brother
check this out
I don't have any experience with it so can't say what kinda effect it will have during flower, but maybe some of the forum members will be able to shed some more light on the product.
what I do have experience with is struggling to find anything that is at all OK to spray during flower. even plain water on your flowers can cause things to go south if you don't know what you're doing.
hands down, best of the best results, would be a preventative mesure. I know it's too late now, but for future just keep this in mind. You buy a bottle of BioNeem, once a week you make 1 to 2L of it and spray all your plants. (IN VEG ONLY!!!) and I mean ALL your plants.
the way this porduct works is gold, it strengthens the immune system of your plants giving it the strength to fight against diseases by itself aswell as making the plant unfavourable for insects. this porduct will not harm beneficial bugs, because beneficial bugs don't eat your plants. the Neem also provides a number of trace elements and even some secondry nutrients with each application acting as a growth stimulant aswell.
I haven't seen pests ot any kinda mold in my garden for ages
don't know why people would go any other route.