"Janice" wrote in message
...
Some plants in my greenhouse have whitefly, as do some of my outside
garden
plants. Do the whitefly need getting rid of (insecticidal soap) or will
it
they simply die off naturally with the coming colder weather?

Thanks.
Don't know how you feel about sprays - our melon plants were badly infested.
We used a systemic spray in May. It only affects insects that attack the
plant - harmless to bees, hoverflies etc.
We have had zero whitefly since.