Here's a study I came across yesterday. Found exel in combination with Serenade to be more effective than Exel alone in the control of bacterial wilt. Thymol was most effective it says, but don't know how good that would be for the Serenade if it's used. All treatments increased yield significantly; wonder if that's because of reduced disease pressure alone or a combination of lack of disease & vigor inducing qualities of the phosphite.
Thymol & Actigard used together reduced bacterial wilt & significantly increased yields.
They found Exel combined with reduced copper plus mancozeb treatments as having the best results for bacterial spot.
http://www.reeis.usda.gov/web/crispr...es/207620.html