How far into flowering are they?
When your spraying try not to soak the buds totally and get the underneath of the leaves to and the stems but they usually get wet when your spraying the rest of it anyway.
Remember it has to be a pump type sprayer as trigger types shread the trichoderma and kill it before it reaches the plant, also have the nozzle on a course setting not to fine or again it will shread the trichoderma as it will if you pump it up to much so dont have it pumped right up and blasting out.
You really need to remove any inffected leaves to before you apply it as it will continue to spread if you leave inffected leaves on the plant as its already ate into those parts of the plants and will now be in the tissue of the leave.
I just sprayed mine for the last time there and there 6 weeks into flowering, some seriously big buds but i'm hoping it wont cause budrot, others have done it and seems fine so heres hoping

E2a:- dont think it would do anything to the taste to be honest.