01642naa a2200205 a 450000100080000000500110000800800410001910000170006024500960007726000090017352010650018265000130124765000120126065000110127265000200128370000170130370000170132070000200133777300790135712796802025-02-21       1987    bl uuuu     u00u1 u    #d1 aRAWAT, J. K.  aA pest and timber management modelbjack pine budworm and jack pine.h[electronic resource]  c1987  aA simple illustrative mathematical model for integrating forest pest control decisions with timber management is developed for a hypothetical jack pine forest infested with jack pine budworm. Subject to several assumptions made in the model, optimal quantities and timings of pesticide application and optimal rotation ages of the forest are determined under various sets of parameters such as cost of pesticide, stumpage price, pest population growth rate and age of the forest at the time of pest infestation. The sensitivities of the optimal values to these parameters are examined. In general, the rotation age and hence harvesting schedule is affected under different pest situations, site conditions and economic parameters. In addition, immediate pest control action following noticeable pest infestation in young crops may not always be the most profitable decision, particularly when only one pesticide application is permitted and when net return expected from a crop is low. These findings have implications for effective pest and timber management.  aFloresta  aMadeira  aManejo  aPraga de Planta1 aBELLI, K. L.1 aSMITH, S. M.1 aNAUTIYAL, J. C.  tCanadian Journal of Agricultural Economicsgv. 35, n. 2, p. 441-446, 1987.