Re: stinky split vines and yellow-blotchy leaves

Diana,
It sounds like Gummy Stem Blight. This is what my book states: Gummy Stem Blight is common to all vine crops and occurs on all plant parts of them. Infected stems often develop cankers which secrete a reddish-brown, gummy fluid, hence the name. On leaves, the disease often starts on leaf margins, and then gradually invades the entire leaf, causing severe wilt and death of the leaf.
This disease is most prevalent during warm weather combined with prolonged rain or high humidity. The fungus over-winters on plant residue, so careful collection of residue plant materials, and burning, are the best ways to reduce chances of the disease.
Since high humidity is ideal for spread of this disease, spraying programs should be stepped up during this time. Overhead watering should be avoided at this time. General fungicides like Captan and Daconil control this disease very well.
This information was taken from Book 1 of Don Langevin's "How-to Grow World Class Giant Pumpkins". 

Yellow vines are common.

Hope this helps!

George Heyne
Rochester, MN
----- Original Message ----- From: "Diana Sigel" <duchessofgladstone@yahoo.com> 
To: <pumpkins@mallorn.com>
Sent: Thursday, June 04, 2009 9:35 AM
Subject: stinky split vines and yellow-blotchy leaves
Well, I don't see my question appearing on the list, so here goes; I'll try again. Yesterday I found a yellow vine which had split and the inside was a bright orange color, and it smelled nasty. Several of my plants have leaves 
which are yellow-blotchy starting at the outside edges, and some of their
vines appear kind of yellow, too. I amputated the split portion of the vine 
back to clean with no yellow, then sprayed with strong bleach solution.

1.  Are yellow vines normal?
2.  Was the amputation right and necessary?
3. Is it possible the yellow blotchy leaves are related to the yellow stinky 
vine?
I've not seen any more cucumber beetles or squash bugs since I got a good dose of systemic insecticide in them. Well, one or two, but they're always dying, 
not having a good time!
Also, could these problems be caused by too much rain or too little moisture in the ground? We may have compacted the ground when it was so mucky wet a 
couple of weeks ago.

Thanks for any help

cheers,
duchess of gladstone

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