water spots on plants turn into white, HELP!

[SeaMaiden]

You confused?

It is in the warm and dry climate that the spores can cover so much ground.....Like the POLLEN of a plant..sound familiar? Thats why you are associating dry with mold/mildew.


The cucurbits are known to be weak to the DOWNEY MILDEW, wich, is NOT
The same as POWDERY MILDEW.

And You HAVE TO HAVE moisture to GROW THE MILDEW/MOLD.

you should know this, it may help save your purty gardens one day!

I don't think I'm the one who's confused. Do you know the difference between powdery and downy mildew? I do. Are you familiar with my observations on my land with my plants? Because I am.

I also read, quite a lot. Perhaps you might want to learn more about the various PM fungi that exist, and in what conditions they may occur.

 

[Zdub7k]

ok I mispoke, you are correct..it doesnt cause it..but moisture is necessary for mildew to grow...all kinds of fungus for that matter....this isnt supposed to be an argument...Im just trying to help him cure his problem, and so far through two pages, Im the only one thats actually offered up a suggestion for a solution. ICan we all agree that it looks like fungus of some sort? be it mold, or any form of mildew.....actinovate should kill it...bam...dead in its tracks, and then use it for a preventative once you got it reigned in.

 

[Phantomx]

PM likes warm and humid(high RH) weather, but it doesn't like water.

 

[Obsidian]

it's the minerals in the water left over after the water evaporating.
just crystals precipitating from the hard water.
that's why the rainbow sheen.

Not mold or fungus.

 

[SeaMaiden]

Can you look at that under a microscope? It's not like any powdery mildew I personally have ever seen, but I see what you're saying. Could it be transpiration-based, I'm wondering..?? Someone here was talking about this effect where droplets can form on the edges of the leaves of plants when VPD hits a certain point, and the next day after I read it (I can't remember the term!) I observed it on some pumpkins. It never caused anything else to happen, though.

What if you just moved the plant? Or can you move it?

I would try spraying with a mix of either isopropyl alcohol:water at a 50:50 ratio, or hydrogen peroxide mixed with water at a rate of 15mls/gal (1 tablespoon). I've actually just sprayed straight 3% H2O2 on my plants, but I'd feel awful if you burned your girl doing that. Then again, maybe you have nothing to lose by trying it, eh?

ok I mispoke, you are correct..it doesnt cause it..but moisture is necessary for mildew to grow...all kinds of fungus for that matter....this isnt supposed to be an argument...Im just trying to help him cure his problem, and so far through two pages, Im the only one thats actually offered up a suggestion for a solution. ICan we all agree that it looks like fungus of some sort? be it mold, or any form of mildew.....actinovate should kill it...bam...dead in its tracks, and then use it for a preventative once you got it reigned in.

I agree that he's experiencing a subsequent fungus, I just don't know what the original wet spots and subsequent white stuff is, so can't presume to tell him. I did, however, offer some solutions I thought.

it's the minerals in the water left over after the water evaporating.
just crystals precipitating from the hard water.
that's why the rainbow sheen.

Not mold or fungus.

What do you think is causing the water? I can't remember the term for water droplets building up on leaf margins, but there is a specific point of temperatures and relative humidity when this happens that, I think is not directly associated with just dew point. IIRC it tends to happen when it's hot, and even sunny out. (I really wish I could remember the terminology here, I apologize for that.)

He did mention that he's at least experienced tissue-killing mold or fungus subsequent to this occurrence. Not necessarily an ipso facto dealio, but perhaps the moisture itself is relatively innocuous, but what it causes from that point on isn't. How can it be resolved?

 

[Kcar]

It's bird poop. Or pee. (leaked through poo)

 

[Zdub7k]

Im sorry I didnt mean to come off rude, Your correct you did offer potential solutions, but to answer your questions..I would start by eliminating possibilities...maybe hang a sheet of plastic or something over the plants so that your sure its not something dripping on.... then treat it for fungus...seeing how there not much he can do to control RH levels or temps...maybe some more shade during the day if you think its associated with heat...start the process of elimination.

 

[420Baker]

It's bird poop. Don't lick it.

I agree poop bird guano lol

 

[skullznroses]

I agree that he's experiencing a subsequent fungus, I just don't know what the original wet spots and subsequent white stuff is, so can't presume to tell him. I did, however, offer some solutions I thought.

What do you think is causing the water? I can't remember the term for water droplets building up on leaf margins, but there is a specific point of temperatures and relative humidity when this happens that, I think is not directly associated with just dew point. IIRC it tends to happen when it's hot, and even sunny out. (I really wish I could remember the terminology here, I apologize for that.)

He did mention that he's at least experienced tissue-killing mold or fungus subsequent to this occurrence. Not necessarily an ipso facto dealio, but perhaps the moisture itself is relatively innocuous, but what it causes from that point on isn't. How can it be resolved?

The term you are looking for is most likely WET BULB Temperature?

yes somatic evapotranspiration is a real phenomenon, and under the right conditions it could theoretically condense on the leaf after it has left the plant, but you would ned another microclimate above the plant... like say a balcony shielding the sun, Hmmm

 

[Sat X RB]

Oh Fuck, y'all! no one's keepin it simple and mentioned DEW!

it's the furkin DEW dripping off the drainpipe carrying with it dissolved oxidised paint the drain pipe is painted with!!!

maybe I was too cute in the first place but I was waiting for Greenhaus to realise this himself ... but it seems Mr Green does not get up early enuf to notice such natural phenomenon as DEW.

if you get up really EARLY Mr Green you will probably be able to see the droplets waiting to fall on yr admirable plants.

cheers!

 

[ahefferman]

The plant is sweating. Just like you and I. If we sweat a lot do we not leave a white stain on our shirts?