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Johnsongrass/Prussic acid
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<blockquote data-quote="greybeard" data-source="post: 1170821" data-attributes="member: 18945"><p>As I understand it, the JG has to have been stressed first--either by drought or frost, and then the new growth is the toxic stage. </p><p>But with drought stress, I don't think it's that cut and dried or that simple. If it were, 1/2 the cattle in E Texas would be dead right now. Aug was very dry, then we got some rain the very last days of Aug and last couple of days. Most people, myself included, have at least a little jg in their pastures, even tho I try to keep it killed off.</p><p>Look at how cattle move across a pasture, whether it's a big pasture or small. They'll come across a clump of jg, eat it down almost to the ground then move on. Might be 2 days before they get back to that spot again and likely as not, it has new growth, and if any rain fell on it, it's sure to have new growth, but I haven't had any tetany/prussic acid problems (knock on wood).</p><p>There has got to be more to it than just drought stress and new growth.</p></blockquote><p></p>
[QUOTE="greybeard, post: 1170821, member: 18945"] As I understand it, the JG has to have been stressed first--either by drought or frost, and then the new growth is the toxic stage. But with drought stress, I don't think it's that cut and dried or that simple. If it were, 1/2 the cattle in E Texas would be dead right now. Aug was very dry, then we got some rain the very last days of Aug and last couple of days. Most people, myself included, have at least a little jg in their pastures, even tho I try to keep it killed off. Look at how cattle move across a pasture, whether it's a big pasture or small. They'll come across a clump of jg, eat it down almost to the ground then move on. Might be 2 days before they get back to that spot again and likely as not, it has new growth, and if any rain fell on it, it's sure to have new growth, but I haven't had any tetany/prussic acid problems (knock on wood). There has got to be more to it than just drought stress and new growth. [/QUOTE]
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