Just a theory, what do you think?

[armorzaku]

I've seen legitimate resources that say if you give 72 hours of darkness to a plant just before harvest that it puts out more resin glands.
Supposedly, its a defense mechanism to ensure survival of the next generation.

So my question is, using this theory or logic, would it make sense to periodically(Maybe 2-3 times) give the plant 72 hours of darkness throughout the flowering cycle?
Do you think it would do more damage then good? Id like to know your opinions

 

[nick88]

Ministry of Cannabis recommends to use the 72hr dark before harvest. Doing it through the whole flower cycle, will probably get you some pissed off females that are gonna throw some nuts at ya.

 

[dolamic]

While they're growing they need consistency. I use a 24 hour period of dark before going into flowering. I will try the 72 hour at the end of harvest. It does make sense to me, the plant goes into a state of urgency. It must try to reproduce to survive and to do that I'm guessing they swell their buds. Works for me

 

[armorzaku]

Ministry of Cannabis recommends to use the 72hr dark before harvest. Doing it through the whole flower cycle, will probably get you some pissed off females that are gonna throw some nuts at ya.

Thanks for your replies.
Im leaning towards the same perspective as you nick.
It's a theory that i thought of, but for some reason i feel it would be bad for the plants.

 

[CC Dobbs]

THC is degraded by light so if you provide a prolonged dark period just before harvest your flowers will have a higher percentage of THC. This is also a very good time for powdery mildew and bud rot so watch your humidity.

 

[armorzaku]

THC is degraded by light so if you provide a prolonged dark period just before harvest your flowers will have a higher percentage of THC. This is also a very good time for powdery mildew and bud rot so watch your humidity.

That makes sense. I don't have to worry about humidity where I reside.
Never really reaches above 60%

 

[Hydrotech364]

I haven't ever heard of this. Gave me an idea though may keep my light cycle's normal but drop the temps to 50-60F.Frostyyy....

 

[armorzaku]

I haven't ever heard of this. Gave me an idea though may keep my light cycle's normal but drop the temps to 50-60F.Frostyyy....

I might have to take this into consideration. Only consideration because uncle ben has already talked about night drops in temperature.
So I know they are beneficial. He says a good 10-15 degree drop in temperature is good, but I personally dont like dropping it that much. With the lights running i keep it at 68-70F and drop it too 60-62F

 

[imchucky666]

I've seen legitimate resources that say if you give 72 hours of darkness to a plant just before harvest that it puts out more resin glands.
Supposedly, its a defense mechanism to ensure survival of the next generation.

So my question is, using this theory or logic, would it make sense to periodically(Maybe 2-3 times) give the plant 72 hours of darkness throughout the flowering cycle?
Do you think it would do more damage then good? Id like to know your opinions

Ya, all theories SOUND good, but if you can tell me a place on this planet where there is no natural sunlight, where cannabis naturally grows and there is a period over 12, stretch it to even 18 hours of darkness, I'll believe this theory.
(***ASIDE FROM ALASKA*** Hello Hotrod , but you won't find cannnabis growing 'naturally' out on the tundra.) )

 

[imchucky666]

While they're growing they need consistency. I use a 24 hour period of dark before going into flowering. I will try the 72 hour at the end of harvest. It does make sense to me, the plant goes into a state of urgency. It must try to reproduce to survive and to do that I'm guessing they swell their buds. Works for me

If the plants have never experienced it before, how would they know what they're supposed to do?

 

[armorzaku]

Ya, all theories SOUND good, but if you can tell me a place on this planet where there is no natural sunlight, where cannabis naturally grows and there is a period over 12, stretch it to even 18 hours of darkness, I'll believe this theory.
(***ASIDE FROM ALASKA*** Hello Hotrod , but you won't find cannnabis growing 'naturally' out on the tundra.) )

You make a very good point, where in nature would there be NO sunlight?
There would be none, BUT in the fall and winter months natural light gets reduced to about 12 hours of sunlight.(obviously this is what initiates flowering)
That is 12 hours of pure, strong, vibrant light. But what if a plant is shaded for 6 hours of this twelve hour period? I bet you it will still grow? Maybe tendencies light that trigger this stress resin production because it feels like it may never get any sunlight again or at least for long period of time so its trying to ensure the survival of its kind?

