Anybody recognize these spots ?

Looks like Downy.

It looks like leaf spot fungus, if its everywhere, you got it bad! Try Tbs baking soda/gallon water and foliar. It breeds in moist climates without proper air flow it flourishes

deacon1503 said:

Looks like Downy.

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Doesn't look like mold to me

Are you applying any foliar sprays?

is that mold on your mains down low? I cant really see but it looks to me like there is a white powder the first 4 or so inches but maybe it's the pic.

No other mold looking stuff anywhere on the plants, I have tried different foliar sprays mg, diluted nutes ect., asprin always the same old shi!

MysteryChild said:

Doesn't look like mold to me

Are you applying any foliar sprays?

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Downy mildew produces irregular tan spots not congruent to nutrient deficiencies. Foliar with Physan 20 @ 5 ml/g. If u don't I bet the spots turn from tan to grey. Check out downy mildew on cucumis sativus, it's looks identical.

Downy = Mold
I see tan spots but where is the mold?
I'm sure he looked on the undersides of the leaves and noticed no hairy like material

Hey budfarmer, have you checked the undersides of the leaves?

To me it looks like the result of foliar sprays without a wetting agent... looks like the footprint of water beads!

I did look under the leaves they don't have any sign of fungus or anything else, I use 1 drop of Dawn dish soap in foliar sprays, I will read up on Downy Mildew that just might be what this is.

And may i ask why do you add dawn dish soap to your foliar sprays :confused:

budfarmer said:

I did look under the leaves they don't have any sign of fungus or anything else, I use 1 drop of Dawn dish soap in foliar sprays, I will read up on Downy Mildew that just might be what this is.

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Does the water bead off/on the leaves? One drop per how much water/solution? That might not be enough. And are you spraying with the lights on? Not enough wetting agent/surfactant + spraying with lights on = burns. The spots really look like water droplets where the water would 'bead' but not run off, hence, burns.

When I look at the pics, the spots are in areas where the water would bead and accumulate.. for example, no spots on the ends of the leaves where the beads would run off, and accumulation on the flat surfaces near the petioles, as well as burns on the serrations of the edges of the leaves where beads would also accumulate. It could be not only from spraying with lights on with not enough surfactant, but also spraying with too potent of a solution, with or without the lights on.

MysteryChild said:

And may i ask why do you add dawn dish soap to your foliar sprays :confused:

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A lot of people use dish soap as a surfactant. Soap is a surfactant that breaks/lowers the surface tension of water, thus coating the foliage more evenly and reducing or eliminating the 'beading' effect.

Physan 20 might be worth a try I have tried everything else.

@budfarmer -- if I'm understanding correctly you have *not* given any sort of foliar applications except in response to the spotting. If that is the case, then I think the issue of downy mildew that deacon is bringing up should be given primary consideration. If all that needs is dosing with some Physan 20, then that's not bad in my world. I have experience with Septoria (black spot) and that requires cupric treatments, repeated.

On that note, I'll suggest that you learn about downy mildew and how it's vectored. Septoria is vectored mostly by splashing water, so part of the treatment program includes removing infected leaves and never splashing water when watering or feeding.

Also, a note about Dawn--it's not a true soap, it's a detergent. I suggest getting a true soap like Dr Bronner's (castile soap) and using that instead. For one thing, that's what will be effective in preventing crap like spider mites because it is only true soaps that will remove the waxy cuticle layer on their exoskeletons, thus exposing them to dehydration and desiccation.

Myco said:

Does the water bead off/on the leaves? One drop per how much water/solution? That might not be enough. And are you spraying with the lights on? Not enough wetting agent/surfactant + spraying with lights on = burns. The spots really look like water droplets where the water would 'bead' but not run off, hence, burns.

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Water alone is not phototoxic, so if what we're observing are burns they would only be due to something like, say... CaCl.

I agree about the appearance, but I spray my own plants daily in full sun, I know that droplets of water, or even water with soap, do not cause burns. Same with JMS Stylet, the Sea-90 I like to use, etc, etc.

Thank you all and especially seamaiden, I read a blurb on downy mildew it said downy mildew actually spreads through water on the leaves so it is important to not get water on the leaves when watering the plant. Physan 20 is not readily available here so I'm going to just try to keep the leaves dry for now.

Perhaps a cupric solution would work for you, can you get something like, say... Kop-R-Safe? Physan 20 is a quaternary ammonium compound, look for quats or quaternary ammonium, it doesn't have to be specifically Ph-20.