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Old 04-23-2011, 08:07 PM
Location: El Paso, TX
142 posts, read 403,628 times
Reputation: 238


I noticed some very small raised black dots/spots on the leaves of my petunias. They are easily scraped off and do not move. There are some holes in a few leaves but not near the black spots. I have only noticed them on my petunias even though I have marigolds and impatients in the same planter. Does anyone know what it could be?

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Old 04-23-2011, 08:48 PM
3,565 posts, read 7,913,715 times
Reputation: 4864
I think you may find your answer at this link.

Annuals: Petunia pests, moth larvae, connecticut cooperative extension
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Old 04-23-2011, 10:27 PM
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I agree with Va-cat that looks like caterpillar excrement. They drop it from wherever they are chewing. I've had my battles with these critters. This time of year it would most likely be a hard to see green one, the Green Horn Worm. As the first buds form on the plants the next caterpillar to appear is the Tobacco Budworm (aka Geranium budworm) which tend to start out tan to green but take on the color of the flower they are eating. The best way to get rid of them is to find them (I need my reading glasses) and squish them. Next best is using Bt on them.

Tobacco (Geranium) Budworm

California Agriculture Online
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