Revised June 2007
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Contents
Summer annual broadleaf
Biennial broadleaf
Perennial broadleaf
Summer annual grass
Winter annual grass
Perennial grass
Plants resembling grasses
Herbicides
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Practical Weed Science for the Field Scout: Corn and Soybean
Summer annual broadleaf
A summer annual pigweed of agricultural crops. Seedlings have egg-shaped cotyledons, much more so than other pigweeds. First true leaves are lance shaped, without hairs, and have a glossy appearance. Mature plants range from 4 inches to 12 feet in height and have long and narrow leaves (lance-shaped) that are also waxy or glossy in appearance. Waterhemp stems are also hairless, similar to palmer amaranth but unlike redroot and smooth pigweed and Powell amaranth. Seedheads of male waterhemp are generally more compact than female waterhemp seedheads, which have a more open habit.
IPM1007, revised June 2007