Adding UVB spectrum to COBs - opinions on this setup?

Uberknot

Uberknot

Well-Known Member
Abiqua said:
but thats the problem...several of those posted "studies" show a variety of mechanisms and their supposed interactions with the environment etc.

What you are thoughts on the flavonols that may inhibit UV-b and soil components influence on UV influence...those were done on "other" plants and present new arguments imho..

I am fully on board the UV makes a difference train, but when the literature is actually reviewed, the methodologies are weird and actual data is scant.

It makes as much sense as taking the addiction theory in humans from a study on mice.....

Cannabis is technically a weed and a desert plant. It is also dioecious [8% of all plants] and has a very simple genotype in terms of diploid number 2n....with little known polyploidy...on top of all those reasonably similar characteristics, it produces more compounds than just about any other known plant. We still are finding new compounds....

The plant may also exhibit traces of both C3 and C4 [this is where the desert plant aka Central Asia origins? may come in] respiration.

I think it is too easy to gloss over and say this is just a simple plant. Well maybe we taken as a far look back, but even the genome hasn't been fully sequenced.

Just some thoughts :peace:
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Just from the little I have found and read through it seems more say it dehydrates the plant and that increases the THC some. Maybe the plant reacts to make other things happen as well.

But yes there has not been a huge amount of technical studies and results.
 
Abiqua

Abiqua

Well-Known Member
Uberknot said:
Just from the little I have found and read through it seems more say it dehydrates the plant and that increases the THC some. Maybe the plant reacts to make other things happen as well.

But yes there has not been a huge amount of technical studies and results.
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I have been watching too many Youtube videos from kevin mckiernan...He was talking about testing costs coming down based more on dna analysis markers than "machine" aka GC HPLC etc etc...so maybe that will help speed up some of this answer process..

I have some material ready for testing and it isn't cheap at all...65 a test with 3.5g as sample weight. I just need 10! lol....

I understand that testing is a big hindrance especially in a mom and pop scenario, hell even in most of the commercial setups I bet...but it is getting better...and testing isn't the end all be all either...just a nice baseline to start the conversation imho :peace:
 
Abiqua

Abiqua

Well-Known Member
Also makes you wonder about the variety of mechanisms that plants have to deal with UV and oil as its' resultant product, essentially.
Makes you wonder.....What the fuck is really going on...
Is a simple plant induced by soil and light as the only drivers to produce diverse compounds? diverse enough to be in the top 1% of compound diversity of all plant life?.

Polyploidy plants are sometimes know for their diversity in compounds, but the opposite is true in cannabis?

Time to get the colchine and some reptile lamps :leaf:
 
researching

researching

Well-Known Member
Abiqua said:
SC labs gave a talk in may 2016?
at harvard about the 2015 emerald cup....

The top 20 winners tested higher about 1.5 standard deviations higher in terpenoid content on average than the overall sample size which was either 400 430.

Thc content was specifically mentioned as not being necessarily the highest in the Top 20 samples...

That said, there is no info on growing. Being the Emerald cup, I bet a majority is organic outdo, but....and might also lend credence to the argument that THC % alone, doesn't mean much on the surface.....
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I think it says a lot about the connoiseur smoker. I have always been a taste over thc guy. My fondest memories of smoking are of hash and the wonderful spicy limonene taste. Probably also why dabs are so wonderful, or I like budder more than shatter. Terpenes are amazing. On the contrary I have a wifey that is a smoker who just likes to get high. I have strains that I have grown over a year she cant identify by smell, taste doesnt matter to her etc..

It makes sense too that they are more than likely outdoor and therefore exposed to UV's, that indoor may not contain.
 
researching

researching

Well-Known Member
Abiqua said:
Also makes you wonder about the variety of mechanisms that plants have to deal with UV and oil as its' resultant product, essentially.
Makes you wonder.....What the fuck is really going on...
Is a simple plant induced by soil and light as the only drivers to produce diverse compounds? diverse enough to be in the top 1% of compound diversity of all plant life?.

Polyploidy plants are sometimes know for their diversity in compounds, but the opposite is true in cannabis?

Time to get the colchine and some reptile lamps :leaf:
Click to expand...
Just imagine if the government who has known forever that marijuana is not a bad or hard drug, would have not hid behind the ignorant ego driven propaganda regime and allowed published testing or clinic studies how much more beneficial imformation we would have.
 
Abiqua

Abiqua

Well-Known Member
a mongo frog said:
You ever been in a dispensary trying to vend with 20 other people in the waiting room doing the same thing? I promise to everyone that having your meds already tested is an absolute bonus.
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I was mainly referring to developing a method to possibly test cannabis for UV exposure etc etc...

and I absolutely agree with mandatory testing for commercial. for that I would change my statement to say, "Types of testing aren't that end all be all...

