Water Causing Burns on Plant Leaves, a Myth?

J

jack ripa

Active Member
Lets settle this once and for all. In nature it rains. That water sits on leaves and the sun comes out. Sometimes very brilliantly. Plants in nature don't just burn the hell up from this. I postulate that this is a myth and if I am to believe I am wrong, please, someone show me some actual evidence.

I am willing to admit when I am wrong but this idea is so out there...

Clean water, cooled lights at proper distance with decent ventilation, NEVER seen it happen. I have seen things I mistook for burning from nutrient solution but most of those turned out to be early warnings of nutrient deficiencies that I ignored and began to spread.

So, anyone, show me, not pics of your "water burns" but actual shots of you attempting to and successfully burning a plant leaf with water. Or, show me one peer reviewed paper that demonstrates this effect. Convince me, please so that if I am wrong I can stop spreading misinformation. If no one does this I will do it. I will take one plant and mist it twice a day during lights on and we will see what king of burning a 1kw can do at 12 inches.

I will say this, if you are to mist constantly, your plants leaves will spot up. That is because the water has heavy elements that begin to dry and peel the leaf surface. Think about how birdshit on the hood of a car can eat through the wax and even burn the paint in a spot. That is my experience and I am sticking to it unless someone can show me I am wrong.
 
J

jack ripa

Active Member
Now, if you took a plant from weak light to strong light and put a bunch of water on it, yeah, that could do it. If you brought a 1kw from 24 to 8 inches and sprayed the plant, yeah, that could do it too. But if you are not doing these things and the plant is properly hardened to it's environment, it won't happen.
 
jesus of Cannabis

jesus of Cannabis

:-)
I think he just made the first post to use the word postulate cause it reminds him of prostate.
How far away are the grow lights from their plants underneath?
How far away is the sun and its "Brilliantly" shining days?

+rep for fragmented sentences for the OP



NOT
 
jesus of Cannabis

jesus of Cannabis

:-)
leaves that have small wax hairs are susceptible to leaf burn as hairs on the surface holds water droplets in focus acting as a magnifying glass.
 
J

jack ripa

Active Member
I am not sure why I am being attacked, I guess conformity is highly valued.

That article, while dubious, is really not proof of what we are talking about. I understand refraction and I can see that a dry forest floor and a water droplet above could cause fire in extreme heat and the perfect conditions. That's really not what this post is about. I know how a magnifying glass works, you have to lift it to a certain height to burn anything below to concentrate the apex of the focal planes. It's not that hard to figure out. But, if you take a drop of water, place it on a leaf and apply light, you will not get a burn. The water is too close and cooling, lets not forget, as well as the fact that the plant is absorbing a certain amount of the water and light.

Please, let's not be insulting. I genuinely want to know. If you don't have some article about the actual subject, don't expect to change my mind here.

How about this? I will disprove this old myth myself. Hey, maybe it will backfire on me. I will share my results either way. Sound fair?
 
J

jack ripa

Active Member
I am not doubting that a lens can concentrate light to burn, duh. I could see that water suspended above the plant leaf could burn it. Ok a hair might be able to do this. But then the water evaporates so fast at that level and, scaled down the effect is much less. Also, being suspended on a hair would deform the lens and make it even less effective. Please let's not demonstrate basic concepts in physics here. Let me see proof of water doing this to an MJ plant.

In 25 years of growing pot I have never seen it. Am I lucky? Do I just always have enough ventilation and air turbulence? Maybe so. I will see if I can replicate the perfect water burning environment to produce the effect.
 
ChubbySoap

ChubbySoap

Well-Known Member
i wasn't attacking...i was pointing out most web engines find a bit regarding the matter...and the scientific community has moved along is all
i don't even mind you dismiss it out of hand either...it's okay by me.

sure, i got no beef with you conducting your own, no doubt, much more rigorous and thorough, testing....

o_O
I won't lie...I'm eager to hear your reports
 
J

jack ripa

Active Member
Look, I am sure under certain circumstances, water can cause problems on leaves. But telling everyone who mists their plants (many under cfls) that they can burn their plants, is dead wrong. Plants love it. Don't overdo it but they do like it. I would never foliar feed in the light cycle.

Please, if these studies are so prevalent, produce them. I will produce one that discounts it for everyone you can find. Let's see what kind of (proven) credentials and peer review we can muster on this.
 
J

jack ripa

Active Member
Below is the "attack" I was referring to.
jesus of Cannabis said:
I think he just made the first post to use the word postulate cause it reminds him of prostate.
How far away are the grow lights from their plants underneath?
How far away is the sun and its "Brilliantly" shining days?

+rep for fragmented sentences for the OP



NOT
Click to expand...
 
J

jack ripa

Active Member
From the above article.

There are many causes of leaf scorch, but irrigation with fresh water is certainly not one of them.
Hundreds of scientific publications on crop plants, turf, woody shrubs and trees have examined foliar
scorch, and not one of them has implicated midday irrigation as a causal agent. What does cause damage,
however, is suboptimal plant-water relations, which can result in tip and marginal leaf scorch, shoot
dieback, stunted growth, and leaf abscission. After drought, the most common source of these problems
is salt, in particular salts containing sodium (Na) and/or chlorine (Cl).
 
ChubbySoap

ChubbySoap

Well-Known Member
well...at least you're honest....you just want to argue.
every one i produce you will match with a patriot missile...okie dokie.

the problem here is that you alone get to decide what valid proof consists of, yet you seem to have no obligation to set out on the table your defining criteria beforehand...
there's no way to play your game my man...you got to at least give the impression there is a slim chance you can be bested...ya know?

it's not bad to mist them...they love it....unless you overdo it...
thanks for helping clarify the misconception
 
J

jack ripa

Active Member
ChubbySoap said:
well...at least you're honest....you just want to argue.
every one i produce you will match with a patriot missile...okie dokie.

the problem here is that you alone get to decide what valid proof consists of, yet you seem to have no obligation to set out on the table your defining criteria beforehand...
there's no way to play your game my man...you got to at least give the impression there is a slim chance you can be bested...ya know?

it's not bad to mist them...they love it....unless you overdo it...
thanks for helping clarify the misconception
Click to expand...
I have posted a PHD article that refers to actual studies. You have posted nothing. If this is just an ego thing then let it go. I AM indeed interested in arguing. After all, that's how science works. hypothesis, study, findings, peer review.

So, let's see your countering studies. The vast majority of the science community agrees with me. You just have hearsay.
 
J

jack ripa

Active Member
I have lived and worked on commercial farms all my life. Farmers often will irrigate with sprinklers in the late afternoon so that less of the water evaporates to cool the crops more. If the water burning was a fact, they would stop that practice due to losses.

Maybe MJ is special. I am open to that. This is why I think it's important to debate this here.
 
You must log in or register to reply here.
Top