Plant disease ?

> From: Hardjono.Harjadi at Eng_Sun.COM (Hardjono Harjadi)

> 	Some of my plants (Hygrophila difformis and Hygrophila stricta)
>  start developing the following disease. The plant leaves are still green but
> there are quite a few small yellow dots with black centers on them. 
> After a while, the black dot gets larger and leaves a hole in the middle.
> Any idea what kind of disease is this ? All of the other plants in the tank
> (Ludwigia, water sprite, bacopa, anubias, riccia fluitans, rotala rotundifolia)
> are doing great.

Snail damage, maybe?  I see similar effects on some plants in 
snail-infested tanks.

(Whoo-hoo!  Mail works again for real this time!)

    - Erik

Erik D. Olson                		If mail to me fails, try sending to
olson at phys_washington.edu             	erik at marge_phys.washington.edu