"Bigus" wrote
My spearmint, which was growing nice and healthily a few days ago, has got
several leaves which are covered in brown spots. On the underside of the
leaves (or most of the leaves with brown spots anyway) is a greeny-white
bug with some unidentifiable black material (kind of looks like the bodies
of crushed ants!) attached to it.

I've taken a picture of one of the offending leaves, which you can see
he

http://www.creationfactor.net/misc/mint.jpg

I've read on one website that the only disease mint gets is rust, which is
described as orange and the pictures I've seen don't look like my leaves
do. So, I'm inclined to think it's these bugs that's causing the spots.

Does anyone know what the problem is and what I can do to stop it? I was
rather looking forward to some nice home made Mohitos this summer!

There is a Mint Beetle but both the adults and larvae are black I
understood.

--
Regards
Bob Hobden
W.of London. UK