UV light??? Up THC and Kill Mold! Win win?
Been doing yet some more Reading, this time about UV lights, Been thinking about Bud rot and UV light helping with that but also found it might up the THC as well so maybe a Win Win???
Purchase a UV lamp. Get a lamp that emits UV-C light for the best results in killing off mold and mold spores. UV lamps can be purchased at most hardware stores or online. Wear a pair of UV-opaque goggles or glasses when working with a UV lamp, as the light can be damaging to your eyes. Goggles that protect your eyes from harmful UV rays can be purchased from a tanning salon or online.
A researcher conducted a controlled experiment in a greenhouse. He lit a group of high potency plants similarly except with the addition of UVB light to some groups. He found that the percentage of THC increased in a direct ratio with the increase in UVB light. This research confirms the adage that high altitude plants are more potent than those grown at low altitudes.
If you look at old-world land races of cannabis, plants that have become adapted to the climate and latitude, the ratio of THC to CBD starts at 100 : 1 at the equator. At the 30th parallel (The Hindu-Kush Valley) the plants have a ratio of 50 : 50. At the 45th parallel the ratio is near 1 : 100. This corresponds roughly with the amount of UVB light received at these latitudes. There is much more UVB at the equator than the 45th parallel.
How can you get more UVB light to your plants? Certainly it's true that MH lamps emit more UVB light than HPS lamps. Still the amount that MH lamps emit is small. In fact, many manufacturers use UVB shielding glass to filter out most of the UVB that's produced. The UVB light the plant receives from an MH lamp does increase the plant's potency slightly at the cost of yield, but there are better ways to introduce UVB light into the grow room. They include reptile lights, which emit about 10% UVB, and tanning lamps.
The problem with using these lamps is that they are associated with increased number of cancers and many other problems. They should not be on when you are in the grow room. Not much research has been conducted on using them to produce higher THC values. I will do a full report in a future issue.
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I read that a while ago, then was gutted to realised my black lights I have were no use. I have seen a few attempts with it but never a side by side though. Would be good to see what the difference would be.
I've been using one for a few grows. UVB for thc. Definately does something, makes mine much smellier and I'd like to think potent.
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As above, uvb reptile lamp but I only have it daily on for about 5hrs in middle of flowering days and treat it with respect, ie: no looking directly at the bulb
Had it mostly directed onto a silver haze recently and that initial thc rush was something else
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How about Bud Rot any help with that? As it kills Mold I would think it would help with Bud Rot, add CO2, and might be the best for mix growing plants, I am thinking!
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Can't say yay/nay 100%, but I've not had any since using it, although my environment was pretty dialled in at the time. Coincidence perhaps but I was planning on giving the new groom a 24hours blast though before my next batch go in as I pretty much buy into the sterilising effect of them
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What wt UV lights you using?? are they cool or hot?
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im using a UV-C light for powdery mildew and it does get rid of it so will kill bud rot.
I really screwed my eyes up for 2 days using it without shades.
i got a 30w T8 bulb,too strong.
first used it and you saw the damage i did to the 530 trainwreck,well besides that plant i burnt a few others.
they still live
i found i had to stand about 8 ft away and this kills the mold and doesn't burn the plant,any closer with the 30w bulb and leaves drop of in a few days.
get a 9w light at the most with the UV-C.
UV-B bulbs don't kill the mould,they produce more THC so you have to get both,UV-C and UV-B.
(plus lots of sunglasses)
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Trichomes and cannabis
Trichomes evolved on cannabis to prevent herbivory/parasitism by small insects. In the wild, insects landing on a cannabis leaf become adhered to the trichomes causing death or lost time (see sundew) and in addition will absorb the cannabinoids and, so intoxicated, experience increased rates of predation and loss of will to escape. However, the intercession of man in the natural selection process has rapidly accelerated the favoring of genotypes that produce copious amounts of THC-laden trichomes. In addition, THC has very high UV-B absorption properties, thus cannabis evolution may have favored the evolution of genotypes that produced these THC laden capitate-stalked trichomes as a built in 'sun-screen' for protection against UV-B light rays. The dried trichomes of cannabis used for smoking purposes is called kief. Species See separate list. ... Tetrahydrocannabinol, also known as THC, Î”9-THC, Î”9-tetrahydrocannabinol (delta-9-tetrahydrocannabinol), Î”Â¹-tetrahydrocannabinol (using an older numbering scheme), or dronabinol, is the main psychoactive substance found in the Cannabis plant. ... Look up Cannabis in Wiktionary, the free dictionary. ... Kief or kif is the dried resin glands (or trichomes) of cannabis, which accumulates on containers or has been removed with a kiefing screen or sieve. ...
THC Has A high UVB Absorbtion rate its part of the plant protection against UV, so if you blast the plant with UVB the plant in turn will try & defend itself by creating more THC
Plus it potects from bugs
Last edited by Budmore; 24-02-12 at 05:46 AM.
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also here`s another bit of info ya all might find interesting
THC: delta-9-tetrahydrocannabinol and delta-8-tetrahydrocannabinol - THC mimics the action of anandamide, a neurotransmitter produced naturally in the body, which binds with the cannabinoid receptors in the brain to produce the ‘high’ associated with marijuana. THC possesses high UV-B (280-315 nm) absorption properties.
