Karen, I have used the spray for a long time. Due to the fact my first true love of plants are Miniature Roses, and I used it for years on them. As for the fan in my GH the fans run 24/7 all year long, high in warmer months and low in cooler months.
But I know the Brugs were like a magnet for those darn spider mites. I had one Plumeria that started getting them this year puled it away from the others and sprayed it a few times looks good now.
