Cuprablau

Cuprablau is used to prevent development of mildew on tomatos and potatos. Mildew can kill our vegetables specaly when they are young. I use Cuprablau every year because it is not very strong poison and it is based on cuprum. This year mildew atacked celery and beetroot(the leaves became yellow) so I used Cuprablau for heal them bet it did not help. I think i made more damage then benefit. So never use cuprum based poisins on celery and beetroot.