There may be NO areas with absolutely NO sunlight.
but who says you need NO sunlight at all to trigger the response?
Maybe just prolonged exposure to low light situations might trigger this response?
were just triggering this response faster by given it zero light for 3 days.
instead of prolonged lack of light?

 

[melloyellofello]

Well this leads me to ask this as it is a theory in MMJ growing as well is that if you have light leak in a your dark period you will have a herm how is that when in nature there is a moon which provides light during this natural dark period I believe it is a genetic issue Cannabis has been described as having one of the most complicated mechanisms of sex determination among the dioecious plants.Many models have been proposed to explain sex determination in Cannabis. Based on studies of sex reversal in hemp, it was first reported by K. Hirata in 1924 that an XY sex-determination system is present.At the time, the XY system was the only known system of sex determination. The X:A system was first described in Drosophila spp in 1925.Soon thereafter, Schaffner disputed Hirata's interpretation,and published results from his own studies of sex reversal in hemp, concluding that an X:A system was in use and that furthermore sex was strongly influenced by environmental conditions. Breeding systems


Cannabis sativa fruits (achenes) that contain the seeds.
Cannabis is predominantly dioecious,although many monoecious varieties have been described.Subdioecy (the occurrence of monoecious individuals and dioecious individuals within the same population) is widespread.Many populations have been described as sexually labile.

As a result of intensive selection in cultivation, Cannabis exhibits many sexual phenotypes that can be described in terms of the ratio of female to male flowers occurring in the individual, or typical in the cultivar.Dioecious varieties are preferred for drug production, where typically the female flowers are used. Dioecious varieties are also preferred for textile fiber production, whereas monoecious varieties are preferred for pulp and paper production. It has been suggested that the presence of monoecy can be used to differentiate licit crops of monoecious hemp from illicit drug crops.However, sativa strains often produce monoecious individuals, Cannabis has been described as having one of the most complicated mechanisms of sex determination among the dioecious plants.Many models have been proposed to explain sex determination in Cannabis.

Based on studies of sex reversal in hemp, it was first reported by K. Hirata in 1924 that an XY sex-determination system is present.At the time, the XY system was the only known system of sex determination. The X:A system was first described in Drosophila spp in 1925.Soon thereafter, Schaffner disputed Hirata's interpretation,and published results from his own studies of sex reversal in hemp, concluding that an X:A system was in use and that furthermore sex was strongly influenced by environmental conditions.

Since then, many different types of sex determination systems have been discovered, particularly in plants.Dioecy is relatively uncommon in the plant kingdom, and a very low percentage of dioecious plant species have been determined to use the XY system. In most cases where the XY system is found it is believed to have evolved recently and independently.

Since the 1920s, a number of sex determination models have been proposed for Cannabis. Ainsworth describes sex determination in the genus as using "an X/autosome dosage type".

Dense raceme of carpellate flowers typical of drug-type varieties of Cannabis.
The question of whether heteromorphic sex chromosomes are indeed present is most conveniently answered if such chromosomes were clearly visible in a karyotype. Cannabis was one of the first plant species to be karyotyped; however, this was in a period when karyotype preparation was primitive by modern standards. Heteromorphic sex chromosomes were reported to occur in staminate individuals of dioecious "Kentucky" hemp, but were not found in pistillate individuals of the same variety. Dioecious "Kentucky" hemp was assumed to use an XY mechanism. Heterosomes were not observed in analyzed individuals of monoecious "Kentucky" hemp, nor in an unidentified German cultivar. These varieties were assumed to have sex chromosome composition XX.[70] According to other researchers, no modern karyotype of Cannabis had been published as of 1996.Proponents of the XY system state that Y chromosome is slightly larger than the X, but difficult to differentiate cytologically.

