Purple Sage Leaves Skeletonized - Knowledgebase Question

Madison, WI
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Question by elbriggs4
June 25, 1999
My purple sage has been beutiful up until now. I presume it is something eating on it as all of a sudden the leaves look like lace with hundreds of little holes in them. I never see anything on them but wonder if you know what the problem could be. I have noticed that there are scads of water bugs in the ground around them. Could they be the culprits?


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Answer from NGA
June 25, 1999
If they are "true bugs", then they feed with a piercing/sucking mouthpart, not chewing jaws, and the sage has been chewed up. Slugs, sawflies, Japanese beetles, and other beetles can leave this sort of "evidence" behind. Since you don't see anything feeding on them, I vote for slugs, which prefer to feed in the dark, when it's cool. You can catch them by surprise if you visit the sage with a flashlight this evening.

To prevent further damage, dust the plants with diatomaceous earth (DE), which slugs don't like to touch. DE is available at most garden centers and many mail order gardening sites. Best of luck!

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