How to getridof those japanse beetles

Question

i have beautiful roses in my backyard well the japanese beetles got hold of all my roses and ate them. does anyone know how to get rid of them? where did they come from

Answer 1

The best is a two pronged approach.

First treat your lwan and ornamentals with a subsurface pesticide like Merit (Imidacloprid is the active and you can find it under several trade names.) You will treat with the beetle is in the grub stage. (Visit with your local university and/or extension office to find out your timing.) This will get rid of what is in your yard.

You will treat with Imidacloprid once again right before the beetles are going to take flight. Imidacloprid is systemic, which means the plant will absorb it. This will help fight off the little critters.

Second, during flight times spray with either sevin or bifenthrin. These will help keep them away.

Happy hunting.

As always - consult your local extension service or university for more information in your general area.

Answer 2

Originally they're from Japan.  Here in the US they have no natural enemy, so they're truly a pest. (well, my inlaw's dachshund likes to crunch them, but after 20 or so she's full!)

The Japanese beetle's eggs hatch to become the grubs the moles love to eat and then ruin your lawn!

The best (and "greenest") way to get rid of them is to treat your lawn with BT, or baccillus thurengensis powder or granules. You can get it at any feed store (small town) or a lawn & garden place, or Home Depot, etc.  It infects the Japanese beetle grubs and multiplies in the groud, innoculating it so no more grubs can grow wherever the BT has spread.  One application's good for many, many years.  Gets rid of the moles too, because they have nothing to eat in your yard.   For the record, BT is also known as "milky spore".

For now, set Japanese beetle traps, which attract the adult beetles with a pheremome-based attractant and they fall into a plastic bag.  You could cover your roses with a fine netting.  The Japanese beetles sleep on the ground at night and fly upward to feed and mate on your plants in the day.  If they can't reach your roses, they can't eat their leaves.

Answer 3

I have heard both good and bad things about the traps, and i have dogs so chemicals are out of the questions. One other option that I had read about and have been doing is hand picking the little snots. Just go out in the evenings and pick them off and drop them in a bucket of soapy water, then spray your roses with a mixture of the same (soap and water). Within 2 days I noticed a difference. There is a product, I think it is called milky spore?? You can put it on the ground and it will kill the grubs that turn into the beetles, for future protection.