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Jan 10th, 2023
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Joined: Sep 2009
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Has anyone ever tried eradicating nutrias with zinc phosphide?
I have heard you can bait them with sweet potatoes and carrots. Then add some Zn3P2 and the problem is solved.
My questions are:
1. Is Zn3P2 the typical active ingredient in rat poison?
2. Does it work on nutrias?
3. Will it harm my fish?
4. Does anyone have a better idea?
The nutria have rapidly reproduced and are now burrowing in our dams. We are also concerned about the wooden post/pilings that hold up our piers.
Any advice would be greatly appreciated. Thanks.
Chunk, wind and set the hook!
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Joined: Jan 2009
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Moderator Ambassador Field Correspondent  Lunker
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Moderator Ambassador Field Correspondent Lunker
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I can't answer the question, but I'm posing another one. If you do find a poison for them, will the poison still be active in their body if another creature eats that dead nutria?
Reason for asking is that I used DeCon on mice that were in the pheasant pen, being very careful to ensure that the pheasants couldn't get to the DeCon. I did see a few birds walking around with a dead mouse in their beak, and I believe all of the pheasants ate some or all of the dead mice. All of the pheasants died as well, same symptoms as DeCon poisoning. I looked at the bait trays, and they were still unreachable by the pheasants.
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I can't answer the question, but I'm posing another one. If you do find a poison for them, will the poison still be active in their body if another creature eats that dead nutria?
Reason for asking is that I used DeCon on mice that were in the pheasant pen, being very careful to ensure that the pheasants couldn't get to the DeCon. I did see a few birds walking around with a dead mouse in their beak, and I believe all of the pheasants ate some or all of the dead mice. All of the pheasants died as well, same symptoms as DeCon poisoning. I looked at the bait trays, and they were still unreachable by the pheasants. I'm glad I'm not the only one that has killed my animals Scot. 
If pigs could fly bacon would be harder to come by and there would be a lot of damaged trees.
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Trapping works and so do gators. A 22 works wonders on them as well. They are big rats.
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Joined: Jan 2009
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Moderator Ambassador Field Correspondent Lunker
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Moderator Ambassador Field Correspondent Lunker
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Cecil, I think I killed about twice as many pheasants that time as you did brookies.  Not only was I out the price of the chicks and raising them to adults, I had to eventually buy birds at around $10.00 each to use. Like you said earlier, I learn the quickest and remember my mistakes the best! Next year I switched to one bite and didn't seem to have that problem.
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I wonder if the pheasants were eating the undigested poison in the mouse's stomach and that is what killed them as opposed to the poisoned flesh of the mouse being the culprit?
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Joined: Feb 2009
Posts: 396
Lunker
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Lunker
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Whatever you do, do it quickly. Nutria reproduce like crazy and can do some serious damage to your pond structure and ecosystem. LA introduced them to munch on invasives, however turns out they like eating native cypress better, so now they have two problems. 22lr to the head
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Joined: Feb 2006
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Lunker
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Lunker
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I caught the ones in my pond with a regular live trap and carrot sticks
"Is the Poop-Deck really what I think it is?" - Homer Simpson
"A man can't just sit around" - Larry Walters, 1982
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Joined: Jan 2009
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CJ:
I'm guessing the residual poison in the flesh, because I didn't see that problem when I switched poison the next year to one that was just supposed to target the first critter to eat it.
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Pheasants will eat just about anything... That I have some to a solid conclusion of. After cutting open many pheasant crops it never ceases to amaze me what I find them to have eaten!
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CJBS2003,
Will a pheasant eat a nutria! Maybe that is what I need. Where can you buy a "nutria eatin'" pheasant? I am cracking up because I ask a question about getting rid of nutrias and we end up talking about the diet of a pheasant!
Seriously, thanks for the help. I will investigate much further before I put out poison. In the meantime, I will continue to utilize the 'ol .223. Thanks.
Chunk, wind and set the hook!
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Joined: Jun 2005
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Lunker
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Lunker
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CJBS2003,
Will a pheasant eat a nutria! Maybe that is what I need. Where can you buy a "nutria eatin'" pheasant? I am cracking up because I ask a question about getting rid of nutrias and we end up talking about the diet of a pheasant! Don't you mean "peasants"? I know for a fact peasants eat them. They supposedly taste like rabbit, which tastes like chicken. 
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Joined: Nov 2006
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Lunker
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Esshup, I killed some of my chickens the with rat poison. The dead mice were eaten by the chickens and the warfarin or dicoumarin (an anti-coagulant) in the dead mice likewise killed the chickens...du
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Joined: Jul 2009
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Lead poisoning is probably the easiest, most humane, and least likely to kill other animals way to approach this. 
Last edited by txelen; 12/16/09 05:26 PM.
Ponds in TX, lake place in WI, me in CA
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Ambassador Field Correspondent Lunker
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Ambassador Field Correspondent Lunker
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Use a red dot scope mounted on a .22. Goodbye nutria.
12 ac pond in NW Missouri. 28' max depth at full pool. Fish Present: LMB, BG, RES, YP, CC, WB, HSB, WE, BCP, WCP, GSH.
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