Warning about switch fungicide!

just a warning to anyone thinking of using it. had lots if rain towards the end if harvest. decided to use it on 2 of my 4 plants. couple days later returned back and the 2 plants i sprayed totally rotted. i couldnt believe it. originally all 4 had small amounts of rot. i picked it out and sprayed 2 plants as a test. the 2 i didnt spray where fine

Spraying a plant with bud rot is like adding fuel to a fire. bad idea...you want to keep the plant dry as possible with as much circulation around the flowers as possible.
Also using fungicides right before harvest is a terrible idea as well.