impact of management intensity on mites (Acari: Tetranychidae, Phytoseiidae) in Southcentral Washington wine grapes. International Journal of Acarology 31:277-288.

Prischmann, DA, DG James, SN Gingras and WE Snyder. 2005. Diversity and abundance of insects and spiders on managed and unmanaged grapevines in southcentral Washington State. Pan-Pacific Entomologist 81:131-144.

WE Snyder and CS Straub. 2005. Exploring the relationship among predator diversity, intraguild predation, and effective biological control. Proceedings of the Second International Symposium on Biological Control of Arthropods 1:472-479.


WE Snyder, GM Clevenger and SD Eigenbrode. 2004. Intraguild predation and successful invasion by introduced ladybird beetles. Oecologia 140:559-565. PDF

Chang, GC and WE Snyder. 2004. The relationship between predator density, community composition, and field predation on Colorado potato beetle eggs. Biological Control 31:453-461. PDF

Prasad, RP and WE Snyder. 2004. Predator interference limits fly egg biological control by a guild of ground-active beetles. Biological Control 31:428-437. PDF

WE Snyder and GM Clevenger. 2004. Negative dietary effects of Colorado potato beetle eggs for the larvae of native and introduced ladybird beetles. Biological Control 31:353-361. PDF

Koss, AM, GC Chang and WE Snyder. 2004. Predation of green peach aphids by generalist predators in the presence of alternative, Colorado potato beetle egg prey. Biological Control 31:237-244. PDF

WE Snyder, SN Ballard, S Yang, GM Clevenger, TD Miller, JJ Ahn, TD Hatten and AA Berryman. 2004. Complementary biocontrol of aphids by the ladybird beetle Harmonia axyridis and the parasitoid Aphelinus asychis on glasshouse roses. Biological Control 30:229-235. PDF

Demmon, AS, HJ Nelson, PJ Ryan, AR Ives and WE Snyder. 2004. The parasitoid Aphidius ervi (Hymenoptera: Braconidae) increases its adult size by disrupting host wing development. Environmental Entomology 33:1523-1527.

2003 – 2000

WE Snyder and AR Ives. 2003. Interactions between specialist and generalist natural enemies: parasitoids, predators, and pea aphid biocontrol. Ecology 84:91-107. PDF

WE Snyder and AR Ives. 2001. Generalist predators disrupt biological control by a specialist parasitoid. Ecology 82:705-716. PDF

WE Snyder and DH Wise. 2001. Contrasting trophic cascades generated by a community of generalist predators. Ecology 82:1571-1583. PDF

JL Williams, WE Snyder and DH Wise. 2001. Sex-based differences in antipredator behavior in the spotted cucumber beetle (Coleoptera: Chrysomelidae). Environmental Entomology 30:327-332.

WE Snyder, SB Joseph, RF Preziosi, and AJ Moore. 2000. Nutritional benefits of cannibalism for the ladybird beetle Harmonia axyridis when prey quality is poor. Environmental Entomology 29:1173-1179. PDF

WE Snyder and DH Wise. 2000. Antipredator behavior of spotted cucumber beetles in response to predators that pose varying risks. Environmental Entomology 29: 35-42. PDF

1999 and earlier

WE Snyder, DW Tonkyn, and DA Kluepfel. 1999. Transmission of a genetically engineered rhizobacterium by grasshoppers in the laboratory and in the field. Ecological Applications 9: 245-253.

WE Snyder and DH Wise. 1999. Predator interference and the establishment of generalist predator populations for biocontrol. Biological Control 15: 283-292. PDF

WE Snyder, DW Tonkyn, and DA Kluepfel. 1999. Transmission of a genetically engineered rhizobacterium by grasshoppers in the laboratory and in the field. Ecological Applications 9: 245-253.

Preziosi, RF, WE Snyder, CP Grill, and AJ Moore. 1999. The fitness of manipulating phenotypes: Implications for studies of fluctuating asymmetry and multivariate selection. Evolution 53: 1312-1318.

Joseph, SB, WE Snyder and AJ Moore. 1999. Larvae of the ladybug Harmonia axyridis use endogenous cues to avoid cannibalizing relatives. Journal of Evolutionary Biology 12: 792-797.

Wise, DH, WE Snyder, P Tuntibunpakul and J Halaj. 1999. Spiders in decomposition food webs of agroecosystems: theory and evidence. Journal of Arachnology 27: 363-370.

WE Snyder, DW Tonkyn, and DA Kluepfel. 1998. Insect mediated dispersal of the rhizobacterium Pseudomonas chlororaphis. Phytopathology 88: 1248-1254.

Platt, SG, and WE Snyder. 1995. Nine-banded armadillo, Dasypus novemcinctus (Mammalia: Edentata), in South Carolina: additional records and reevaluation of status. Brimleyana 23:89-93. PDF

WE Snyder, and LE Hurd. 1995. Egg hatch phenology and intraguild predation between two mantid species. Oecologia104: 496-500.

Hurd, LE, RM Eisenberg,WF Fagan, KJ Tilmon, WE Snyder, KS Vandersall, SG Datz, and JD Welch.1994. Cannibalism reverses male-biased sex ratio in adult mantids: female strategy against food limitation? Oikos 69: 193-198.
RM Eisenberg, LE Hurd, WF Fagan, KJ Tilmon, WE Snyder, KS Vandersall, SG Datz, and JD Welch. 1992. Adult dispersal of Tenodera aridifolia sinensis (Mantodea: Mantidae). Environmental Entomology 21: 350-353.

Department of Entomology
Washington State University
Pullman, WA 99164-6382
Office: FSHN 264
Phone: 509-335-3724

Dr. William Snyder's Lab, Washington State University, Pullman WA 99164-6382, 509-335-5422, Contact Us
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