Biology and Management
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|Redroot Pigweed Seedling
|Redroot Pigweed Flowers
|Redroot pigweed is a summer annual that
reproduces only by seed. Seeds are glossy black, rounded with convex sides. Seeds
are produced late summer through fall. Seeds germinate spring through summer. Mature
plants grow upright 2 to 3 feet tall. The lower stem and taproot are reddish colored.
Leaves are alternate and simple. Leaves are reddish-green with long petioles and
prominent veins. The flowers are green arranged in dense terminal clusters. This species
acts as a host for beet leafhopper that transmits the virus of curly top in beets. This
weed occurs throughout the west and is associated with cultivated soils, gardens, and
waste areas. It was introduced from tropical America and thrives in warm climates.
This section contains information on identification of
the different life stages of Redroot Pigweed. Select Biology and Management from the
Contents Menu for more information on the biology and management, or select Registered
Herbicides for the herbicides that are registered to control this weed in mint.