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Hollyhock Double Red with Rust

Wednesday, 02 May 12 Storms 29°C / 84°F

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Hollyhock has what look like eggs on some of the leaves. Can someone ID the dots and what to do about them?

I did some research and discovered it to be a rust defect that is common to Hollyhocks: http://learningstore.uwex.edu/assets/pdfs/A2613.PDF

Is there a way to prevent the problem from occurring?

This entry is about

Day 1948

Back Yard Looking West

Shade Tree Large garden

Day 1055

Hollyhock Double Red

Alcea rosea

Under Attack

Comments

  • HollyBee

    HollyBee wrote:

    Here’s what I’ve read – remove the leaves with the rust on them and in the fall make sure none of the rusty leaves or stalks are left on the soil. (I wouldn’t compost them, either) I have also had luck with shaking cornmeal over the plants when they emerge. It doesn’t get rid of it all (I’m not a neat enough gardener) but it helps. According to another folia member, the cornmeal works because of stuff farmers spray on their corn, so it’s not strictly organic, so you’ll have to make up your own mind about that. If your plants have gotten tall, you can also make a spray by soaking the cornmeal in water and using that water.

    Posted on 03 May 12 (almost 2 years ago)

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