Weed Management

Information on weed management of turfgrass to control weeds such as wild carrot, yellow woodsorrel, wild onions, shepherd’s purse, knotweed, bedstraw, thistle, yellow nutsedge and multiflora rose. Tips on identifying weeds and using pesticides.

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Photo: Ohio State Weed Lab, The Ohio State University, Bugwood.org common mallow (Malva neglecta)
Landscape Management: Common Mallow - News News
Considered a weed in turfgrass and landscape beds, common mallow is an interesting plant in that it can be an annual or biennial. More
Epipactis helleborine. Photo: Amy Korman, Penn State
Be on the Lookout for Invasive Orchids - News News
Epipactis helleborine, the Broad-leaved Helleborine, is an invasive orchid that continues to plague Pennsylvania landscapes. More
Zenik Crespo (back, right) assists Hispanic participants as they identify weeds at Johnston’s Everygreen Nursery in Erie. Photo: L. Follett, Johnston’s Evergreen Nursery
Bilingual Workshops Teach Integrated Weed Management - Articles Articles
Penn State Extension has developed new resources for weed management and is beginning to offer bilingual training opportunities. More
Which Pesticide License Does Your Business Need?
Which Pesticide License Does Your Business Need? - Articles Articles
In Pennsylvania, Green Industry professionals who use pesticides need to understand the Pennsylvania pesticide laws and how to comply with them. More
Ruth Benner, Penn State University
Weed Identification Walk - Workshops Workshops

Weed Identification Walk

07/25/2018

Erie, PA

$15.00
Join us for a hands-on, interactive session to learn about identifying and managing a variety of broadleaf and grassy weeds in both turf and landscape situations. More
Crabgrass infested lawn. Photo: P. Landschoot, Penn State
Postemergence Control of Crabgrass and Other Summer Annual Grasses in Lawns - Articles Articles
During rainy summers, annual grasses can be an unsightly weed problem in many Pennsylvania lawns. More
Queen Anne’s Lace is commonly found along roadsides
Is It a Weed? - Articles Articles

Is It a Weed?

Tom Butzler

Controlling weeds is important in landscape beds. They appear unsightly and compete with the desirable plants for light, nutrients, moisture. More
Organic Land Care Best Management Practices Manual
Organic Land Care Best Management Practices Manual - Articles Articles
This free manual provides recommendations to land managers and landscape contractors on best management practices for effectively conducting organic land care. More
Photo: Chris Evans, University of Illinois, Bugwood.org, Queen Anne's lace, wild carrot, Daucus carota
Wild Carrot or Queen Anne’s Lace - Articles Articles
Wild carrot or Queen Anne’s lace (Daucus carota) is a biennial. More
Grape leaves exhibiting phenoxy-type herbicide damage in 2017. Photo: T. Delvalle, Penn State
Herbicide Drift and Drift Related Damage - Articles Articles
Pesticide applicators are responsible for drift related damage and could face a potential lawsuit. More
Calibration How Tos: How to Calibrate Your Rotary Spreader
Calibration How Tos: How to Calibrate Your Rotary Spreader - Videos Videos
The video shows you how to calibrate your rotary spreader. More
Photo: James H. Miller & Ted Bodner, Southern Weed Science Society, Bugwood.org
Yellow Woodsorrel - Articles Articles

Yellow Woodsorrel

Tim Abbey

Yellow woodsorrel (Oxalis stricta) has foliage (composed of three leaflets) that resembles white clover or black medic. More
Photo: John D. Byrd; Mississippi State University, Bugwood.org
Yellow rocket - Articles Articles

Yellow rocket

Tim Abbey

Not all weeds get a “cool” common name, but yellow rocket (Barbarea vulgaris) is one of them. More
Photo: Ohio State Weed Lab Archive, The Ohio State University, Bugwood.org, wild garlic,Allium vineale
Wild Onion and Wild Garlic - Articles Articles
Wild garlic (Allium vineale) and onion (Allium canadense) are perennial plants that can be a weed in turfgrass and landscape beds. More
Spurge infestation in relation to mowing height. Far left is mowed at 1 inch, middle at 1.75 inches, right at 2.5 inches. Photo: Dr. Pete Landschoot, Penn State
The Impact of Mowing on Weed Pressure - Articles Articles
Perhaps the single most important (and easiest) management tool to control weeds in turf is performing proper mowing practices. More
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