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About the application:

This is an modernize of the long-standing DD modeling platform at uspest.org, run by the Statewide IPM tool (the Integrated Plant Safety Center) at Oregon State University, built for the full USA and surrounding places. Choose a nearby weather station (by place name, zip code, station code, and optional Google map), one of over 100 models (or generic calculator), add a few options, and view output as a table and graph of degree-days. We help 6 types of long-term forecasts, a 6-7 day short term forecast, condensed or full table and interactive graph of degree-days and predicted phenological happenings, and a date comparison program that compares current degree-day accumulations with past years data (with an estimate of how a lot of days ahead or behind this year is). This tool has evolved for over 20 years to help agricultural decision making, and nearly all of the models are well-documented including original published scientific references and data used to construct the models. All models are driven solely by everyday maximum and minimum temperatures. Models contain pest insects and weeds, a lot of invasive insect species, some plant pathogens, some weed biological control agents, a lot of vegetable varieties, and some field crops. Some of the most famous models contain the generic degree-day calculator, codling moth, oriental fruit moth, Pandemis leafroller, fire blight infection risk, apple scab infection season, gypsy moth, orange tortrix, western cherry fruit fly, spotted wing Drosophila, and emerald ash borer. Be additional attentive when choosing and using weather stations and data - outages occur and data quality could be carefully checked for quality assurance (QA) warning tags. Be prepared to run models at multiple places to search consistency of results. Use at your own risk! Supported by OSU IPM, Western Region IPM center, USDA APHIS PPQ, and numerous USDA NIFA grant tools.