Hi Trapper,

Are you growing any edibles in the greenhouse? You can treat inedible plants (like ornamentals -- zinnias for example) with systemic insecticides. This is a link to a helpful article on the subject. Whitefly Solutions

ZM

and are you sure they are not fungus gnats.. etc ... or are we to presume your ID is correct ...

your GH is heated in z5 this time of year???? .. aka ... more info please ...

ken

Are you growing any edibles in the greenhouse?

For the most part, it's annual flowers....... I do have a couple tomato plants, but I could treat them separately..... At this point the only affected plants I'm seeing are the much beleaguered Benary Giants that I've posted about....... Oh the irony :)

I'm all in for the systemic insecticide........ Keep your fingers crossed!

Life is rife with strife..... First it was my beloved Jayhawks having their 51 home game winning streak broken Saturday, only to discover Whiteflies in my GH...... :(