Well it's in the title... They were growing great but in the last days or so the leaves started wilting. They always showed some yellowing and I thought about nitrogen deficiency so I fed them with slurry but without success... Any tips?
I'm gonna go with either spider mites or fungus/bacteria. Probably the latter like one of the leaf spots or possibly downy mildew, though it seems a bit deep into summer for downy. That last picture has some pinpoints of color on the leaf that look like they could be spider mite damage, but I'd still put the safe money on a leaf spot. This far along, you'd be able to easily find them if they're there.
Get what you can from it all, maybe hit it with some neem once a week to see if that'll slow down the decline, but I think that's just gonna be cucurbit hospice.
Bummer.
I'm gonna go with either spider mites or fungus/bacteria. Probably the latter like one of the leaf spots or possibly downy mildew, though it seems a bit deep into summer for downy. That last picture has some pinpoints of color on the leaf that look like they could be spider mite damage, but I'd still put the safe money on a leaf spot. This far along, you'd be able to easily find them if they're there.
Get what you can from it all, maybe hit it with some neem once a week to see if that'll slow down the decline, but I think that's just gonna be cucurbit hospice.