zippering of tomato
Zippering-This is not an infectious disorder. The scar that appears along the fruit is caused when a flower drags along the embryo (fruit) surface as it enlarges.
Figure 1. Zipper scar on tomato. Note flower adhering to fruit. 
Figure 2. More severe zipper scar has opened up tomato fruit. 
Figure 3. A range of zipper scar symptoms on tomato.