Japanese Beetles Archives

There seems to be a ton of Japanese Beetles this year – these fat little buggers can really do a number on plant leaves – eating them leaving holes or just ragged parts of leaves. Spray is one option and I know folks who use Sevin and others but another option that does not involve spraying is to put up traps that are made just for them.

Here’s one example of the damage the Japanese beetles can do.

This close up photo of the culprit. It’s from Wikipedia (1) shows a Japanese Beetle. You can easily catch them eating leaves during the day to confirm whether they are the actual pest or not. You can also sometimes spot them flying away from plants as well by the way.

Personally, I use the Spectracide Bag-A-Bug Japanese Beetle Traps. I kind of fell into them years ago – I don’t even recall how. I think someone recommended them to me and I have used them ever since. They are very easy to assemble and definitely do the job.

The package has the the plastic frame that holds the bag and the bait (that brown disc in the sealed aluminum package, and a long wire tie to suspend the trap and two bags. It does not come with a stand. You can buy one, make one or hang it off something that you already have – the target height should be with the bottom about a foot off the ground. The bait/lure is supposed to be good for about 12 weeks – enough for the season.

These are bushes near our garden. The recommend putting the trap 30 feet away from plants you care about because you don’t want to attract the beetles and have them decide to stop and eat your plants vs. going to the trap. I have four traps up this year protecting areas where we have plants and vegetables and have caught literally hundreds of beetles in less than a month.

The way it works is kind of interesting. You put the bait block on the trap and the rather clumsy beetles fly for the bait, hit the walls of the trap that are smooth and have nothing for them to grab onto and they fall down in the trap. Once in the trap, the walls are also smooth and they don’t have enough room to fly so they are stuck there and perish.

This is the top of the trap. The beetles are attracted by the bait, hit the walls and fall down. It really works.

There are probably 2-3 dozen beetles in here after a few days. The most stunning situation I had was putting a trap out not far from rose bushes we have and I had dozens of beetles trapped in less than four hours.

They do make and sell a purpose built stand that comes in sections. I bought a few of them but I just make them now out of 3/16-1/4″ steel rod. The sections are easy for storage but you do need to avoid losing pieces. I lost the top hanger of one and made a replacement.

In Conclusion

The Spectracide Japanese Beetle traps work great and I have no hesitation recommending them. I have read reviews/posts where people complain about the bag ripping but I am not sure why they had a challenge. I only have two recommendations – don’t put them in amongst the plants you care about because they will absolutely lure the beetles right where you don’t want them and the second is to make a couple tiny slits at the very bottom to help water drain out.

These traps definitely work and I hope this helps you save your plants!!

Note, Amazon sellers tend to be very expensive. EBay tends to have far better prices for these traps and accessories like bags and stands:

Photo source (#1) is By Beatriz Moisset – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=78747216

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