Christian Che-Castaldo

Graduate Student (PhD Candidate)


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I am studying the relationship between herbivory and primary succession on Mt. St. Helen's 'Pumice Plain.' Specifically, I am examining how stem-boring insect herbivory by weevils (Cryptorhynchus lapathi) and sesiid moths (Paranthrene robiniae) and elk herbivory (Cervus elaphus) interact with plant tolerance and resistance to affect nutrient cycling and the pace and pattern of Sitka willow (Salix sitchensis) recolonization.

Research Location

Mount St. Helens National Volcanic Monument, WA

Publications *

  • Andrei A., G. Dively, M. Patterson, C. Castaldo, D. Rogers, M. Mahoney, J. Wollam. 2007. Resistance and cross-resistance to imidacloprid and thiamethoxam in the Colorado potato beetle Leptinotarsa decemlineata. Pest Management Science. 63(1): 32-41.
  • Fernandez-Cornejo, J. and C. Castaldo. 1998. The diffusion of IPM Techniques among fruit growers in the USA. Journal of Production Agriculture. 2(4): 497-505.

Chris in the field C. lapathi


  • Darwin Fellowship, BEES Program

Previous Education

From the gallery

Herbivore-exclusion Fence.  This fence makes elk run away (hopefully). Elk near study plots on Mount St. Helens setting up fencepost grids Mount St. Helens sesiid moth borer Paranthrene robiniae P input on pumice plain
Cryptorhynchus lapathi eat stems! Cryptorhynchus lapathi larva Cryptorhynchus lapathi pupa Cryptorhynchus lapathi adult Cryptorhynchus lapathi adult willow riparian area