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09-08-2009, 02:42 PM[/TD]
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TomHill
Senior Member
Join Date: Apr 2004
Posts: 1,344
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[TD="class: alt1, bgcolor: #FBFBFD"]Hello folks,
Apparently out of about 1200 viruses able to infect plants, only 5 infect cannabis regularly - Tobacco mosaic virus (TMV) is not one of them. Paulsen reported TMV causing symptomless infections in cannabis (Hemp Diseases and Pests).
I suppose it is possible, however I think it is unlikely we are looking at TMV on the boards in the last few years. As far as ChemD tissue samples supposedly testing positive for "the Virus" at UC Davis or where ever, well... If I remember correctly, this evidence came to light via a rival breeder right about the exact time Rez was releasing his -at the time- latest ChemD work. Meanwhile the rival or a friend was working on a "virus free" line too. I could be wrong, but I found it all somewhat suspicious I guess.
If we knew we had a virus -or some other systemic disease- there's tissue culture (easier said than done probably), or try to breed your way out while employing thermotherapy to seeds each generation before sprouting.
Again, I doubt this is what we're dealing with. I suspect it is a harmless case of inbreeding depression coupled with a threshold effect. That these symptoms are often showing up and "spreading" in the Chem, OG's, diesels etc, is just a little too much of a coincidence imo. More likely that it "spread" (read: the trait expressed itself among plants sharing that trait) right at the time an environmental threshold was met. That some folks are reporting symptoms and some reporting none (with the exact same clone) is a little off the mark too imo if we were looking a virus. There might be a temperature sensitive threshold to be reached, it might have to do with feeding, it could be almost anything, but folks who "have the TMV" are very likely doing something different with their environment than folks who "don't know what these other guys are talking about". The trait can be there, and require some environmental trigger for it to be expressed, this is quite common. This seems the most logical explanation to me, but who knows. -Tom
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