Effects of Poisonous Plants on Livestock by Richard F. Keeler, Kent R. Van Kampen and Lynn F. James

By Richard F. Keeler, Kent R. Van Kampen and Lynn F. James (Eds.)

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Intensively Grazed Sown Pasture In the temperate regions of Australia and in humid subtropical and tropical areas along the east coast, sown pastures mostly fertilized regularly are grazed intensively in small units, mainly by dairy cattle, wool sheep, mutton sheep, or fat lambs. Many of these pastures present special plant poisoning problems. g. variegated thistles (Silybum) and other thistles or plants that invade rundown and degraded old pasture, such as bracken {Pteridium), St. John's wort (Hypericum), ragwort {Senecio jacohaea), or heliotrope {Heliotropium europaeum).

Even after a short absence (2 or 3 days) from halogeton areas, they should not graze in dense stands. 3. Do not unload animals from truck into halogeton unless both supplemental feed and water are available. 4. Never allow hungry animals to graze in large, dense patches of halogeton often found around old bedgrounds, along trails or roads, and around watering places. 5. Do not trail thirsty sheep into watering places surrounded by halogeton without supplementing them with other food. Thirst inhibits grazing; sheep will not graze until they have been watered.

11, 647 (1975). Murphy, A. , J. Range Manage. 8, 76 (1955). Weed Science Society of America, Terminology Committee, Weeds 12, 328 (1964). Merrill, L. , J. Range Manage. 7, 152 (1954). INORGANIC TOXICANTS AND POISONOUS PLANTS J. L. Shupe, Howard B. Peterson, Arland E. Olson, and Gene W. Miller Utah State University I. ABSTRACT Poisonous vegetation and inorganic toxicants have caused death losses in animals throughout history. Livestock and wildlife are exposed to a multitude of both naturally occurring and induced toxic agents.

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