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Published August 04, 2010, 01:21 PM

30 cows die in S. Idaho after eating larkspur on Simplot ranch

ROGERSON, Idaho — About 30 cows died after eating a poisonous plant growing on a J.R. Simplot Co. ranch in southern Idaho.

ROGERSON, Idaho — About 30 cows died after eating a poisonous plant growing on a J.R. Simplot Co. ranch in southern Idaho.

The cattle ate larkspur, a wildflower that the U.S. Department of Agriculture blames for causing heavy cattle losses in western range states.

Simplot ranch manager Chuck Jones says a herd of about 500 cattle had just a single water source — and to reach it, they had to pass through a field of larkspur.

The deadly plant is especially abundant this year in parts of Idaho after two successive springs with plentiful rainfall.

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