I am getting good early results with a spray application of about 2T
bicarbonate of soda / gallon of water in a pressure sprayer. (I have filed,
but not yet used, the whole milk / corn meal suggestions.) I am wetting the
leaves of my cucurbits to the point of run-off and making some effort to
get both sides of the leaves.
After the first application there was a noticeable decrease in infection
after about 3 days. Have just made a second application (5 days) for a
follow-up. Will continue until either the infection is all gone or I see
The bicarb does not seem to have had any effect on the bean blight. I did
not see many bugs on the beans this summer (3 bean beetles and one
grasshopper) and only had light chewing damage ... but apparently that was
enough to spread this disease over most of my trellis. Thus far I have
gotten 71 pts from 16ft of trellis and it looks like I might make my goal
of 100 pts ... but only just barely.
Last year this place was (literally) swarming with ladybugs ... but where
are they when I need them?
Urban Organic Gardening.