Weeds and Their Control: Giant Foxtail Grass (Setaria faberi)
Karen Giant foxtail was introduced into North America from East Asia in the 1930s and is now a common weed in the eastern half of the United States especially in the…
Weeds and Their Control: Spanish Needles (Bidens bipinnata)
Spanish needles is a summer annual native to tropical America. It is found along most of the East coast, Midwest, South and west to California. Spanish needles prefers partial shade,…
Weeds and Their Control: Common Milkweed (Asclepias syriaca)
Common milkweed is native to most of the United States east of the Rocky Mountains. It prefers full sun, fertile soil, and mesic conditions but tolerates much less and can…
Weeds and Their Control: Tall Morning Glory (Ipomoea purpurea)
Tall morning glory is an annual vine native to Mexico and Central America. Introduced as an ornamental in the 1700s, it has naturalized in most of the United States except…
Weeds and Their Control: Johnson Grass (Sorghum halepense)
Considered one of the ten worst weeds in the world, Johnson grass is a perennial weed native to the Mediterranean region but growing throughout Europe, as well as in the…
Weeds and Their Control: Bermudagrass (Cynodon dactylon)
Bermudagrass is a perennial grass native to India and Africa and was introduced into North America in 1751. It is now found in most of the continental United States and…
Weeds and Their Control: Barnyard grass (Echinochloa crus-galli)
Barnyard grass is a summer annual native to tropical Asia but is widespread now in Europe as well as the United States. It grows in all states except Alaska and…
Weeds and Their Control: Poison Ivy (Toxicodendron radicans)
Poison ivy is a perennial native to eastern, and mid-western United States and is found in all U.S. states east of the Rocky Mountains. It grows well in shaded areas…
Weeds and Their Control: Quackgrass (Agropyron repens)
A rough looking cool weather perennial, quackgrass is a native of Europe, Asia and northwest Africa that was introduced into the United States for forage or as a contaminant in…
Weeds and Their Control: Common Sorrel (Rumex acetosella)
Common sorrel is a short-lived perennial weed also known as sheep sorrel and red sorrel. It is a native of Europe and Asia and probably came to America in the…