UVb an experiment

Weezard,
Thanks for the quick responce. I realized that when I googled "insolation" is was giving me insulation. Once I figured that out I found it and saw it, it then dawned on me it was the spec that the photovoltaic panel people use.

I've gotten to the point where I need to make notes for my notes. :)

Khyber,
Thanks also for the responces, I'm not sure where I had come across this, but I must have been thinking about indoor light design at the time.

Hey Rusty
I just wanted to hit on a couple of things, since I got cut off the other day.
First, I forgot to say thanks for planting the seed in my mind to do this last experiment. From the time you mentioned it, it became all I'd think abt with UVb, use it thru out veg.
It seems I get surprised by at least something when I've done an experiment. Even tho I saw a thickening of leaves in my first experiment, I din't see any finished bud wgt gain (back to back UVb/no UVb during flower)). Going into this experitment, I was not looking for bud gain either, it was just there. Close obsevation with the eyeclops showed the small bud leafs (in the 3 strains that gained) where slightly larger and thicker, and the floweral bracks slightly larger.
A long time back I stated that the amounts of trichomes produced I believed to be generic. I would modify that now to say I think some strains can be influenced by UVb. But looking at the 2 strains that had no gain in produing more trics, it would seem that not all strains can be influenced. Seems that when we talk about growing mj, we always need to add the proviso "strain dependent".

Knna,
Going back over the math, it made more sence to me. When I had looked at the bulb specs originally I thought 50milliwatts was a very small amount but per centimeter squared was an extremely small area. Looking at the charts etc, I would guess (like I usually do) that the plants saw aprox a UV Index of abt 5.
OM

hey OM, on the strains that gained, what were there genetic makeup, sativa/indica/hybrids? i was just curoius if it correlates that way anyhow. with sativas being more equitorial and the indicas from the mountainous regions etc.


-shake

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Originally Posted by headshake

hey OM, on the strains that gained, what were there genetic makeup, sativa/indica/hybrids? i was just curoius if it correlates that way anyhow. with sativas being more equitorial and the indicas from the mountainous regions etc.
-shake

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Keeping in mind I have no $ for testing equipment, and have only one 10.0 CFL reptile bulb:
I was getting the impression (still have that impression) that the dominate pheno would determine whether a strain reacted positive or show no signs.
For instance, my favorite indica dominate reacts quickly...you might say 'violently' to the addition of UV light. Trichomes extend twords the leaftip quicker, leaves 'leather-up' and tend to curl and stunt yet no obvious loss in yield, odors increase...
But my favorite sativa dominate didn't seem to react at all. Plus, a mixed bag of results from various other strains of hybrids. Once I realized I was out of options to experiment further without having a baseline representative strain from each pheno, in my mind...it's a crap shoot for an average med gardener like me to go any further. Worth the toss of the dice, but no guarantee.

Close (under 1 foot) works best for those strains that react. But over time, would 6 inches be more of a benefit...? (more usable UV:M2) Would 2 feet be better...? (less UV:M2) Is fast and hard better, (6 inches, but only half-way through flowering) or is slow and steady (18 inches, but all through growth and flowering) the best...? Schedule for peak sunlight, or all day...?
And if the closer distance is better, is it because there is more of the "usable" UV bandwidth along the outer edges of the spectrums of light output by my particular bulb, and placing it closer increases this benefit, (inverse square law) or are the usable bands centered in my UV range, and my indica simply eats it up like candy...?

I also wonder what happens when you add UV in growth stage, but discontinue it in flower...? <doh> Sure wish I had more time to talk to the breeder when I last saw him. (the one that recommended I add the UV to my growth closet) His techniques are large-scale, (grows everything in both hydro and soil saying it provides different nuances to the flavors and effects) and I'm no threat to his cashflow, so am doubtful his insight was off. Nothing we talked about on other subjects was bogus, so am intrigued by his even mentioning it.

Ouch. My head hurts. <sigh>

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Originally Posted by Rusty Trichome

Ouch. My head hurts. <sigh>

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tell me about it!


-shake

Hello Shake and Rusty,

Let me start with what strains showed increase trichome production;
Shiva Skunk (from Sensi Seeds) Indica dom
PurePowerPlant (from Nirvana) Sativa dom
Cheese (was a freebe seed(s) from Attitude) Indica dom
All of these also showed minor increases in finished bud wgt.
I don't see a correlation to sativa/indica so far. But my head is starting to hurt too.
The plants that did not show gains in tric were the "apricot" and WhiteRhino. They are two extremes to each other in trichome production, one (WH) packs trics on top of each other, the "apricot" is so lean I throw the trimmings away.

