Whitefly on a tumbling tomato in GH

[Containergardener]

The other day I noticed whitefly on a tumbler (gifted plant) , I removed it and blasted it outside. As yet I haven't seen anymore but how can I prevent them?
I do tend to keep the door open all day if warm enough .

[burnie]

I use a spray of diluted washing up liquid both as a treatment and a deterrent, I also leave the spiders webs to develop in the greenhouse as a natural trap, you can use those rolls of sticky tape like traps as well.

[Containergardener]

Thanks Burnie

[Jungle Jane]

I saw one & squashed it by my potatoes,I’ve put a French marigold where it was to deter any more. They won’t nest next to a marigold.

[Containergardener]

[Containergardener]

[bramble]

I grow a marigold alongside each tomato plant.
I havnt had whitefly in years and swear by them.

[Containergardener]

I'm going to pop to local garden centre this morning to see if they have some , it's by the vet where I'm picking meds up anyway ..that's my excuse .
Thanks

[Containergardener]

Got some and they're now in the GH