Stochastic Dynamic Northern Corn Rootworm Population Model, January 2000

(2000) Stochastic Dynamic Northern Corn Rootworm Population Model, January 2000. Iowa State University


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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 performance 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.

Item Type: Departmental Report
Keywords: Corn planting, corn rootworm, Diabrotica barberi, metapopulation dynamics, northern corn rootworm, oviposition.
Subjects: Agriculture and food production > Crops
ID Code: 2863
Deposited By: Margaret Barr
Deposited On: 12 Oct 2005
Last Modified: 12 Oct 2005