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
>>>