More recently, Sakamoto and various co-authors have used RAPD to isolate several genetic marker sequences that they name Male-Associated DNA in Cannabis (MADC), and which they interpret as indirect evidence of a male chromosome. Several other research groups have reported identification of male-associated markers using RAPD and AFLP.Ainsworth commented on these findings, stating,

"It is not surprising that male-associated markers are relatively abundant. In dioecious plants where sex chromosomes have not been identified, markers for maleness indicate either the presence of sex chromosomes which have not been distinguished by cytological methods or that the marker is tightly linked to a gene involved in sex determination.

Environmental sex determination is known to occur in a variety of species.Many researchers have suggested that sex in Cannabis is determined or strongly influenced by environmental factors.Ainsworth reviews that treatment with auxin and ethylene have feminizing effects, and that treatment with cytokinins and gibberellins have masculinizing effects.It has been reported that sex can be reversed in Cannabis using chemical treatment.A PCR-based method for the detection of female-associated DNA polymorphisms by genotyping has been developed.

 

[dolamic]

If the plants have never experienced it before, how would they know what they're supposed to do?

If the plants have never experienced what before?

 

[CC Dobbs]

If the plants have never experienced it before, how would they know what they're supposed to do?

Plants experience it every evening,it is the humans who must learn something new.

 

[CC Dobbs]

You make a very good point, where in nature would there be NO sunlight?
There would be none, BUT in the fall and winter months natural light gets reduced to about 12 hours of sunlight.(obviously this is what initiates flowering)
That is 12 hours of pure, strong, vibrant light. But what if a plant is shaded for 6 hours of this twelve hour period? I bet you it will still grow? Maybe tendencies light that trigger this stress resin production because it feels like it may never get any sunlight again or at least for long period of time so its trying to ensure the survival of its kind?

There may be NO areas with absolutely NO sunlight.
but who says you need NO sunlight at all to trigger the response?
Maybe just prolonged exposure to low light situations might trigger this response?
were just triggering this response faster by given it zero light for 3 days.
instead of prolonged lack of light?

Actually his point is not very well thought out. There are many places in the world where there is no sunlight. It happens every night everywhere. If you are counting moonlight then you are confusing a very simple technique unnessesarily.

 

[CC Dobbs]

Well this leads me to ask this as it is a theory in MMJ growing as well is that if you have light leak in a your dark period you will have a herm how is that when in nature there is a moon which provides light during this natural dark period I believe it is a genetic issue Cannabis has been described as having one of the most complicated mechanisms of sex determination among the dioecious plants.Many models have been proposed to explain sex determination in Cannabis. Based on studies of sex reversal in hemp, it was first reported by K. Hirata in 1924 that an XY sex-determination system is present.At the time, the XY system was the only known system of sex determination. The X:A system was first described in Drosophila spp in 1925.Soon thereafter, Schaffner disputed Hirata's interpretation,and published results from his own studies of sex reversal in hemp, concluding that an X:A system was in use and that furthermore sex was strongly influenced by environmental conditions. Breeding systems


Cannabis sativa fruits (achenes) that contain the seeds.
Cannabis is predominantly dioecious,although many monoecious varieties have been described.Subdioecy (the occurrence of monoecious individuals and dioecious individuals within the same population) is widespread.Many populations have been described as sexually labile.

As a result of intensive selection in cultivation, Cannabis exhibits many sexual phenotypes that can be described in terms of the ratio of female to male flowers occurring in the individual, or typical in the cultivar.Dioecious varieties are preferred for drug production, where typically the female flowers are used. Dioecious varieties are also preferred for textile fiber production, whereas monoecious varieties are preferred for pulp and paper production. It has been suggested that the presence of monoecy can be used to differentiate licit crops of monoecious hemp from illicit drug crops.However, sativa strains often produce monoecious individuals, Cannabis has been described as having one of the most complicated mechanisms of sex determination among the dioecious plants.Many models have been proposed to explain sex determination in Cannabis.

