Weeds and Their Control: Prickly Lettuce (Lactuca serriola)
Karen An annual or biennial, prickly lettuce is a native of Eurasia but found throughout the United States. It prefers a sunny site with mesic to dry soil, and is especially…
Weeds and Their Control: Spiny Sowthistle (Sonchus asper)
A native of Europe, spiny sow thistle is a common annual weed throughout the United States. It thrives in sun and can be found in gardens, lawns, pastures, and waste…
Weeds and Their Control: Common Vetch (Vicia sativa)
Common vetch is climbing annual vine brought to North American from southern Europe as a covercrop but has since escaped and become a troublesome weed in shrub and perennial beds…
Weeds and Their Control: Horseweed (Conyza canadensis)
Also known has Canadian Fleabane, Coltstail, Marestail and Butterweed, horseweed is found throughout to North and Central America where it grows along road sides, and in waste areas, meadows, fields,…
Weeds and Their Control: Common Cinquefoil (Potentilla simplex)
Common cinquefoil, also known as oldfield cinquefoil, is a low growing perennial that resembles a strawberry plant with yellow flowers. It is native to tall grass prairies but is now…
Weeds and Their Control: Poison Hemlock (Conium maculatum)
The name “poison hemlock” conjures up visions of Socrates drinking his fatal brew as shown by the French painter Jacques-Louis David. A brew containing poison hemlock was given to condemned…
Interesting Facts about Spider Mites as an Aid in Control
Spider mites can be serious pests of garden and greenhouse plants including trees, shrubs, vegetables and ornamental plants. The leaves of plants infected with spider mites first show small white…
Differences between Powdery Mildew and Downy Mildew
Mildews that cause diseases in plants are of two different types, powdery and downy. Although they have similar names they are distinctly different and have different symptoms and control measures.…
Interesting Facts about Whiteflies as an Aid in Control
White flies are tiny white insects that collect on the undersides of leaves. They come a great masses forming a white cloud around a plant, and produce a sticky honeydew…
Interesting Facts about Rusts Affecting Garden Plants as an Aid to Control
Rusts are considered one of the most harmful diseases of plants. They are caused by fungi that can infect the leaves, stems, fruits, or seeds of plants, producing pustules on…