I was recently in Hanmer and noticed all the Doc200 traps used golf balls in them. Unfortunately I was unable to find someone to talk to as to how effective they were so now turning to trap.nz to see how people use them eg are they purely a visual lure and is another olfactory lure used in conjunction and secondly how effective are they ?
Have used them routinely although always in conjunction with an olfactory lure (usually fish oil on a ceramic lure and/or Erayze dehy rabbit). Can’t tell any difference from hens eggs. I have my doubts that real eggs are anything other than a visual attraction, especially once weathered when it’s likely that any residual natural odour will have gone.
I think the same thing about eggs being primarily visual lures. I also combine (fake) eggs with a variety of lures and baits. BTW, if you spray your Erayz with vinegar, it slows down the rate of mould-growth, and predators are vinegar fans, given the love of egg mayo.
I’d read about people using golf balls and ping pong balls, so I did some research in 2020, and found a company in Texas that makes life-like ceramic eggs for commercial farms to get hens laying. They made a shipping exception for me, since I’m involved in pest control, sending me a free sample. The husband of the woman running the business was once involved in bird conservation, which included pest control.
The manager of a conservation trust close to where I live, liked my idea for a study, and we’re about halfway through it to see if hens’ eggs and ceramic eggs makes any apparent difference. The eggs are being moved after 6 months to avoid site-bias.
- The ceramic eggs are white, which is a huge advantage, because finding white hens’ eggs is nearly-impossible these days.
- They’re the same size and shape as real eggs, so the go inside normal 3-nail egg-mounts.
- The only way that I can think of to break these strong eggs, would be if they got caught in a trap, which could occur if a rat ot stoat had cleared the treadle and tried to steal the egg.
- Ceramic eggs aren’t affected by UV, so they should last forever. I’ve had several golf balls crack in the sun, exposing the rubber inside.
If there isn’t a noticeable difference between the hens’ eggs and the ceramics, the trust will save a lot of money every year if they switch to them, because they operate thousands of traps. They aren’t expensive, by any means, even with the exchange-rate and the eye-watering cost of int’l shipping right now, it doesn’t take long before the ceramic eggs pay for themselves.
bottom line is that golf ball or any ball are the least effective bait. Rabbit fresh or salted is still the highest performing bait - not erayze
Hi rdf. As others have said, the golf balls are a visual lure only. Being white and egg-shaped, they are attractive to mustelids, rats and hedgehogs. If you wish to, you can buy plastic dummy eggs from Farmlands, which are pretty cheap ( they are used for encouraging broody ducks and hens) and use them in the same way. On the other hand, if you have a free supply of golf balls from living next to a course, you could use them and save the money.
Clean whatever you’re using every so often to remove the gunk that builds up in traps, so they stay nice and white. Also, if you put a blob of mayonnaise or other egg lure on them when you refresh the trap, that will enhance their appeal.
I read an NZ study that found Erayz to be approximately 80% as effective as fresh or salted rabbit.
Erayz is okay, but I wish it was dryer. In winter, it doesn’t very long to go mouldy. I’ve been spraying my meat baits with white vinegar. It’s been working really well to delay the speed with which mould starts to colonize it. I’ve been breaking kill records left and right this year, using quite a bit of vinegar, so it may make Erayz more attractive, too. Given how much predators like fresh egg mayo, I wouldn’t be surprised. It’s a cheap, easy technique, so I recommend giving it a go.
@willowflat_warrior Hey did you have a link to that study about Erayz?
We went to the $2 shop and bought plastic fake eggs and they work a treat!
I’ll see if I can find it.
S Brown , B Warburton , P Fisher & CR Bunt (2012) Optimising the
palatability and longevity of stoat baits, New Zealand Journal of Zoology, 39:3, 229-243, DOI:
Where Male stoats were found to have an acceptance rate of 88.9% for Erayz (V’s 100% for fresh Rabbit)
You can access the16 page document for yourself at this link. Look for the green “PDF” button to download a copy.
By the way - I’m beginning to curate a library of 100’s of documents like this for pest control and will post on these forums if it ever gets ready.
That isn’t the study I was referring to, unfortunately. I’ve spent hours trying to find the study that I referred to, but I’ve come up empty. The study was only comparing fresh rabbit, salted rabbit, and Erayz.
I recall the Discussion section, where the authors, both experienced trappers, concluded from their trials that Erayz was the best, most practical rabbit-based bait to use for large-scale conservation trapping, because its trapping-rate was on par with fresh and salted rabbit, it stays attractive to mustelids for a long time, and doesn’t rot, which is known to deter mustelids.
I’m pretty sure that they were DoC rangers, so they talking about checking large numbers of traps every 2-4 weeks. If you have a small number of traps that you can check frequently, and have a supply of fresh rabbit, then it should outperform salted or Erayz.
I’ll let you know if I happen to find it, but the odds are pretty low, I’m afraid.
Work done during the stoat program in about 2005 showed that because eggs are porus stoats could scent the contents of the egg.
regarding Erayz. In 2004 2005 I ran a 15month trial on salted rabbit, 220 double set traps, DOC northland ran a trial at the same time, but showed salted rabbit to be great. When Erayz came on the market I thought great I don’t have to chop up and salt rabbit anymore, unfortunatly the Erayz trial didn’t go well moldy soggy lures etc etc, caught 5 times as many rats as normal so it maybe a good rat lure but my stoat traps are for stoats not to get clogged up with rats. As for any argument that the rat might attract a stoat, stoats like fresh and rats go off fairly quick, after 20 years I have not seen any worthwhile link between dead rat in trap and catching a stoat
We are running animal fat only in 190 BT double set traps getting good rat stoat, double rat combinations over last 12 months.
I’ve been using a block of beef fat that I bought at Pak 'N Save for about $8.
- It’s a wax-like block that I cut into small chunks, about the size of a dice.
- It stays mold-free longer than most baits that I’ve used, due to its low moisture-content.
- It’s easy to use in tunnels and also in/on snap-traps.
- It’s pure white, so it’s easy for predators to see.
- The fat hasn’t been eaten by insects or invertebrates over the 2 weeks that I’ve been using it.
- Ship rats, brown rats, and mice are all big fans.
The downside is that it’s usually too brittle to skewer, and it makes gloves greasy. I’m using a pair of small tongs to handle it, now.