Trees communicates???????

[Nancy Harrison]

Guillaume, some research in Calif shows that Oak trees infested
with tent caterpillars or some other pest will communicate this
to other Oak trees.  They will then become more resistant.  No,
I don't have any references to give you, but I'm just
suggesting that you are not alone in having heard about this
kind of phenomenon! A toute a l"heure - Nan in Calif