Based on studies of sex reversal in hemp, it was first reported by K. Hirata in 1924 that an XY sex-determination system is present.At the time, the XY system was the only known system of sex determination. The X:A system was first described in Drosophila spp in 1925.Soon thereafter, Schaffner disputed Hirata's interpretation,and published results from his own studies of sex reversal in hemp, concluding that an X:A system was in use and that furthermore sex was strongly influenced by environmental conditions.

Since then, many different types of sex determination systems have been discovered, particularly in plants.Dioecy is relatively uncommon in the plant kingdom, and a very low percentage of dioecious plant species have been determined to use the XY system. In most cases where the XY system is found it is believed to have evolved recently and independently.

Since the 1920s, a number of sex determination models have been proposed for Cannabis. Ainsworth describes sex determination in the genus as using "an X/autosome dosage type".

Dense raceme of carpellate flowers typical of drug-type varieties of Cannabis.
The question of whether heteromorphic sex chromosomes are indeed present is most conveniently answered if such chromosomes were clearly visible in a karyotype. Cannabis was one of the first plant species to be karyotyped; however, this was in a period when karyotype preparation was primitive by modern standards. Heteromorphic sex chromosomes were reported to occur in staminate individuals of dioecious "Kentucky" hemp, but were not found in pistillate individuals of the same variety. Dioecious "Kentucky" hemp was assumed to use an XY mechanism. Heterosomes were not observed in analyzed individuals of monoecious "Kentucky" hemp, nor in an unidentified German cultivar. These varieties were assumed to have sex chromosome composition XX.[70] According to other researchers, no modern karyotype of Cannabis had been published as of 1996.Proponents of the XY system state that Y chromosome is slightly larger than the X, but difficult to differentiate cytologically.

More recently, Sakamoto and various co-authors have used RAPD to isolate several genetic marker sequences that they name Male-Associated DNA in Cannabis (MADC), and which they interpret as indirect evidence of a male chromosome. Several other research groups have reported identification of male-associated markers using RAPD and AFLP.Ainsworth commented on these findings, stating,

"It is not surprising that male-associated markers are relatively abundant. In dioecious plants where sex chromosomes have not been identified, markers for maleness indicate either the presence of sex chromosomes which have not been distinguished by cytological methods or that the marker is tightly linked to a gene involved in sex determination.

Environmental sex determination is known to occur in a variety of species.Many researchers have suggested that sex in Cannabis is determined or strongly influenced by environmental factors.Ainsworth reviews that treatment with auxin and ethylene have feminizing effects, and that treatment with cytokinins and gibberellins have masculinizing effects.It has been reported that sex can be reversed in Cannabis using chemical treatment.A PCR-based method for the detection of female-associated DNA polymorphisms by genotyping has been developed.

Thanks for confusing the issue even more. It is not as complicated as you'd like it to be. Do you really understand what you pasted above?

 

[VICTORYGARDENSHYDRO]

The theory behind this is that the plant produces thc to protect it from the sun, Like suntan lotion, it produces it the most at night in anticipation of the sun rising, so, If the sun doesn't rise for 72 hrs, the plant(in theory) should produce a higher % of thc. It was proven to work in SOME strains. You would never know if it worked or not unless your a scientist.

 

[armorzaku]

Well this leads me to ask this as it is a theory in MMJ growing as well is that if you have light leak in a your dark period you will have a herm how is that when in nature there is a moon which provides light during this natural dark period I believe it is a genetic issue Cannabis has been described as having one of the most complicated mechanisms of sex determination among the dioecious plants.Many models have been proposed to explain sex determination in Cannabis. Based on studies of sex reversal in hemp, it was first reported by K. Hirata in 1924 that an XY sex-determination system is present.At the time, the XY system was the only known system of sex determination. The X:A system was first described in Drosophila spp in 1925.Soon thereafter, Schaffner disputed Hirata's interpretation,and published results from his own studies of sex reversal in hemp, concluding that an X:A system was in use and that furthermore sex was strongly influenced by environmental conditions. Breeding systems


Cannabis sativa fruits (achenes) that contain the seeds.
Cannabis is predominantly dioecious,although many monoecious varieties have been described.Subdioecy (the occurrence of monoecious individuals and dioecious individuals within the same population) is widespread.Many populations have been described as sexually labile.

