Details

Common Name
Bindweed, wild morning-glory
Botanic Name
Convolvulus arvensis
Plant Family
Convolvulaceae (Morning-glory family)
Habitat
Disturbed soils of roadsides, cultivated fields and pastures.
Distribution
Throughout North America.
Animals Affected
Horses
Bindweed - Convolvulus arvensis
Toxic Principle
Tropane alkaloids (pseudotropine) with atropine like activity on the autonomic nervous system. The alkaloids are present in all parts of the plant. The seeds are especially toxic.
Description
Bindweed is an extremely persistent, invasive, perennial, noxious weed. It is a twining or creeping weed with alternate leaves, and white or pink funnel shaped flowers. The plant reproduces readily from seed and its extensive deep root system.
Gastrointestinal
Colic due to intestinal stasis and accumulation of gas.
Treatment
There is no specific treatment for bindweed poisoning.
Diagnostic Tests
There are no specific means of diagnosing bindweed toxicity other than finding the plant has been eaten by the animal.
Special Notes
There is circumstantial evidence that horses eating bindweed over many weeks may develop a syndrome of chronic colic and weight loss attributable to intestinal fibrosis. References: 1.Todd FG, Stermitz FE, Schultheiss PC, Knight AP, Traub-Dargatz JL. Tropane alkaloids and toxicity of convolvulus arvensis (field bindweed). Phytochemistry, 39: 301-303, 1994. 2.Schultheiss PC, Traub-Dargatz JL, Knight AP, Appelhaus FM, Orton EC. Intestinal fibrosis and vascular remodelling in 10 horses and 2 ponies. J Vet Diagnostic Investigation, 7: 575-578, 1995. 3.Schultheiss PC, Knight AP, Traub-Dargatz JL, Todd FG, Stermitz FR. Toxicity of feild bindweed (Convolvulus arvensis) to mice. Vet Human Toxicol 37: 452-454, 1995.
Bindweed flowers (pink variety)
Bindweed in lawn
Bind weed seed capsules in hay sample.