I'll leave it to the current experts on the 2,4-D itself.  Back in the 
early 80's I did extensive literature searches for a project for the CA 
Board of Water Resources on 'Ag effects on instream beneficial uses in 
the San Joaquin watershed'.  A couple of interesting tidbits, 
especially considering how limited the testing sensitivities were in 
those days:  1) Effects at the 6 parts per trillion level on fish 
development, especially spines, for some pesticides (toxaphene for one) and
2)  Most of the damage to aquatic and riparian (stream edge) 
invertebrates was from 'inert' ingredients such as the surfactants and 
adjuvants used in herbicides and insecticides. In particular 
surfactants, which include soaps and detergents, affect the surface 
tension of the spiracle and other membranes and thus affect respiration 
at very low levels when there is direct contact.  Oils also are used, 
and can layer on liquid surfaces.   I'm sure much more is known now on 
the physiological effects.

The take-away, beware the 'inert' ingredients.

Carolyn in SC

Bob Harrison wrote:

> ...It is my understanding that 24D only kills bees when sprayed on bees and 
> the
> bees do not make it back to the hive.
> I would appreciate any information the list could provide involving the use
> of 24D and honeybees. Jerry B.?
> Thanks in advance.

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