Fresh Start
Active member
...
OMG!!! Got some really BAD advice from a THC "Expert"
- Thread starter WeBeJammin
- Start date
Fresh Start
Active member
Nope. Pm is systemic, unfortunately. The rooms we grow in can also harbor the fungal spores but thats what Physan 20 and/or bleach douches are for.
If you want to decrease Pm infections Amino Acids and silica supplements help.
SirStynkalot
Member
Fresh Start
Active member
I'm stealing that
As long as neither one of us become famous it's only borrowing
why dont ppl run a sulfer burner? works for me everytime IS there a problem that I am unaware of with sulfer burners?
stevewinthrop
Member
Smells like a poopoo?
How a Sulfur Vaporizer Works
A sulfur vaporizer is useful only in enclosed spaces such as greenhouses or grow rooms. The vaporizer works by heating powdered sulfur to the point of evaporation; it does not burn sulfur. The evaporated sulfur condenses into microscopic particles. Heated air generated by the vaporizer carries the particles into the air, dispersing them into the greenhouse space. These particles settle onto the surface of the plant leaves and slowly change into sulfuric acid. This acid prevents disease spores from germinating.
Read more : http://www.ehow.com/info_10075290_sulfur-vaporizer.html
A sulfur vaporizer is useful only in enclosed spaces such as greenhouses or grow rooms. The vaporizer works by heating powdered sulfur to the point of evaporation; it does not burn sulfur. The evaporated sulfur condenses into microscopic particles. Heated air generated by the vaporizer carries the particles into the air, dispersing them into the greenhouse space. These particles settle onto the surface of the plant leaves and slowly change into sulfuric acid. This acid prevents disease spores from germinating.
Read more : http://www.ehow.com/info_10075290_sulfur-vaporizer.html
ya thts why you only run it every now and then and never after a few weeks in flower youll never get PM
stevewinthrop
Member
I'm just saying, that's could be why. Also there are other anti fungal that can be just as safe and effective but don't smell like a poopoo.
But sulphur burners always work very well. Better as a preventative.
But sulphur burners always work very well. Better as a preventative.
B Vitamins help prevent PM as well with that equation there
Fresh Start
Active member
+1 to this
Dude PM spreads through spores, not plant tissue. People need to stop spreading this misinformation.
Im confused too because I was told tht is is a disease that is in the plant. Thats why all OG kush gets PM under right conditions but other strains wont. Maybe Im an idiot
Fresh Start
Active member
Misinformation or information you have yet to research yourself?
"While most powdery mildew fungi produce epiphytic mycelium, a few genera produce hyphae that are within the leaf tissue; this is known as endophytic growth."
The above excerpt is from an article on The American Phytopathological Society website and written by Heffer, V., M.L. Powelson, K.B. Johnson, and N. Shishkoff. Oregon State University and USDA-ARS http://www.apsnet.org/edcenter/intropp/LabExercises/Pages/PowderyMildew.aspx
"An endophyte is an endosymbiont, often a bacterium or fungus, that lives within a plant for at least part of its life without causing apparent disease."
Endophytic fungus defined:http://en.wikipedia.org/wiki/Endophyte
My closing thoughts:
Powdery Mildew is a generic term for the legions of different species of fungus known to cause the common white powder on leaf surfaces. Some of those species are Endophytic and will lie dormant in plant tissue without noticeable signs of infection. So in part, you're right. There are powdery mildew infections that exist epiphytically and can be killed without the use of systemic fungicides. But then there are Endophytic species of fungus that DO exist systemically. Which one you have is a good question; but I doubt commercial grape vineyards waste their time sending infected samples into a pathology lab for identification- they use systemic fungicides for SYSTEMICALLY existing fungus.
stevewinthrop
Member
Misinformation or information you have yet to research yourself?
"While most powdery mildew fungi produce epiphytic mycelium, a few genera produce hyphae that are within the leaf tissue; this is known as endophytic growth."
The above excerpt is from an article on The American Phytopathological Society website and written by Heffer, V., M.L. Powelson, K.B. Johnson, and N. Shishkoff. Oregon State University and USDA-ARS http://www.apsnet.org/edcenter/intropp/LabExercises/Pages/PowderyMildew.aspx
"An endophyte is an endosymbiont, often a bacterium or fungus, that lives within a plant for at least part of its life without causing apparent disease."
Endophytic fungus defined:http://en.wikipedia.org/wiki/Endophyte
My closing thoughts:
Powdery Mildew is a generic term for the legions of different species of fungus known to cause the common white powder on leaf surfaces. Some of those species are Endophytic and will lie dormant in plant tissue without noticeable signs of infection. So in part, you're right. There are powdery mildew infections that exist epiphytically and can be killed without the use of systemic fungicides. But then there are Endophytic species of fungus that DO exist systemically. Which one you have is a good question; but I doubt commercial grape vineyards waste their time sending infected samples into a pathology lab for identification- they use systemic fungicides for SYSTEMICALLY existing fungus.
It won't lay dormant, it will grow and spread in the plant tissue, just like any parasitic fungus. It also won't be invisible, the mycelium will appear as a cloudiness under the surface of the tissue and will only sporulate when environmental conditions are optimal. If I remember correctly these fungi typically present on perennial plants and do not kill the host. I am hesitant to say that the common powdery mildew we find on Marijuana (or my god dammed zucchini and cucumber plants outdoors) is the systemic sort, only because surface treatment appears to eliminate the problem. If it were systemic in our pot plants, a sulphur burn or other surface treatment would do nothing because the mycelium are inside of the leaf. If anything the mildew would re-appear as soon as the sulphuric acid or antifungal was degraded or washed off.
I could always be wildly wrong as well.
