Sulphur candle in polytunnel?

[kentvegplot]

Hi there, I'm getting conflicting advice about this so I thought I'd ask the experts (that's all you grapes)

Can I set off a sulphur candle in my empty polytunnel? I wouldn't normally even contemplate it, but I had a big pest problem this year and would like to erradicate the over-wintering RSM and whitefly if I can. I always scrub it out anyway, but I think drastic action might be called for

Anyone know what the dilute sulphuric acid does to the particular plastic used for tunnels?

Thanks in advance

KVP

[ken smith]

I think a sulphur candle would be wasted in a tunnel unless it is a small one. I use Provado for red spider and thrips but am hoplng the severe winter we are having will kill of any eggs overwintering

[jayjay giant]

Ken smith is right, this good cold snap should kill of a lot of bugs and diseases but a Sulphur candle will make sure. Just check the are it can be used for because I have a sneaky suspicion you will need more than one sulphur candle.

Good luck

JJ

[lynda66]

i have a sulphur hotbox, was about a tenner on ebay .... you put sulphur crystals in and leave it plugged in for 4 hours, and you can even use it when you're growing crops, .... although i would only use it if you get a severe problem, as it kills good bugs too xx