Pencil Plants

Aphids on Pencil Plant

Anonymous added on June 27, 2011 | Answered

I think this plant has a tough case of aphids. However, the insects have a brown hard cover. From the picture on this site of aphids, they look black like fleas.

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Certified GKH Gardening Expert
Answered on June 28, 2011

If they have a hard outer shell, it could actually be scale bugs. Here is an article that you may find helpful:

At any rate, neem oil is an effective treatment. Here is more information:

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