(2000) Stochastic Dynamic Northern Corn Rootworm Population Model, January 2000. Iowa State University
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|
|Deposited By:||Margaret Barr|
|Deposited On:||12 Oct 2005|
|Last Modified:||12 Oct 2005|