Stochastic Dynamic Northern Corn Rootworm Population Model

A complete life cycle model for northern corn rootworm, Diabrotica barberi Smith and Lawrence, is developed using a published single-season model of adult population dynamics and data from field experiments. Temperature-dependent development and age-dependent advancement determine adult population dynamics and oviposition, while a simple stochastic hatch and density-dependent larval survival model determine adult emergence. Dispersal is not modeled. To evaluate the long-run perform nce of the model, stochastically generated daily air and soil temperatures are used for 100-year simulations for a variety of corn planting and flowering dates in Ithaca, NY, and Brookings, SD. Once the model is corrected for a bias in oviposition, model predictions for both locations are consistent with anecdotal field data. Extinctions still occur, but these may be consistent with northern corn rootworm metapopulation dynamics.


Issue Date:
2000
Publication Type:
Working or Discussion Paper
PURL Identifier:
http://purl.umn.edu/18381
Total Pages:
31
Series Statement:
CARD Working Paper 00-WP 235




 Record created 2017-04-01, last modified 2017-08-22

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