[chili]

is it alright to use any kind of washing up liquid and water to try and get rid of whitefly? i have some PSB growing quite happily now but these little moth type things have decided to move into them, i have just aguired some pukka debris netting but would like to try and get rid of these flies.
if soapy water is ok how much soap to say a watering can full of water do i use?

thanks

[Trillium]

Since I'm in Canada, I can tell you that I use a good squirt of liquid soap to roughly a litre/quart of water. Cool water is better as hot water causes lots of troublesome bubbles. I soak the trouble areas well and reapply if it rains. It takes a few times to get rid of most of my pests. For a watering can, I just use a litre container mix and keep dumping it into the watering can so I know I have enough soap but not overly much.

[chili]

many thanks

[SUTTY1]

IN my experience i think you better to spray the mixture(agree on dilution rate) on the underside of the leaves were the little devils live. Watering over the top nowhere near as effective

[SUTTY1]

meant to say that if you havnt netted yet. Spray for a couple off weeks to reduce whitefly, then as cabbagewhite butterfly will have died off, cover with a open nett to keep the birds off. For me in last 2yrs whitefly seem to have thrived under debris net(sheltered environment)

[Kristen]

My Brassicas are covered in whitefly too. Is soapy water really much good with them? I thought that was more suitable for Aphids due to the effect on thin skins etc If its any good on Whitefly I'll definitely give it a go.

Any idea how much damage will the whitefly do if left alone?

[DD.]

I sprayed the whitefly time & time again with soapy water last year.

All I got was very clean whitefly.