[dice]

You were probably thinking that since the pesticide claimed to
be safe to use on tomatoes, the worst that could happen by
using 4x the recommended amount is that you used more than
you needed to. Perhaps not.

(I dislike spraying just because it is inconvenient to do it on
a regular basis for a lot of plants, but I tend to be suspicious
of the "inert ingredients" in any kind of commercial chemical
sprays and water soluble products, too.)

I seem to recall that the Florida grower's thread from last
winter and spring had some discussion of whitefly problems
(possibly with recommendations).