[colin120]

Are white fly harmful noticed just a few on my potato leaves told to spray with water mixed with washing up liquid, then again in five days is this correct ?

Cheers

[Yorkie]

I wouldn't bother.  They'll land again after you've sprayed and they do no real harm.

[mumofstig]

This was discussed recently here

http://chat.allotment-garden.org/index.php?topic=115567.msg1332894#msg1332894

[colin120]

Ok thanks I wont worry about them then