i would not be spraying that late into flowering. that is my personal opinion. i prefer predator insects to kick ass instead of chems that late into flowering. i use a neem oil, einstein oil, (this is how i use it) within the first couple weeks of flowering via foliar feed. what did work for me late in flowering for spider mites was a predator insect called Phytoseiulus Persimilis, google it. i was told lady bugs would take care of it, and they did not work for me. for me lady bugs did like aphids. maybe also consider predatory nematodes by natures control in oregon. they will feed off the eggs that are laid/put into the soil which is where more spider mites will birth. you use one pack of 1million nematodes with a watering, into soil not foliar.