Pest identification and treatment help, please!

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Pest identification and treatment help, please!

Postby John » May 28, 2013 10:34 pm

I will attach some photographs of an insect pest which is attacking my Hibiscus syriacus, the Rose-of-Sharon.

I would appreciate help identifying this pest, as well as ideas for how best to treat against it.

Thank you!

John
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Pest identification and treatment help, please!

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Re: Pest identification and treatment help, please!

Postby Chris_W » May 29, 2013 7:28 am

Hi John,

They look like some type of scale insect: http://en.wikipedia.org/wiki/Scale_insect though I've never seen this exact one.

They can be treated with a light oil spray, or if it is really bad use a systemic insecticide. If not many I tend to just wipe off the adults (like these) and then treat with a general insecticide to kill any of the tiny babies that might be crawling around.
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Re: Pest identification and treatment help, please!

Postby John » May 29, 2013 10:18 am

Thanks, Chris. I checked the link, and see there are 8 or 9,000 species, so making an i.d. is hard. I note that these things are causing distorted growth on the ends of the shoots.
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Re: Pest identification and treatment help, please!

Postby Chris_W » May 29, 2013 8:22 pm

Zooming in on your picture reveals some of the babies on the leaf tips, so yes, they are feeding and causing distorted growth, much like aphids can do. They shouldn't be too hard to get rid of :)
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Re: Pest identification and treatment help, please!

Postby Buckeye » May 30, 2013 6:22 am

Compare it to cottony maple scale, or maybe cottony cushion scale. Either way, the hardest part about control is getting an insecticide through the cottony mass to the insect's body. They are probably still young enough to make it happen with many off the shelf insecticides. If not you may have to use something with a systemic such as imidacloprid.
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Re: Pest identification and treatment help, please!

Postby John » Jun 01, 2013 6:36 am

Thanks, Chris and Buckeye.
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