"Goat" wrote in
newsNwSd.17464$uc.15883@trnddc01:

I have been looking for temperatures associated with insect
hatches. So far I really have not been able to find anything. Do
any of you have any such info. Water and /or air temps, degree
days whatever. Or also environmental indicators such as plant
buds/blooms associated with insect hatches or other Phenology.


This book is still on my list. A fishing friend recommended it:

http://www.about-flyfishing.com/libr.../blphenfly.htm

Merwin has a section in one of his books that covers some Phenology
too. Namely:

Hendricksons and Forsythia, Shad flies and shad bushes (also
corresponding with the shad run in the Catskills), peonies and
sulphers, cardinal flowers and tricos, and fringed genetia and bwos
in the fall.

On the temps side, I have always observed Hendricksons start to pop
between 50 degrees F and 52 degrees F (water temp). Trico spinners
start falling when the air temp hits 68 degrees F. These observations
may well be localized.

HTH,

Gary