User's Guide for GMPHEN: Gypsy Moth Phenology Model.

摘要

GMPHEN is a flexible, menu-driven computer model that uses daily temperatures and previously published data to predict the timing of gypsy moth and host development. The model simulates gypsy moth egg hatch, larval and pupal development, and budbreak and leaf expansion for six eastern hardwoods. At 1- to 10-day intervals (as selected by the user), GMPHEN reports the percentage of gypsy moths in each life stage, mean life stage, mean percent leaf expansion, and, for each host species, percent budbreak and leaf expansion. The guide contains instructions for using GMPHEN and presents examples of model simulations. The structure, assumptions, and default parameter values also are described.