Immunox on cherries

I would like to use Immunox on my cherries for brown rot. Any advice?

first line of defense is sanitation - removal of mummies both on the tree and on the ground - brown rot is non-species specific - meaning if there are alternate hosts in the area,  inoculum levels will be high -

so,  you're gonna spray -

start early - if you've had problems,  inoculum resides on/in twigs,  buds, fruit mummies, even within woody tissue - so start with a dormant spray - a copper containing spray is a nice broad spectrum fungicide,  but must be applied before bud break -

I googled 'Immunox' and Spectracide doesn't advertize the active ingredients - some secondary sources suggest to me the AI is a sterol inhibitor - a relatively modern chemistry - quite safe to humans/animals,  effective at very low rates, and has 'curative' properties,  in that it can be applied after an infection period (an combination of time,  temperature, and inoculum that will result in a disease infection) and prevent/arrest the development of the disease (up to a point - 48 hrs from the start of the infection period is a common figure)

the down side is that the chemistry of action is quite specific and is fairly readily overcome by the brown rot organism - a couple of years of application and likely that 'miracle' chemical will no longer be effective -

so - rotate - maybe 3-4 applications a year,  alternated with an equal or greater number of applications of a non related chemistry - captan has three separate modes of action, non of which is related to the SI mode - - of course selection pressure is minimized if your crop is kept 'clean' rather than trying to gain control over a rampant infection -

coverage - if you're gonna spray, do a good job - an effective dose of chemical must reach every surface of plant -

timing - keep things on a preventative schedule - much better to spray three days before the rain,  than a day after -

"won't it wash off?" well,  SI's are locally systemic and won't wash off,  as a matter of fact - chems like captan will indeed weather,  but similar to a condom,  it needs to be in place at the critical moment -

good luck -