did this chart come from someone in the southern hemisphere?

judo_and_peppers, I dont think so. I would expect bacterial wilt/spot to be more prevalent in the summer months. Don't know about the rest, but those make sense anyways.

The source of the chart:

IPM (Integrated Pest Management Florida)
University of Florida

Disease Management: Integrated control

it just stuck out to me that it didn't include july. UF isn't too terribly far from me.