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Shaly Foothill #212 49A, 49B <br />7. Major Poisonous Plants to Livestock That May Cause Poisoning <br /> • <br /> Season Animals <br />Common ~ Scientific Name _ Dangerous Affected <br />Name <br />Drummond Astragalus drummondii Drummond milk- Potent- <br />milkvetch vetch has not ia11y <br /> been confirmed cattle, <br /> as being poison- horses <br /> ous to livestock. and sheep <br /> However, it is <br /> Listed as being <br /> suspected of <br /> toxicity. <br /> Season Animals <br />Common Scientific Name Dangerous Affected <br />Name <br />broom snakeweed Xanthocephalum when forage- cattle- <br /> sarothrae is scarce sheep <br />Effect and symptoms <br /> <br />Poisoning is not common but will occur on overgrazed ranges. Causes <br />i <br />abortion in cattle or may produce weak underweight calves. Losses are <br />sporadic and will occur when IO to 20 percent of the body weight of green <br />material is consumed in 1/2 to 20 weeks. <br /> Season Animals <br />Common Scientific Name Dangerous Affected <br />Name <br />threadleaf grounds el <br />Senecio longilobus <br />early spring <br />when forage is <br />short or on <br />over grazed <br />ranges <br />cattle & horses <br />Normally will <br />not affect <br />sheep if a <br />supplement is <br />fed on dry <br />range during <br />the spring. <br />Effect and symptoms <br />Signs may not appear until 6 months or more after plant is eaten. The best <br />prevention is proper range use. Symptoms are progressive and effects are <br />cumulative. Losses are sporadic. Degeneration of the Liver results. <br />Depression, weakness, diarrhea, darkly stained urine may be observed. <br />Animals may die quickly or wander aimlessly. <br />__~. ~ <br /> <br />-6- <br />