THCV: tetrahydrocannabivarin - prevalent in certain South African and Southeast Asian strains of cannabis. It is said to produce a ‘clearer high’ and seems to possess many of the therapeutic properties of THC.
CBD: cannabidiol - previously believed to be psychoactive, or to contribute to the high by interacting with other cannabinoids, conversely the most recent research indicates that CBD has negligible effect on the high, it is however a strong anti-inflammatory, and may take the edge off some THC effects, such as anxiety. CBD as a non-psychoactive cannabinoid appears to be helpful for many medical conditions.
CBD biosynthesizes into cannabinol (CBN) & tetrahydrocannabinol (THC).
CBN: cannabinol - a degradation product of THC, produces a depressant effect, ‘fuzzy’ forehead.
CBC: cannabichromene - non-psychoactive , a precursor to THC.
CBG: cannabigerol - non-psychoactive, hemp strains often possess elevated levels of CBG while possessing only trace amounts of THC.
Ive highlighted the part that was of serious interest to me, LED Lights are measured in NM & i believe you can buy LED`s in the 280-315 nm range rather then UVB reptile bulbs but be careful if you use these because they are known to bleach a plants colour if its used to much.
Hope you all find this useful
Sorry to double post
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blue cheese (24-02-12),
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I use the occasional UVB tube in my surround. UVC unravels dna, that is the killing effect it has, all dna it touches.
UVB seems to increase black algae on my rockwool.
I put as much UVB for twelve hours straight as a meadow at the equator would get during noon. It seems to create creeper weed more that increasing the direct potency. I can get quite a bit more stoned with it, by the time I stop 'cause I've had enough...I keep getting high for another half hour!
Here's a picture of the tubes, should be able to read the names.
T5 group.jpgT8 group.jpg
Between the two brands, Reptisun (T8) and Arcadia (T5), the Arcadia gave me real sunburn and has to be kept back, the Reptisun can be right on top for the same reading.
Here are readings right off the bulbs.
Arcadia, 20 cm.jpgReptisun, 20 cm.jpg
I have been using UVB in my surround for six months. I started with a test area getting enough UVB to kill the plant. And the next. And the next.
The fourth plant lived, severely stunted. So far so good two harvests in a row. Smaller than the previous average, but more overall enjoyment from the smoking experience.
Last edited by Phaeton; 24-02-12 at 08:39 AM.
Reason: wanted to add another picture
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Mate, I suffer with PM and can't seem to shake it, have heard about these UV-C lights doing the job.
Originally Posted by MrMojorising
But I was wondering, do they cure it or simply get rid of whats showing? Can you still smell PM (you know that horrible musky smell)? Does it stop it coming back, obviously providing your room conditions are better than they were when you first contracted PM like me.
Whilst it would be a nice easy solution as spraying em I find a bit of a ballache and never does very well, I fear it would just be a bandaid and keep coming back.
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Good info guys and just what I was looking for.
I used to use a 10,000kelvin light for the last 2 weeks of flower. Since it was confiscated, I have been disappointed with the potency of the couple of plants I have grown at my friends house. The 600W 10k bulb wasnt cheap, £60 and I just cannot afford to replace it.
So, the space I have available it a small cupboard, 2ft 6 x 3ft with a 400W dual spec HPS, what uV bulb should I get to supplement the HPS?
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Thanks everyone I am learning a lot..
MH puts out more UV-"??" light then HPS! also seen this,, "Don't remember what one B or C off the top of my head.[/COLOR]"
This was on Cali growing Hemp, I was looking for GMO in Cannabis when I came across this.!
THC regulations serve as a bureaucratic tool to monopolize the Hemp industry. All known low THC varieties grow only in temperates north of the earths 45th parallel circle of latitude < link> This is due to the low UVB radiation coming from the sun at those climates. California’s climate receives substantially higher amounts of UVB radiation then northern climates and thus drastic increases in THC levels are common. This makes the task of regulating THC very difficult. The result is that THC regulations effectively ban 100% of all Cannabis already being grown by California farmers, forcing farmers to be dependent on the agricultural establishment for seed.
So then hillbilly, are you gonna be making a road trip to the Canadian border this spring to drop a few of yours off, guerilla styleee and get more CBD/N come the fall? lol
If I read that last quote right, if we were to re-introduce some 'hemp' into the mix, would that give an instant increase in CBx in the offspring? and better 'medicinal' weed I wonder That would be an interesting path to follow/lead.
It has surfaced twice since first treating them,nothing as bad as it was the first time,just a few specs every couple of weeks,
Originally Posted by Up_in_smoke
the bulb only kills what the light shines on-meaning you have to make sure the whole plant is treated,no different to spraying.
the smell went as soon as i switched the light on,the big bulb i got was to treat the room as well,fans,tents,carpet etc...
my pm was from a cutting i got,i still have it as a mother plant as it smells lovely but i have to treat it every 10 days because i know it will show its head again as its in the plants system(took me a little time to suss that one out)
now i have binned the mum but will strip the tent down and blast everything as a spring clean when the final plant finishes flowering.
i will be getting a UV-B bulb next
so now i have started using it in a schedule,all plants out every 10 days and treat them,and a sweep of the inside of the tent.
my advice is to attach the light to something and then spread the plant out so the stems and smaller leaves get treated,turning the plant round as well.
but as i said i've had to find out by starting too close and working back,so now i'm 8ft away and i know this kills the spores and has no affect on the leaves.
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