Livestock poisoning possible from wilting black cherry leaves

Storm-damaged wild cherry trees could pose threat to livestock grazing in pastures.

Thunderstorms that developed across west Michigan turned violent during the overnight hours of June 12, particularly in northeastern Van Buren County. High winds caused widespread damage to trees, homes and other structures. Several buildings lost portions of roofs. It does not appear that this strong thunderstorm caused widespread hail damage to crops. Extensive damage to power infrastructure may leave homes and businesses in the Gobles, Mich., and Kendall, Mich., area without power for some time.

As growers are out cleaning up storm damage, Michigan State University Extension advises livestock producers to be aware that some of the storm-damaged trees may pose a livestock poisoning risk. The leaves of wild black cherry trees, which are a very common fencerow and woodlot species in southwest Michigan, can cause a lethal poisoning risk if grazing animals consume wilted leaves. The toxic component in the leaves is prussic acid, a hydrogen cyanide toxin that is only formed when glycosides in the leaves are combined with hydrolytic enzymes. Under normal circumstances, the two components are stored in separate tissues, but can become poisonous in storm-damaged wilted cherry leaves.

Wild black cherry tree Wild black cherry tree
Black cherry tree. Photo credits: (Left) Jeff McMillian @ USDA-NRCS PLANTS Database. (Right) Patrick J. Alexander @ USDA-NRCS PLANTS Database.

Cattle Grazing: Summer Storms and Wild Cherry Trees,” written by Ohio State University Extension educator Rory Lewandowski and published at DairyHerd.com, states that as little as 1.2 to 4.8 pounds of wilted black cherry leaves could constitute a lethal dose for a 1,200 pound dairy cow. To protect grazing livestock, limbs with wilted leaves should be removed from pasture areas. Lewandowski recommends the animals be removed from the pastures until the damaged black cherry branches have been removed or the leaves become dried up and turn completely brown.

Read the full article for more information on the cyanic poisoning potential from wilted black cherry leaves.