Is This A Fungus?

Inailum · Mon May 23, 2011 1:51 pm

Is this a fungus on my cucumbers?

[img]https://i3.photobucket.com/albums/y64/inailum/Garden/DSC03714.jpg[/img]

veteran · Mon May 23, 2011 2:07 pm

Inailum wrote:Is this a fungus on my cucumbers?

-- Probably mites, did you check the underside of the leaves? Many pests cause a chlorophyll depletion which makes the leaves look like this.

OrganicTexasMama · Sun May 29, 2011 1:19 am

Are the white spots visible on the under side of the leaves, too? I've had this in my zucchini for a week or two now. I'm not sure what's causing it, though it seems to be the least of my worries with these plants.

Are yours having any other issues? I know I've seen soil mites but I haven't noticed anything else (other than little black ants, but no aphids). I'm not sure if I've got a case of fungus going on (black patches) or something more insidious like SVB.

I've done various treatments for fungus and bugs and they're still alive.. but I'm not sure they're thriving.

Francis Barnswallow · Sun May 29, 2011 12:37 pm

My cuke and tomato leaves look like that too.

Kisal · Sun May 29, 2011 1:27 pm

Fungi tend to grow on the surface of a leaf, so if the spots are removed or lightened when you rub a finger across the leaf, a fungal treatment might help. I will say, though, that it doesn't look like fungus to me. IMO, it looks more like a bacterial or viral infection. I'm not familiar with the foliar diseases of cukes, so I can't name anything specific without looking them up.

It easily could be damage caused by some kind of mite, but it doesn't quite look right for that, either.

Inailum · Mon Jun 06, 2011 7:27 pm

Kisal wrote:Fungi tend to grow on the surface of a leaf, so if the spots are removed or lightened when you rub a finger across the leaf, a fungal treatment might help. I will say, though, that it doesn't look like fungus to me. IMO, it looks more like a bacterial or viral infection. I'm not familiar with the foliar diseases of cukes, so I can't name anything specific without looking them up.

It easily could be damage caused by some kind of mite, but it doesn't quite look right for that, either.

Sorry for the delayed reply, I have been super busy for the past couple weeks. Anyway, the spots do not rub off when I run my finger over them. I spray Neem Oil on them every week or every other week. It seems its not affecting their growth, I have like 10 cucumbers on each plant. I just dunno.