I can tell you a method that works (used it myself) and does the most damage to the population long-term. You have to keep up on it but I saw my numbers drop like crazy from year 1 until this year, year 4. Before I started I had bugs eating evening in site. We moved in our house and in the first summer these beatles were everywhere. They ate everything in site. Year 2 in the house started off the same. I got a total of 4 of those bug bags traps and set them up around the yard. At first I was replacing the bags 3 times a day and sometimes waking up in the morning to find the bags overflowing. As the season went on they just kept coming and I could never keep up. I just replaced when I could. This was attracting every beatle in the neighborhood to my house. Close to the end of the growing season I did a sample in the yard to find about 10-15 grubs in an average size bareroot hole. That's when I bought Sevin granules for the yard and applied right before fall. I did this site to the fact the grubs start to burrow deeper as weather gets colder. Starting the next spring I did another round of Sevin, fall one more, etc. I now notice I have little to no grubs in the soil and only having to deal with a handful of Beatles a day. Not bad if you ask me. This year has been the worst in the last 4 but I also didn't apply Sevin this spring.

I'm absolutely inundated. They are everywhere, and my roses are in the middle of another flush at the moment. I've had JBs for the last 2 weeks, and they are so thick that they hit me in the head when I'm outside painting or gardening. My neighbors now think I'm the "crazy plant lady with Tourette's" after watching me whack them out of the plants and into the bucket, all the while laughing like a maniac & spewing four-letter-words at the ones that get away. I'm thinking it's only a matter of time before I see a video of myself on youtube. By the way, nothing chemical has worked. Not the grub treatments to the lawn, Sevin, Merit, garlic-water spray, soapy-water spray, zero. The only thing that works is annihilation via thumb and forefinger. It's a lot more satisfying, too!

Japanese Beetles' rely heavy on scent, and you can use that as a weapon against them. Here's how: Kill the first Japanese beetles you see in your garden. It's important that you catch them early, so keep a close watch. They regularly appear during the second week of June in my area. You may be a few weeks ahead or behind that schedule. When you see a few beetles, get to work: Fill a bucket about half full of water. Add a quarter of a cup of dish soap. (The amount of soap isn't that critical as long as it's present.) Snag beetles with you gloved hands and place them in the bucket. If touching them doesn't appeal to you, you can knock them into the bucket by giving the branch they're on a quick shake. This could take some practice. Leave the beetles in the bucket. They'll die and begin decomposing. The smell will deter other beetles, and the presence of soap will discourage or kill mosquitoes. (The bucket will only smell nasty to beetles.) Set the bucket in an area where you've had bad infestations before, or select a spot that gets good airflow. In doing this, you're letting new beetles know that the area is off limits. Think of it as the beetle equivalent of razor wire. Leave the bucket in place for at least a two to three weeks, adding to it every couple of days. You'll see beetle activity slowly diminish over that time. If you start this procedure too late in spring, it won't work nearly as well -- if at all. _____________ The soapy water works. My method is a little different. I half-way fill a plastic bowl (soft spread margarine or whipped topping) with water and a few drops of dish soap. I also fill a spray bottle with the same solution. Shaking the branches over the bowl often causes the Japanese beetles to escape, so I spray them first with the spray bottle. With soap in their eyes and on their wings they don't immediately fly away, giving you time to knock them into the soapy water solution in the bowl or to pick them off before they fly away. Using several bowls allows you to spread them out increasing the effectiveness of the dead bug scent as a deterrent. http://forums.gardenweb.com/discussions/1710432/organic-solutions-for-japanese-beetle-control hope this helps...I just did this, I hand picked them, added them to boiling hot water and dishwaching liquid, instant death, now hoping the scent will deter others. don't want to use any poison even milk or tobacco spray kills any soft-bodied insect and I love my ladybugs and their larvae :-) Fortunately I have many wild insect-eating birds. this is how Japanese beetle larvae looks like

The brand in the photo is Rescue. They have a zipper at the bottom that slides like a zip-lock bag. They're hard to unzip when they're full though. The zippers on mine finally broke so I've been duct taping Walmart bags to the bottom to catch the beetles. That works almost as well. Carmen - Do your neighbors have Asian Ladybugs too or do they all go to your house? The article below says "Contrasting light-dark features tend to attract the beetles -- dark shutters on a light background, light shutters on a dark background..." Another article I read said they're more likely to enter homes that have a cedar shake roof or wood siding. They invaded our shed one year but haven't moved into our house yet. Here is a link that might be useful: Asian Lady Beetles