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11/.5i-399 -5:32 719SC60525 LGL:, -7C~G PCl~E :h <br />_ -7- Loamy Plains 96 <br />7. Me1or poleorous Plants to Livestock chat Hey Cause Poisoning <br /> Season Animalc <br />"'Common ~ Scientific Name Dangerous Affected <br />• Name <br />broom snakewee3 Xanthocephalum when forage ca~tle- <br />• sarothrae le scarce sheep <br />Effect and symptoms - <br />Poisoning Ss not common but will occur on overgrazed ranges. Causes <br />abortion in cattle or may produce weak underweight calves. Losses are <br />sporadic and will occur when 10 to 20 percevt of the body weight of green <br />matsrfal is consumed in 1/2 to 20 weeks. <br />' ~~" Sees or. Animals <br />Common Sc ierti:ic Name Dangerous A=f ectea <br />Name <br />narrowleaf poisonvetch 9stragalus pectinatus early in cattle <br /> spring when <br /> forage ie <br /> acarco. <br />,_. <br />~ Effect and symptoms <br />poisoning is associated with selenium poisoning. When plants are crushed in <br />the hand, a sulfurous odor is given off. Poisoning is cumulative. Poison- <br />ing can cause alkali disaaee (the chronic disease) which develops from <br />eating small amounts of selenium-bearing veg®tatien over an excessive <br />period of time or poisoning can cause b11nd staggers (the acute disease) <br />which results from feeding on relatively large amounts of aeleniut in a <br />short time. In acute rases of selenium palaoning, animals walk aimlessly <br />into objects. "811nd staggers" or alkali disease era names given for the <br />disease. Aoofs grow abnormally with the formation of deep rings. The hair <br />falLS out--especially the mane and tail of horses. Rer_overy of animals <br />affected may take several months or years, even after being placed on good <br />forage. <br />Common <br />Name <br />Sc1er-t if lc Name <br />Season Animals <br />Dangerous Affected <br />silky erazyweed <br />Oxytropis sericea <br />All seasons but chiefly <br />mainly when horses <br />forage is <br />scarce. <br /> <br />