In article , says...

I have sometthing even better , I have an older gentleman gardener that
loves to share his knowledge of local problems . I carried a couple of the
yellowed leaves over yesterday bought some 'maters from him , mine ain't
ripe yet and he knew at first glance what the problem was and how to fix it
. He wasn't sure of the name of the particular fungus , but he knew what to
use to stop it . Sprayed fungicide last night at dusk and today they're
recovering nicely .


http://aggie-horticulture.tamu.edu/vegetable/

With attention to the problem solvers.