I am trying to grow borage, nasturtiums & pot marigolds together for wildlife and because the colours look gorgeous together. But some lurgy is taking over my borage, the leaves are becoming blistered and discoloured. Can anyone suggest what is wrong? There are ants on the plants, would they be causing this? No sign of caterpillars or any other pests. The plants are flowering & the flowers, stems etc look OK. First pic is the top side of the leaves, second is the underside.
How bad is the plant? If it's just a bit sickly, cut out the affected foliage, and get rid of it in the bin (not compost). Improve air circulation round the plant and maybe think about moving it to a less damp spot and it should recover. If it's gone into collapse mode, you may have to bin it, I'm afraid.
I'm not sure that it is powdery mildew, the bits which look white in the photo are actually very thin & papery, the plants are in a south facing spot which is sunny with good air circulation (similar site to other plants in nearby houses which are looking 100% healthy )
Thank you - Yes - some of the images do look a lot like my plant. I'm a bit puzzled by the rest of the plant remaining healthy though (leaves have been doing this for a couple of weeks now) I will assume a fungus, isolate the plants & if no improvement they'll have to be binned
I think it looks like leaf miners, little critters that live inside the leaf and eat tunnels. If you tear a leaf open sort of across the damaged bit you might see the little thing - looks a bit maggoty.
Felyne I think you have got it - I had another look at the leaves I picked off, the papery bits lift off and there are a few little white maggoty things wiggling around between the leaf layers. So I may destroy the worst infested plant but others may get away with having a few leaves removed. Thanks so much!
Yes there are no wiggly lines at all which is why I didn't think about leaf miners myself. Thanks for your input shovetheholly the borage is actually looking OK now that I have picked the affected leaves off although one of the plants has no leaves at all...
My beetroot have it too, although this thread has made me realise that I strangely have no borage this year (I planted one plant about 5 years ago and it has self-seeded happily ever since!) I put the flowers in ice cubes for posh pimms