DIY beetle spray for azaleas/rhodys

fireweed_1947(Western Wa 8)May 3, 2013

My low growing azalea is under attack by something. Many leaves are chewed and/or skeletonized and leaves are slightly yellowish with a bit of brown - but not the leaf ends. Garden books suggest beetle as the chewing culprit. I read of a DIY spray for beetles using 1T of isopropyl alcohol and pyrethrum (forgot the ratio). Has anyone heard of or used this? I've also seen a product with pyrethrum and canola oil base. Any recommendations please or would photo be best to get started? Thank you.

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A good photo of the damage would be an extremely good place to start!

I would also suggest visiting the plant at random times of the day in an attempt to catch any critters in progress- dawn is a good time to start.
It is my opinion that treating for pests without a solid ID can be very futile as well as ultimately damaging to the plant in question.

I have had very good success forwarding photos (or taking a piece of the damaged area) to my local cooperative extension office. They are quite familiar with all the pests and other maladies prevalent in your area. You can find them in the white pages listed by county.
They are an overlooked resource IMO.

    Bookmark   May 4, 2013 at 10:04AM
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fireweed_1947(Western Wa 8)

At last a picture of the leaf damage! I'm hoping there's a spray remedy or some such as I have trouble getting up after I've gotten down!

    Bookmark   May 22, 2013 at 7:37PM
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morz8(Washington Coast Z8b)

That's weevil damage, and they are night feeders. You need to go out at dusk and later, after dark, to hand pick if choosing that control...

Here is a link that might be useful: weevils - rhododendron

    Bookmark   May 23, 2013 at 12:57AM
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fireweed_1947(Western Wa 8)

Thank you. Now I know what I'm dealing with.

    Bookmark   May 23, 2013 at 2:53AM
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