I am not sure who produced the Cheese, since it was a freebe it was not in an original package, the others were. If you guys remember an older thread I did "selecting a mom", I did that with the ShivaSkunk. Not a heavy producer but tastes great. In the aero/fog tray setup it flowers in abt 42 days. That's what I really like abt it.

You know Rusty we all lack good test equipment, just take a look above or last page, with what Weezard is using; a light powered whirly gig! He's going to count and compare RPM of it both outdoors and his 285nm source. Now that's hi-tech for ya. Heck I've been using transition eyeglasses to determine the presents of UV or lack of it. I said earlier I want a light spectrum anylizer for Christmas, but no way I'll have the money. Well if I had the money there are other things I probably would buy. Wish I could get everyone who's viewed this thread to kick in for test equipment.:D

I remeber one time trying to wrap my head around something (you) Rusty said about growing in the heat. You said that your Indica doms faired better in the heat then the Sativa doms. That was competely opposite of what I would have thoght. But at this point I can't find a clear correlation between sat/ind strains, just that some reacted some did not.

As I said before, if I had to guess I think they saw UV Index levels of abt 5, maybe a little more. You do know Rusty, you are now talking abt intensities rather then wavelenghts?

OK, it's offical my head hurts too.
OM

OM, i would be down for kicking in some money for testing equipment.

wouldn't it make sense that indica doms do better in the heat as they are believed to orginate from the hindu kush mountain range are of the middle east. where as the sativas seem to be from around equatorial regions right? perhaps this also has to due with humidity?

just throwing out thoughts from a hurting head!


-shake

My opinion is that it's the difference in the genetic path that it's been bred to. Doubtful my PokerFace has adapted this quickly, over a short number of generations...so it must have SOME latent tolerance in it's genetic past. But obviously, the rest of the strains I grow are in the same boat (oven?) and adapt quickly, so PokerFace isn't the exception to the rule. Plus, there's no reason an indica dom can't have the heat (drought) tolerance mechanism of a sativa parent or grandparent. Or that a sativa dom can handle cooler temps. Heck...my Potent Purple won't begin to purple-up till around 60ish for a couple of weeks. It's become a post-Christmas Strain for me. (I just popped some Potent Purple seeds this week, as a matter of fact)

Most of our cannabis hybrids are from an overly diverse genepool with hidden (latent) expressions that can differ from sibling to sibling. Stuff like hollow versus pithy stems, trichome and capitulate stock patterns, leaf dimensions, ph tolerance, smell over effects (and vice-versa) can vary, even in F-2 and F-3 hybrids. With hybrids, it's a tougher game to play, scientifically speaking. Genetic hybridization is funny that way.

Mornin'

Dug our my germicidal and looked up the specs.
It's a 1' X 3' fused quartz tube.
G30T8
Bipin 30.5W
UV =13.4W
254nm.

This was a bit longer, but I spaced out and thought I'd posted it hours ago.

Then I saw;
"Genetic hybridization is funny that way" -Rusty Trichome:cool:

Of such stuff are signatures made.
Mahalo RT.

An' Aloha ya'll
Weeze

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Originally Posted by headshake

OM, i would be down for kicking in some money for testing equipment.

You are a gem, now I know why we let you hang around here. Nice offer but I think I'm talking thousands of dollars for a good spectrum analyizer. Maybe I should write a grant request to the government.

wouldn't it make sense that indica doms do better in the heat as they are believed to orginate from the hindu kush mountain range are of the middle east.

Last time I looked the Hindu Kush Mountains were in central asia.

where as the sativas seem to be from around equatorial regions right?

You just raised an interesting point without knowing. :) What the high mountain areas and equatorial regions share in common......is high levels of (drum roll please) UV radiation.

perhaps this also has to due with humidity?

Hmmm knna raised the issue of humidity levels during the experiment.


just throwing out thoughts from a hurting head!


-shake

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Always food for thought.:thumbsup:

Rusty,

You have hit upon something that we all forget about....almost everything that is grown today is a hybred. They are much more exploitable then say landrace strains. And you never know what latent traits linger in that gene cesspool.


Weezard,

Well at 254nm you are smack into UVc, which makes sence for a germicidal lamp. So from some of the things I've seen, the plant can use UVa, UVb and UVc. We are a long ways from figuring out what the best wavelenght for the plant is. It seems close counts when it comes to grenades and UV.

If UVc works just as well as UVb, that could be a eureka moment. UVc is safer, and would have the added benifit of killing pathogens, germs and stuff indoors.
Weezard you are the man!

OM