Use the traps only if you want to bring them all from the neighborhood to your yard. Or if you have a neighbor you aren't especially fond of offer to let them use your traps.Then the bugs all go over there.
We get infested usually about this time every year. The best way to beat them is to do the beetle stomp. Place a flat board in the garden. Put a pair of closed toed shoes on and smush the little suckers after you grab them off the plants. The alternative is a ziploc bag or bottle full of water. (No ziplocs in the raspberries though... my kids were little and we gave them the bags so they could manage easier, they ripped the bugs went in the top and out the bottom )
The treatment for the soil is expensive but works. We like the stomp it usually will keep the kids busy for about an hour a day and they get quite a competition going!
If I remember correctly, Neem spray repels them. Maybe you could spray your plum tree with that. Since you just planted the plum, I am assuming it is still small. You could cover it with netting. You can get nylon netting at fabric stores.
We've had more than usual this year I think. I knock them off in a bucket of soapy water every day, but there always seem to be more! I heard a great way to use the traps; hang one in your chicken yard, and remove the collection bag. Apparently the chickens learn to jump up and get the beetles when they're lured into the trap. I sure wish our chickens were close to my garden.
I fill a jar with kerosene, put on a pair of gloves, and walk around picking them off of everything on throwing them in the jar. They only seem to be out in hordes for a short time each year. How could such a pretty little beetle be such a nuisance?
this is the first year I haven't had a problem with them and I have planted more heritage roses too. What I find is usefull is the chickens and cats... I planted the rose garden so the birds and cats can walk and sleep under the plants and trimed the front part with dusty miller instead of marigolds. Seems having less shelter around the plants and the constant movement makes it less desirable for the bugs.
The chickens eat the bugs and leave fertilizer so its a good thing all around. I am still having a problem with Iris borers... any suggestions?
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