Skeletonized Hollyhock Leaves - Knowledgebase Question

Center City, MN
Question by jkdelve
August 20, 1998
What pest would skeletonize the leaves on a hollyhock. The plants are still blooming but all the leaves are almost gone. We've sprayed and then looked for dead ones but never find anything.


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Answer from NGA
August 20, 1998

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Skeletonized leaves are usually the work of young catapillars, before they grow large enough to eat the entire leaf.
Look under the leaves for them. You may see a flattened, slug-like creature feeding there. Some insects are most active at night, so if you can't find them in the daytime, do a Sherlock Holmes investigation with a flashlight at nite!

If you find catapillars, sprays with B.t. as the ingredient are a safe, organic control option. These are available in many brand names.

Good luck with the investigation!

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