Thanks to R. Pauli for sending me this link.
Figure 3. Ozone damage on watermelon; notice different degrees of yellowing and necrotic areas as the damage worsens from A through F. Photograph B looks very much like TSSM damage. Photographs courtesy of Gerald Holmes, NCSU Dept of Horticulture.
Yikes, does this look like everything everywhere, or what?! I will be spending days following all the links!
Here is a bit of a message to a friend,