Weed Identification and Control

Information on weed identification and control, including catsear, marestail, purple loosestrife, pokeweed, pigweed, poison ivy, crabgrass, hemlock, purslane and multiflora rose. Tips on various herbicides and integrated pest management.

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Marestail (horseweed) in Rock Springs, PA (Annie Klodd)
Managing Herbicide Resistant Marestail (horseweed) - Videos Videos
Best management practices for resistant marestail (horseweed) More
Herbicide Resistant Marestail (horseweed) in Pennsylvania
Herbicide Resistant Marestail (horseweed) in Pennsylvania - Videos Videos
Marestail (horseweed) resistant to glyphosate and Group 2 herbicides is present in PA and presents management challenges. More
Harrington Seed Destructor
Harrington Seed Destructor - Videos Videos

Harrington Seed Destructor

Annie Klodd

2:44

Penn State is involved in research on Harvest Weed Seed Control for herbicide resistant weeds. Here, the HSD is described as it operates during harvest. More
Invasive Pigweeds: Palmer Amaranth and Waterhemp
Invasive Pigweeds: Palmer Amaranth and Waterhemp - Articles Articles

Invasive Pigweeds: Palmer Amaranth and Waterhemp

William S. Curran, Ph.D., Annie Klodd

Palmer amaranth is a species of pigweed that was recently introduced into PA and has been positively identified on more than 30 sites across the state. More