2 tbs. of your favorite hot sauce
2 tbs. lemon scented dish liquid dish soap
1 plug of chaw, (chewing tobacco). Or a bunch of butts in a
cheese cloth wrap for easy removal before spraying.
1 gallon water.

Let chaw mix for a bit.

Pump sprayer to apply.

First use a high pressure hose nozzle to knock most of them off
the undersides of leaves. (this is probably what works the most).

I did this to my lemon tree when they ritually appear in March. This
year at the first signs of them I washed then applied. Kept them
white flies down to nearly zero. I don't notice them.

Jeff
zone 8
Howie wrote:

Can anyone tell me how to treat white flies in my ash trees. They are
everywhere. Thanks Howie