The McKiernan guy I mentioned earlier giving cannabis genomics talks on youtube, mentioned dna marker tests in place of mold/ spore counts and bacteria / viral counts. This type of testing, is showing promise to as accurate as existing methods [agar] and in the long run will probably be substantially cheaper. The dna test itself is fairly simple, physically, we just need the cost to come down in tools...

So maybe I making an inadvertent argument to shore up more of the DNA of the plant itself and hopefully the community can run with more of this tech. :peace:
 
REALSTYLES

REALSTYLES

Well-Known Member
a mongo frog said:
You ever been in a dispensary trying to vend with 20 other people in the waiting room doing the same thing? I promise to everyone that having your meds already tested is an absolute bonus.
Click to expand...
Yeah and have it all organic. I'm all ORMI listed products now besides compost and chicken shit. I only use OMRI listed pesticides like Spinosad and Azamax for mite preventative.
 
Abiqua

Abiqua

Well-Known Member
PhotonFUD said:
So if you have never ran them then why are you promoting them? Sounds like a schill to me.
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eh.....then half the community are shills and half aren't...but for example I could teach someone to drive without driving, too simplistic? they are just using a body of knowledge promoted for a long time. Misinformed? maybe, shill? doubtful, even Air. The passion is there. Fuck it.
 
PhotonFUD

PhotonFUD

Well-Known Member
Abiqua said:
eh.....then half the community are shills and half aren't...but for example I could teach someone to drive without driving, too simplistic? they are just using a body of knowledge promoted for a long time. Misinformed? maybe, shill? doubtful, even Air. The passion is there. Fuck it.
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Looking at his posting history, he seems to post a lot of recommendations for things he hasn't used so either he is promoting for self interest or is just plain stupid.

Either case it is best to stay away from such advice.
 
CobKits

CobKits

Well-Known Member
REALSTYLES said:
Yeah and have it all organic. I'm all ORMI listed products now besides compost and chicken shit. I only use OMRI listed pesticides like Spinosad and Azamax for mite preventative.
Click to expand...
i love the spinosad.

esp if youre a dipper not a sprayer because you mix up a bucket and provided its not over 7 ph and in a dark place, it lasts quite a while, as opposed to mixing up azamax every few days.

had a terrible supermite recently that a rigid azamax regimin couldnt shake. i upped my azamax to 30 ml/gal (per one of your posts i believe) and did azamax day 0 and day 2, and spinosad days 4,6 and 8.

100% elimination without any of the toxic stuff

could have used that spinosad bucket forever stored in the dark in mildly acidic water. hydrolysis half life over 200 days:

http://tinyurl.com/zh5va8z
 
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REALSTYLES

REALSTYLES

Well-Known Member
CobKits said:
i love the spinosad.

esp if youre a dipper not a sprayer because you mix up a bucket and provided its not over 7 ph and in a dark place, it lasts quite a while, as opposed to mixing up azamax every few days.

had a terrible supermite recently that a rigid azamax regimin couldnt shake. i upped my azamax to 30 ml/gal (per one of your posts i believe) and did azamax day 0 and day 2, and spinosad days 4,6 and 8.

100% elimination without any of the toxic stuff

could have used that spinosad bucket forever stored in the dark in mildly acidic water. hydrolysis half life over 200 days:

http://tinyurl.com/zh5va8z
Click to expand...
You should've did both at the same time 30ml per gal and just spray every 3 days
 
Evil-Mobo

Evil-Mobo

Well-Known Member
Tim Fox said:
@Evil-Mobo thougjts you ran UV
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I did and my experience was nothing but trouble with the agromax UV bulb listed here:
http://www.htgsupply.com/products/agromax-pure-uv-t5-bulb-4-foot

It, to me, was not worth the hassle of burnt plants etc. For my T5's I have settled on the GE 6500K Starcoat T5's and it's the setup that has worked best in the T5 for me, and especially for the $$ involved per bulb. I am not against future tinkering with UV but definitely not with the same bulb I was using before. However I myself decided it's probably best until I have some more grows under me to start messing with added on stuff like that. I have much to learn still I am sure which will get me bigger yields vs a light bulb that is to be run for 15 minutes/hour etc..........

My thought process with the COB's this time for my DIY is to mess around with the spectrum of the COB's themselves first and see where that gets me. Might not get me anywhere, but there was solid thinking behind this with HID so why wouldn't it work for COB's......

It is my belief that everyone is getting the "hot rod" mentality with the COB's of just push them harder and I feel we are losing a lot in this transition of mentality with COB's. @Rahz is currently doing some neat testing, and as soon as a frame and driver get in I will be doing some testing on plants with the lights I am building myself.

Sorry for the rant Tim, but I am just sharing my thoughts here. I am of the opinion that there is still much to learn when it comes to the COB's, and I feel it will eventually settle down and we will see more efficient LED's running in the 40w-60w/LED range.............. as Citizen has already started to show us.
 
