I have three tomato plants in the greenhouse, a Rutgers, a Brandywine,
and a Super Beefsteak. They are growing in large pots. Only the
Brandywine looks to be normal. The other two have developed some kind
of leaf curl in which the leaf rolls up and the underside of the leaf
turns dark purple.

I fear that cats may have gotten into the greenhouse and whizzed in
those two pots. Does anyone have the key to this mysterious 'mater
malady?