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At what low temperature do bugs die ?
Posted: Tue Oct 25, 2016 5:33 pm
by Primrose
Just asking because my leeks have been infested with a plague of tiny black flies (not the kind of blackflies that zoom onto nastursiums) and I've been spraying with soapy water in an attemot to kill them off. They have now also totally wrecked all my bunching onions as well
I was hoping that colder nights would finish them off but to date they're still hanging on. I hope they're not as resilient as whitefly which seem to continue hovering round my greens nd especially my curly kale at low temperatures which would have me running for a fleece and a hot water bottle !
Re: At what low temperature do bugs die ?
Posted: Tue Oct 25, 2016 6:25 pm
by Geoff
Pretty sure at -273 but not confident above that.
Re: At what low temperature do bugs die ?
Posted: Tue Oct 25, 2016 7:25 pm
by Pawty
Hi primrose,
I have the same problem on chives and leeks. I posted a picture a while back - copied below. (Sorry about the quality but gives an idea) Does anyone know when they are? I've cut them back and sprayed, but they have returned - I have the same concerns about not getting rid of them!
Pawty
Re: At what low temperature do bugs die ?
Posted: Tue Oct 25, 2016 7:28 pm
by Diane
Could be pollen beetles.
Re: At what low temperature do bugs die ?
Posted: Tue Oct 25, 2016 7:54 pm
by Westi
Doubt it's cold enough consistently to kill anything off at the moment! Chilly mornings then nice sunny evenings down here - if the bugs tucker down they will survive!
A bit early still to expect the end of these tiresome pests, but expect these black guys will go at some point but someone has to have a solution to the whitefly which could probably be nuked & still come back!
Westi
Re: At what low temperature do bugs die ?
Posted: Tue Oct 25, 2016 8:20 pm
by Primrose
Yes Pawty. Exactly the same creatures as on my leeks and bunching onions. It seems incredible to believe but I've never noticed them before all the years I've been growing them and am worried that now they've arrived I'm going to plagued with them in future years. I'm not aware of any insect that specifically breeds on the allium family . It must be something to do with the allium smell though that perhaps attracts them as they don't seem to be on any of my other vegs.
Re: At what low temperature do bugs die ?
Posted: Wed Oct 26, 2016 7:41 am
by Pawty
I wonder if this Is this a question for team KG now I.e bug identification ? I'll try and get some time is evening to look back though my magazines.
Pawty
Re: At what low temperature do bugs die ?
Posted: Wed Oct 26, 2016 8:30 am
by Pa Snip
Re: At what low temperature do bugs die ?
Posted: Thu Oct 27, 2016 10:24 am
by KG Steve
Some of the bugs in the picture look like aphids Pawty, but if you could send me the original image I might be able to have a better stab at identifying them -
sott@mortons.co.uk
Re: At what low temperature do bugs die ?
Posted: Thu Oct 27, 2016 10:33 am
by Primrose
I'd be really grateful for an identification too. Two rows of my bunching onions (which I've had for over 20 years) have been pretty much destroyed by them, and my leeks are very sickly this year.
Re: At what low temperature do bugs die ?
Posted: Thu Oct 27, 2016 10:37 am
by Primrose
Pa, I loved the black furry caterpillar in the video clip. Reminded me of when I was a child and used to see lots of them and adopted a few as pets in jam jars ! . Strangely I haven't seen one of them for years now and wonder what butterfly they were associated with. The main ones I see are the common yobs - the cabbage whites which despite our apparently diminishing butterfly numbers seem to still thrive in my garden.
Re: At what low temperature do bugs die ?
Posted: Thu Oct 27, 2016 11:36 am
by Pa Snip
was only remarking on the plot a few months back how few cabbage whites there were around this year
hardly seen any other butterflies either
Re: At what low temperature do bugs die ?
Posted: Thu Oct 27, 2016 12:00 pm
by Primrose
You sent them all over here, that's why!

Re: At what low temperature do bugs die ?
Posted: Thu Oct 27, 2016 12:44 pm
by Pa Snip
Re: At what low temperature do bugs die ?
Posted: Thu Oct 27, 2016 5:33 pm
by robo
No shortage of cabbage whites on our allotment they come over in droves over thirty at a time, we blame the surrounding wild fields we also blame them for the rats which we have in abundance and lately hitting bugs that get in every nook and cranny of the human body or in my case nearly human body