Has there been a good scientific study?

[DevinsDad]

Everyone points fingers at led lights, light leaks, other improper conditions, but has there been any real documented proof about any of that causing hermies?

You know some people believe that a woman can be born inside a mans body, You could kind of think of it that way maybe. Perhaps some seeds are just destined to be confused....

I mean I do completely grasp how people say that during flowering the plant will revert to veg.but not seeing how.will make a female plant change sex. maybe that light exposed plant would already have gone hermie. I think someone needs to do 10-20 plants with a slight light leak, and 10-20 plants with no leak at all. Using all seeds from the same pack.

Any thoughts, comments?

 

[al70]

do it man.

 

[al70]

do it man.

try finding the answer before looking for the answer

 

[DevinsDad]

do it man.

if i had a setup with enough space to have 10, in complete darkness, and 10 with different amounts and types of lights peeking in, and had 20 seeds from a mother, so they are all as close to the same as possible.

try finding the answer before looking for the answer

i did, i ran thru google, and icmag but everyone seems to assume that light leaks can cause a hermie, im wondering if its just genetics, not really sure how reflective light can cause a hermie, the moon is reflective light and it does not effect outdoor grows.

 

[al70]

too deep???what are you tryin to achieve???

 

[al70]

too deep???what are you tryin to achieve???

no offence, just interested

 

[gloryoskie]

I was told male expression in cannabis is the suppression
of femaleness, hence the ability to make a male thru
various means, light stress being one of them.

Good question, lest figure it out.

 

[DevinsDad]

too deep???what are you tryin to achieve???

no offence, just interested

Im not sure what this is a question of? Cant take offense if it makes no sense....

Too Deep? Whats too deep? maybe your too high? why you keep quoting yourself to post twice, say it all in one post.

Im trying to see if a flowering room really has to be 100% dark at night. Because it isnt easy to achieve in all locations. And in some cases its not even direct light, its light reflection, or a really low watt led like on a power block.

I doubt the tiny lights cause hermies, Im thinking its pre defined genetics.

 

[DevinsDad]

I was told male expression in cannabis is the suppression
of femaleness, hence the ability to make a male thru
various means, light stress being one of them.

Good question, lest figure it out.

I was under the impression that light stress will cause it to revert to veg state. Not that it will change sex. I think thats a myth. And one day I will test it if nobody else will.

If you can grow a successful sensimillafemale with a light of a power block in the room, or with reflection of light from another room.

 

[plato]

I wish you would.
I would love to have an actual answer, and you are right.
There are no actual test runs to prove this, only speculation, and tales of it happening to this or that guy. But there are also tales of it not happening to this or that other guy.
Maybe it is genetic, maybe it is not. I personally am not going to take the risk, but it seems like it would have to be genetically predisposed to be male, female, or herm. I mean a woman doesn't grow balls if she encounters some kinda f**ed up stress

 

[DevinsDad]

I wish you would.
I would love to have an actual answer, and you are right.
There are no actual test runs to prove this, only speculation, and tales of it happening to this or that guy. But there are also tales of it not happening to this or that other guy.
Maybe it is genetic, maybe it is not. I personally am not going to take the risk, but it seems like it would have to be genetically predisposed to be male, female, or herm. I mean a woman doesn't grow balls if she encounters some kinda f**ed up stress

Well I put the Idea up, In the next year or two Id test it. Cant now. Or for a little while. Hopefully if someone does it off my idea they show me some love.

 

[gloryoskie]

I was under the impression that light stress will cause it to revert to veg state. Not that it will change sex. I think thats a myth. And one day I will test it if nobody else will.

If you can grow a successful sensimillafemale with a light of a power block in the room, or with reflection of light from another room.

Lots of threads about light leaks and hermies, however,
genetics factor greatly in the predisposition.

If you have plants that tolerate light intrusion during
the "night" then you have a sturdy, stress free plant.

 

[RB56]

I've wondered about this too. It doesn't seem reasonable that the moon's existence would cause a plant to malfunction.

I can believe that significantly lengthening the daylight period can present a problem after a few days. Seems like the polluting light would have to be something close to the intensity of the intentional light.

I suspect most of this comes from timer failures. 12/12 turns into 24/0 and bad things happen. Next time male junk pops up, sure enough - the dehumidifier's empty pan light is on.

All conjecture. On the other hand, 100% light tight is always going to be better for security.

 

[latetothegame]

I personally am not going to take the risk, but it seems like it would have to be genetically predisposed to be male, female, or herm. I mean a woman doesn't grow balls if she encounters some kinda f**ed up stress

I have a Chemdawg 4 that threw a bunch of bananas under one bud last week, and there were not any light leaks. The only other stressors that plant had was my cat eating a few leaves, and maybe heat. I haven't seen any more since then, but I check every single day now.