DankaDank

DankaDank

Well-Known Member
This is an interesting study , it's not cannabis specific but, cannabis likely shares the same defense mechanism as almost every other plant in regard to UV.
http://plantsinaction.science.uq.edu.au/edition1/?q=content/12-2-3-ultraviolet-radiation-and-plant-biology
Here's a little piece,
Activation and photo-deactivation of important signal molecules, such as hormones and photoreceptors, may also compound effects of UV-B irradiation on plant growth and development. For example, cell extension in many plants is influenced by indole acetic acid (IAA) which absorbs in the UV-B region and is photo-oxidised to 3-methyleneoxindole, an inhibitor of hypocotyl growth when exogenously applied (Tevini and Teramura 1989). In contrast, irradiation with UV-B can induce enzyme activity in the shikimic acid pathway, which regulates the synthesis of a broad array of plant compounds ranging from flavonoids to lignin, all of which are important to plant function, including tolerance to UV-B radiation (Caldwell et al. 1989).

Don't know if this link was already posted.
http://medicalmarijuanagrowing.blogspot.co.uk/2013/02/uvb-uva-lighting-study-results.html

I don't need to tell anyone this. Take this with a grain of salt, not in the mood for arguments.
If you want more I have a whole arsenal of UVB studies in my bookmarks , AND yes most of them are not cannabis
specific.
 
Airwalker16

Airwalker16

Well-Known Member
Evil-Mobo said:
I did and my experience was nothing but trouble with the agromax UV bulb listed here:
http://www.htgsupply.com/products/agromax-pure-uv-t5-bulb-4-foot

It, to me, was not worth the hassle of burnt plants etc. For my T5's I have settled on the GE 6500K Starcoat T5's and it's the setup that has worked best in the T5 for me, and especially for the $$ involved per bulb. I am not against future tinkering with UV but definitely not with the same bulb I was using before. However I myself decided it's probably best until I have some more grows under me to start messing with added on stuff like that. I have much to learn still I am sure which will get me bigger yields vs a light bulb that is to be run for 15 minutes/hour etc..........

My thought process with the COB's this time for my DIY is to mess around with the spectrum of the COB's themselves first and see where that gets me. Might not get me anywhere, but there was solid thinking behind this with HID so why wouldn't it work for COB's......

It is my belief that everyone is getting the "hot rod" mentality with the COB's of just push them harder and I feel we are losing a lot in this transition of mentality with COB's. @Rahz is currently doing some neat testing, and as soon as a frame and driver get in I will be doing some testing on plants with the lights I am building myself.

Sorry for the rant Tim, but I am just sharing my thoughts here. I am of the opinion that there is still much to learn when it comes to the COB's, and I feel it will eventually settle down and we will see more efficient LED's running in the 40w-60w/LED range.............. as Citizen has already started to show us.
Click to expand...
Perhaps you'd be better suited with this bulb?
http://www.htgsupply.com/products/agromax-4-foot-t5-pure-par-bulb
Or
http://www.htgsupply.com/products/agromax-4-foot-t5-uv-a-plus-bulb
 
JorgeGonzales

JorgeGonzales

Well-Known Member
DankaDank said:
This is an interesting study , it's not cannabis specific but, cannabis likely shares the same defense mechanism as almost every other plant in regard to UV.
http://plantsinaction.science.uq.edu.au/edition1/?q=content/12-2-3-ultraviolet-radiation-and-plant-biology
Here's a little piece,
Activation and photo-deactivation of important signal molecules, such as hormones and photoreceptors, may also compound effects of UV-B irradiation on plant growth and development. For example, cell extension in many plants is influenced by indole acetic acid (IAA) which absorbs in the UV-B region and is photo-oxidised to 3-methyleneoxindole, an inhibitor of hypocotyl growth when exogenously applied (Tevini and Teramura 1989). In contrast, irradiation with UV-B can induce enzyme activity in the shikimic acid pathway, which regulates the synthesis of a broad array of plant compounds ranging from flavonoids to lignin, all of which are important to plant function, including tolerance to UV-B radiation (Caldwell et al. 1989).

Don't know if this link was already posted.
http://medicalmarijuanagrowing.blogspot.co.uk/2013/02/uvb-uva-lighting-study-results.html

I don't need to tell anyone this. Take this with a grain of salt, not in the mood for arguments.
If you want more I have a whole arsenal of UVB studies in my bookmarks , AND yes most of them are not cannabis
specific.
Click to expand...
Man, once I realized my indoor peppers were growing all fucked up because of lack of UV, I haven't even given it a second thought as to whether it's important to certain plants. That was a long time ago, but the lesson stuck. It's not just some sort of useless plant stressor, it's important for healthy development at least some of the time.
 
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