[vegmandan]

Yet again I have got red spider mite on my butternut squash plant leaves and they are shrivelling before my eyes.

As they are in a polytunnel with other plants, I can't really raise the temperature and humidity to help them as the other things wouldn't like it.

Is there any pesticide on the market which might work ?

Any thoughts would be appreciated.

[Aunt Sally]

RHS have a list of sprays at the bottom of this fact sheet:

http://www.rhs.org.uk/advice/profiles0601/red_spider_mite.asp

[gobs]

Could try these, not cheap though

Otherwise, destroy plants. There are no effective treatments available to gardeners, besides, these contribute to resistance developing as them mites breed at a fast rate.

Prevention, prevention, disinfect poly for next year and spray plant with pure water as often as you can, twice a day is ideal, but I find, much less fequent still works with shading and ventillation.

[Noah'strolly]

As I said in another thread, my cucumber has just died from spider mites. Bifenthrin got rid of them for a while but when I got back from a fortnight away they were back in force.
This is an ongoing problem as the tomatoes I had last year were killed by spidermites. They are in my conservatory which, until now, made a great greenhouse. I've read that they can hibernate over winter in soil or cracks in walls. I'd like to get rid of them but can't see myself fumigating the house or anything like that. I have several other, tougher leaved, plants in the conservatory which seem to be pretty imune to the mites but I know they are probably carring them so I'm quarentining the room. Any suggestions would be welcome.