 

[DevinsDad]

I've wondered about this too. It doesn't seem reasonable that the moon's existence would cause a plant to malfunction.

I can believe that significantly lengthening the daylight period can present a problem after a few days. Seems like the polluting light would have to be something close to the intensity of the intentional light.

I suspect most of this comes from timer failures. 12/12 turns into 24/0 and bad things happen. Next time male junk pops up, sure enough - the dehumidifier's empty pan light is on.

All conjecture. On the other hand, 100% light tight is always going to be better for security.

Lots of threads about light leaks and hermies, however,
genetics factor greatly in the predisposition.

If you have plants that tolerate light intrusion during
the "night" then you have a sturdy, stress free plant.

I have a Chemdawg 4 that threw a bunch of bananas under one bud last week, and there were not any light leaks. The only other stressors that plant had was my cat eating a few leaves, and maybe heat. I haven't seen any more since then, but I check every single day now.

@ RB56: Ive learned on the internet that the moon has no effect on the plants because it is indirect light and its like 0.0007 lumens or some shit. And that reflective light is no where near the same. Which is what made me wonder how a dim ass orange light on a power strip could cause hermie. or a light leak up high above the plants when your in a room beside the sleeping beauty's...Not direct light, and really not much light at all...

And i agree better for security. But if its in a basement or closet of your own home and nobody comes over except the Jehovahs witnesses, and the mailman. Im wondering if in the room beside it I turn on a tv and a pinhole of light pokes in, would that do it.

@gloryoskie: See thats what im looking for. I hear all over. Light leak caused a hermie. But I dont hear Light leak and all my girls stayed girls. I think people fear it to the point of not wanting to test it.

@lttg: Thats pretty beat. I hear its still decent smoke, and now you get some beans out the deal Nah heat wont, Arizona grows outdoors are over 100. that just stunts/slows growth.

 

[latetothegame]

@lttg: Thats pretty beat. I hear its still decent smoke, and now you get some beans out the deal Nah heat wont, Arizona grows outdoors are over 100. that just stunts/slows growth.

We'll see. I THINK I caught them before they spooged

 

[pappy masonjar]

DD- i can tell you that my first grow, i missed coverin a small red l.e.d. on a timer. And all of the plants that were directly in contact with that little ass light threw nanners. 4 different strains did this. seeded the room pretty good. i ran the same strains(exact clones) many times after covering the light and the plants never threw a nanner since.
i now occasionally stand in the flower room during dark to make sure its pitch.
light stress is just one thing that can cause a plant to herm, some plants will throw nanners without any stress. late in flower is when plants should be especially examined, as sometimes a plant,, if not pollinated will try and countiue its line by throwing male flowers to try and seed itself.
i wouldnt recomend the experiement as you will def end up with a bunch of seeds that are no good

 

[RB56]

I've had hermaphrodites under perfect conditions and none under poor conditions. The only constant I can identify is genetics. Lose the hermie prone strains and lose the hermies, in my experience.

It's impossible to know short of a controlled experiment. Even then, how much of what wavelength at what intensity? You'd really need a range of experiments to identify a problem.

One can conclude that light pollution during a single run was the issue. One can also conclude that standing on one foot during sunrise causes the sun to come up. No proof in either case.

 

[pappy masonjar]

your right, it was probably a total coincidence that JUST the plants around the stray lights hermed out, and NEVER did again without light irregularites. but u have ur opinion, i have mine.
DD- just know, that when you do your experiment, the seeds (and there will be plenty) will be super hermie prone. i did that 'experiment' too
anyways, just trying to offer My experience.

 

[Boffin]

so your idea of a good study is 10 plants and 10 for a control group (from SEED)? I don't think so.

I think it's quite simple. Stress = possible hermaphroditism. This has been scientifically discussed in a lot of plants and seems to be the same for cannabis.

Light leaks cause stress. Plain and simple. Depending on your plants ability to cope with stress and their tendency to herm. And the intensity of the stress caused (amount of light in this case) you might see male flowers or not.

IMO the moon and small light leaks that aren't too bright will usually not cause enough stress to do this.

I used to grow in a self built closet which was full of light leaks before I got myself a decent tent.
Since there was a grow room on 18/6 right next to it. Some of the plants received a little beam of light coming from a 100w cfl about 1-1,5m away.
It was very obvious that certain strains were way more prone to stress and herming than others. Also the ones closest to the light source would be showing most male flowers.
After fixing this I haven't seen a single male flower. These are all clones from the same strains!

Also hermaphrodite plants don't change from female to male. Genetically they just stay female although they are showing males flowers.

So as others have said as well. Genetics is a big factor. But stress WILL cause plants to herm if they're prone to it.