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josephines67

Small, light coloured spots on foliage...

Someone posted a picture recently showing a green leaf with round, light coloured spots. I don't recall who it was, I'm sorry, and I searched back 5 pages trying to find it. Even doing a search failed.

I think this is what the posted pic resembled. I don't recall if the OP received a diagnosis. Just in case, here is what I found on the subject.

I found it in The Field Guide to Hostas by M. Zilis while looking something else up.

The problem may be Western Flower Thrips. Symptoms: small, light coloured spots appear on foliage,...common to greenhouses. Apparently fragrant flowered hostas are the first types attacked by western flower thrips.

Thrips can pass impatiens necrotic spot virus and inhabit flowers of many types of plants, including hostas. They can build up in such high populations within plant tissues that the foliage "develops light spotting".

Chances are your hosta was previously grown in a greenhouse that hosted these western flower thrips. I think it's worth a google search.

This picture is what triggered my post.

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