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Re: Bumps on Grape Leaves?

  • Subject: Re: [cg] Bumps on Grape Leaves?
  • From: Sally McCabe <sallymcc@libertynet.org>
  • Date: Thu, 5 Jul 2001 18:12:21 -0400

Having experienced this in my backyard for the last 20 years, I would wager
a guess that your grapes have "brown rot," a generic term for the plant's
reaction to any number of fungal invaders. It's followed by browning and
then raisin-ing of the grapes, a few at a time, spreading by rain splash.

 If it's only on a few leaves, cut them off and dispose of them in the
trash, NOT compost. Early spring (pre-bud)  application of either a dormant
oil or lime sulfur spray does the trick. Clean up ALL leaves in the fall
and dispose of them far, far away.


At 9:10 AM -0400 7/5/01, Powers, Stephanie wrote:
>Hi Everyone,
>This year an elderly neighbor donated grapes to our garden. He gave us four
>new cuttings, just sticks without roots.  The cuttings seem to be taken very
>well, although I believe the elderly man has been coming by and watering
>them a bit too much.
>One of the plants have small bumps on its leaves.  I noticed yesterday that
>there is a white substance on the inside of the bumps on the underside of
>the leaves.
>Do you have any suggestions on what this is, what it is caused from and how
>to fix it?  Also, do you know of any good companion plants for grapes.
>Thanks for your help!
>Stephanie Powers
>ARROW Community Garden and Center
>Astoria, New York
>community_garden maillist  -  community_garden@mallorn.com

community_garden maillist  -  community_garden@mallorn.com

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