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Weeds
PSU County Extension Offices - To make sure you know exactly what your problem pest is, take samples to your local extension office for free ID! Also get gardening tips/handouts, and expert advice.
Virginia Tech Weed ID Guide - Online listing of weeds by common name, includes photos & descriptions.
Weeds and Your Garden - Prevention and control tactics, from NY IPM
Integrating Non-Chemical Weed Controls Into Your System - Description of different methods of weed control for vegetable gardeners, from UConn IPM
Contribution of Cover Crop Mulches to Weed Management - From UConn IPM
Poison Ivy Myths & Facts - Written by Bill Einsig
Invasive Plants in Pennsylvania - Information from DCNR including what you can do and a species list with distribution. (look along right side of web page for menu bar)
Landscaping with Native Plants in PA - Web site from DCNR with tips on how to go native and listings of recommended plant species.
Landscape Weed Control (PDF) - From National Coalition for Alternatives to Pesticides
Weed Control in Vegetable Gardens - NC State University fact sheet
Flaming for Weed Control - Using a propane burner to burn/boil weeds, from UConn IPM
Also see Companion Planting, Cover Crops, and Mulch below.