Leaf drip

[Jonathan M. Greenberg]

That's right. They produce a phenolic compound called juglone that seems to
be responsible.

Jon Greenberg

>>Under our Wallnut trees (Juglans regia) I find there is no moss growing
>>amongst the cobbles until outside the leaf-drip zone where a healthy carp=
>>et
>>of moss has grown. 
>
>>Is this a well known fact, if so what is the explanation.  Otherwise, wha=
>>t
>>do you think?  Are there inhibitory chemicals in the water dripping off
>>SOME leaves?
>
>Some plants excrete inhibitory chemicals into the soil around them, in an 
>attempt to reduce competition.  Walnuts are famous for this.  This phenomenon 
>is termed allelopathy.
>
>Monique Reed
>Texas A&M
>
>
>