In article , says...

"Charlie Pridham" wrote ...
Some kind person has dumped two lorry loads of fresh horse manure at the
side of our gates to our allotments, a large grab lorry was seen dropping
it
over the fence.
Considering what's going on these days regarding herbicides I wonder if
there is any way to tell if this mountain of manure is contaminated
before
some of our gardeners start use it.


yes just put some young tomato plants in it the leaves will react in
hours if there are problems

But this stuff is fresh and steaming Charlie, so unless I'm mistaken would
burn the roots anyway.
Could dilute some and use it as a fertilizer, would that work or is the
herbicide not water soluble?


worth a try, tomatoes are incredibly sensitive to the stuff.
--
Charlie Pridham, Gardening in Cornwall
www.roselandhouse.co.uk
Holders of national collections of Clematis viticella cultivars and
Lapageria rosea