Potato blight??

Can't identify that mould? Got a great tip for keeping slugs at bay? Suggestions for organic weed control? Post them here...

Moderators: KG Steve, Chantal, Tigger, peter

HelenH
KG Regular
Posts: 61
Joined: Sun Jan 22, 2006 8:19 am
Location: Newcastle under Lyme, Staffordshire
x 6

Potato blight??

Postby HelenH » Tue Jun 02, 2020 8:13 am

Is this the dreaded blight? Do I need to cut the foliage off? They're first earlies grown in potato bags.

download/file.php?mode=view&id=5710
Attachments
2020-06-02 07.38.40.jpg
2020-06-02 07.38.40.jpg (5.45 MiB) Viewed 1421 times
0 x
User avatar
Compo
KG Regular
Posts: 1385
Joined: Thu Mar 16, 2006 8:58 pm
Location: Somerset
x 117

Re: Potato blight??

Postby Compo » Tue Jun 02, 2020 12:55 pm

Have you had humid weather?
1 x
If I am not on the plot, I am not happy.........
HelenH
KG Regular
Posts: 61
Joined: Sun Jan 22, 2006 8:19 am
Location: Newcastle under Lyme, Staffordshire
x 6

Re: Potato blight??

Postby HelenH » Tue Jun 02, 2020 1:06 pm

No, just dry ... sunny ... Watered the potatoes well though.
0 x
Stephen
KG Regular
Posts: 1589
Joined: Thu Feb 14, 2008 4:03 pm
Location: Butts Meadow, Berkhamsted
x 646

Re: Potato blight??

Postby Stephen » Tue Jun 02, 2020 5:38 pm

Helen, forgive me if you already know this but don't water with a sprinkler or a rose on your watering can. This creates the humidity for blight. I also only water spuds in the evening so the water soaks in rather than the heat of the sun creating evaporation and thus the same humidity between leaves and soil.
1 x
Nothing is foolproof to a sufficiently talented fool.
HelenH
KG Regular
Posts: 61
Joined: Sun Jan 22, 2006 8:19 am
Location: Newcastle under Lyme, Staffordshire
x 6

Re: Potato blight??

Postby HelenH » Tue Jun 02, 2020 6:30 pm

Stephen, that's obviously where I've gone wrong. I have used the spray gun on my hose and given them a good soaking, all over! I've not yet checked to see if the potatoes are ready, but I'm thinking any time soon. Is there anything I can do to resolve the problem?
0 x
User avatar
Geoff
KG Regular
Posts: 5087
Joined: Thu Nov 24, 2005 5:33 pm
Location: Forest of Bowland
x 830

Re: Potato blight??

Postby Geoff » Tue Jun 02, 2020 8:03 pm

I'm not convinced your potatoes have got blight, having said that I haven't got an alternative explanation for the blotches.

Blight tends to be paler, have sort of rings in it and makes the leaves soft whereas yours still look quite stiff.

download.jpg
download.jpg (9.05 KiB) Viewed 1368 times


I wouldn't panic too much unless it starts spreading down the leaves into the stems and making them collapse.
0 x
Stephen
KG Regular
Posts: 1589
Joined: Thu Feb 14, 2008 4:03 pm
Location: Butts Meadow, Berkhamsted
x 646

Re: Potato blight??

Postby Stephen » Tue Jun 02, 2020 8:33 pm

I would agree.
As it says in the book - don't panic.
1 x
Nothing is foolproof to a sufficiently talented fool.
HelenH
KG Regular
Posts: 61
Joined: Sun Jan 22, 2006 8:19 am
Location: Newcastle under Lyme, Staffordshire
x 6

Re: Potato blight??

Postby HelenH » Tue Jun 02, 2020 9:15 pm

Many thanks guys
1 x
User avatar
Muddyboot68
KG Regular
Posts: 36
Joined: Sun Apr 28, 2019 8:03 pm
Location: Forest of Dean
x 9

Re: Potato blight??

Postby Muddyboot68 » Wed Jun 03, 2020 6:38 pm

Geoff wrote:I'm not convinced your potatoes have got blight, having said that I haven't got an alternative explanation for the blotches.

Blight tends to be paler, have sort of rings in it and makes the leaves soft whereas yours still look quite stiff.

download.jpg

I wouldn't panic too much unless it starts spreading down the leaves into the stems and making them collapse.


I agree with Geoff. pick off the affected foliage and see what happens!!
0 x
User avatar
Cider Boys
KG Regular
Posts: 849
Joined: Sun Mar 05, 2006 6:03 pm
Location: Somerset
x 35

Re: Potato blight??

Postby Cider Boys » Wed Jun 03, 2020 8:08 pm

If I had to make a presumption at the very worst I would suggest that it may be a possible strain of mosaic virus exacerbated by the recent hot weather, but let's hope that it isn't. Did you plant certified seed potatoes? Most likely since you say that you are growing them in a pot/bag is that it could well be just a magnesium deficiency so try spraying with Epson salts; it is a little early for blight.

Barney
1 x

Return to “Weeds, Pests and Diseases”

Who is online

Users browsing this forum: No registered users and 6 guests