In article ,
Steve wrote:

I've noticed in past years that when my cucumber vines get about 3 feet
long, SOMETHING happens to the growing tip. It gets kind of brown up one
side of the stem. The tip curls over and then dies.
Eventually the tip-less vine makes one or more side branch and the vine
grows on but sometimes the new tips die off too.
Today I noticed the first tips starting to be affected for this year. So
what does that? I've never seen any visible pest. I haven't used a
magnifying glass or anything.

Steve in the Adirondacks

Might look at

http://extension.usu.edu/files/publi...HG_2004-07.pdf

http://gardening.about.com/od/proble...umber_Wilt.htm
or
http://www.essentialgardenguide.com/...ems/9/Cucumber
/
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