As a result of intensive selection in cultivation, Cannabis exhibits many sexual phenotypes that can be described in terms of the ratio of female to male flowers occurring in the individual, or typical in the cultivar.Dioecious varieties are preferred for drug production, where typically the female flowers are used. Dioecious varieties are also preferred for textile fiber production, whereas monoecious varieties are preferred for pulp and paper production. It has been suggested that the presence of monoecy can be used to differentiate licit crops of monoecious hemp from illicit drug crops.However, sativa strains often produce monoecious individuals, Cannabis has been described as having one of the most complicated mechanisms of sex determination among the dioecious plants.Many models have been proposed to explain sex determination in Cannabis.

Based on studies of sex reversal in hemp, it was first reported by K. Hirata in 1924 that an XY sex-determination system is present.At the time, the XY system was the only known system of sex determination. The X:A system was first described in Drosophila spp in 1925.Soon thereafter, Schaffner disputed Hirata's interpretation,and published results from his own studies of sex reversal in hemp, concluding that an X:A system was in use and that furthermore sex was strongly influenced by environmental conditions.

Since then, many different types of sex determination systems have been discovered, particularly in plants.Dioecy is relatively uncommon in the plant kingdom, and a very low percentage of dioecious plant species have been determined to use the XY system. In most cases where the XY system is found it is believed to have evolved recently and independently.

Since the 1920s, a number of sex determination models have been proposed for Cannabis. Ainsworth describes sex determination in the genus as using "an X/autosome dosage type".

Dense raceme of carpellate flowers typical of drug-type varieties of Cannabis.
The question of whether heteromorphic sex chromosomes are indeed present is most conveniently answered if such chromosomes were clearly visible in a karyotype. Cannabis was one of the first plant species to be karyotyped; however, this was in a period when karyotype preparation was primitive by modern standards. Heteromorphic sex chromosomes were reported to occur in staminate individuals of dioecious "Kentucky" hemp, but were not found in pistillate individuals of the same variety. Dioecious "Kentucky" hemp was assumed to use an XY mechanism. Heterosomes were not observed in analyzed individuals of monoecious "Kentucky" hemp, nor in an unidentified German cultivar. These varieties were assumed to have sex chromosome composition XX.[70] According to other researchers, no modern karyotype of Cannabis had been published as of 1996.Proponents of the XY system state that Y chromosome is slightly larger than the X, but difficult to differentiate cytologically.

More recently, Sakamoto and various co-authors have used RAPD to isolate several genetic marker sequences that they name Male-Associated DNA in Cannabis (MADC), and which they interpret as indirect evidence of a male chromosome. Several other research groups have reported identification of male-associated markers using RAPD and AFLP.Ainsworth commented on these findings, stating,

"It is not surprising that male-associated markers are relatively abundant. In dioecious plants where sex chromosomes have not been identified, markers for maleness indicate either the presence of sex chromosomes which have not been distinguished by cytological methods or that the marker is tightly linked to a gene involved in sex determination.

Environmental sex determination is known to occur in a variety of species.Many researchers have suggested that sex in Cannabis is determined or strongly influenced by environmental factors.Ainsworth reviews that treatment with auxin and ethylene have feminizing effects, and that treatment with cytokinins and gibberellins have masculinizing effects.It has been reported that sex can be reversed in Cannabis using chemical treatment.A PCR-based method for the detection of female-associated DNA polymorphisms by genotyping has been developed.

thanks for the info but what the fuck are you talking about

 

[armorzaku]

The theory behind this is that the plant produces thc to protect it from the sun, Like suntan lotion, it produces it the most at night in anticipation of the sun rising, so, If the sun doesn't rise for 72 hrs, the plant(in theory) should produce a higher % of thc. It was proven to work in SOME strains. You would never know if it worked or not unless your a scientist.

makes sense. Do you have any exp with giving plants that dark period?

 

[dolamic]

How many mad scientists are out there?