Is This Tobacco Mosaic Virus (TMV)?

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Parlika

Member
Hey guys,

I have checked every sticky thread and diagnosis guide I can find and I have ruled out everything except Tobacco Mosaic Virus or a weird genetic trait.

It's not thrips, it's not heat burn - I noticed one leaf that looked weird, then I noticed curling, then more leaves started to exhibit similar traits as the plant grew.

My other plants are fine, and this was a new clone from a local medical dispensary - hence it being suspect. The room temp is at 75, the pH is at 6.5, using General Organics line of nutrients. Nothing out of the ordinary.

What do you guys think? It has the characteristic "one side curling" of TMV. Also the chlorophyll damage and bleaching/mottling.

If confirmed, what are you recommendations on course of action?

Thanks in advance guys. :)
 

Attachments

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grokillaz

Active Member
IVIars said:
TMV does not exist in cannabis plants. If anyone has any tissue samples that have been tested positive for it, please let me know. Every time people test for it, it comes back neg. It seems to be more of a def. or trait that shows up that some can get rid of with extra calmag.
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At icmags infirmatory there is a sticky about tmv. People have tested positive for it go check. A lot of times it does test negative but that just means its a different virus. There are many types of mosaic virus and to just by the test kit for a specific one is just a waste. But I personally believe it exists but that's just me. I seen it ruin many of plants. Thrips and fungus gnats spread it like wild fire. I'm not sure if your plants have it but if they start showing blistering new growth and they end up stunting with very slow growth I'd trash the grow and start over . It infects scissors and razorblades so be very careful. Cal/mag seems to keep symtoms away sometimes. I would quarantine the plant until you know for sure. what strain is it? I also read a lot of people get it from cuts they buy from dispensaries. Some of the best clone only's carry it. They say chem d has it, the only way to get rid of it from a strain you want to keep is very hard and has to do with tissue culture. The fact that it transfers to seeds sux big time. Now I trust no seed or cut from friends. Only seedbanks I trust just because I seen it in quite a few gardens and seems some growers are in denial.
 
P

Parlika

Member
IVIars said:
TMV does not exist in cannabis plants. If anyone has any tissue samples that have been tested positive for it, please let me know. Every time people test for it, it comes back neg. It seems to be more of a def. or trait that shows up that some can get rid of with extra calmag.
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Thanks for the reply, IVIars! I noticed that Hemp mosaic virus came up a few times in some research being done:

http://en.wikipedia.org/wiki/Hemp_mosaic_virus

And it looks like these test strips only work for the solanaceae plant family form of the virus:

https://orders.agdia.com/InventoryD.asp?attribute_Size=5&collection=ISK+57400&loc=IN
 
P

Parlika

Member
grokillaz said:
At icmags infirmatory there is a sticky about tmv. People have tested positive for it go check. A lot of times it does test negative but that just means its a different virus. There are many types of mosaic virus and to just by the test kit for a specific one is just a waste. But I personally believe it exists but that's just me. I seen it ruin many of plants. Thrips and fungus gnats spread it like wild fire. I'm not sure if your plants have it but if they start showing blistering new growth and they end up stunting with very slow growth I'd trash the grow and start over . It infects scissors and razorblades so be very careful. Cal/mag seems to keep symtoms away sometimes. I would quarantine the plant until you know for sure. what strain is it? I also read a lot of people get it from cuts they buy from dispensaries. Some of the best clone only's carry it. They say chem d has it, the only way to get rid of it from a strain you want to keep is very hard and has to do with tissue culture. The fact that it transfers to seeds sux big time. Now I trust no seed or cut from friends. Only seedbanks I trust just because I seen it in quite a few gardens and seems some growers are in denial.
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Thanks a lot for the reply and great info, grokillaz!

The strain is Grape Krush.

I'm thinking the some of the testing kits are for the solanaceae plant family forms of the virus and it doesn't pick up the Hemp Mosaic Virus since it's a different protein. I've seen a lot of the pictures and the side curling and chlorophyll bleaching are definitely commonalities that don't seem to be genetic or nutrient in nature. I'm pretty new to growing, so I've got an open mind. Just want my girls to be healthy! :)

I'll do the quarantine and monitor the growth as you said ... I have to admit there does seem to be stunting and slow growth now =/

Thanks again!
 
I

IVIars

Active Member
grokillaz said:
At icmags infirmatory there is a sticky about tmv. People have tested positive for it go check.
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Lots of pics and claims, but i didnt see any tissue sample done. Like you said there are many mosaic viruses, but TMV isnt one that cannabis has. And if someone does, then they are 1 in a billion.
 
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grokillaz

Active Member
IVIars said:
Lots of pics and claims, but i didnt see any tissue sample done. Like you said there are many mosaic viruses, but TMV isnt one that cannabis has. And if someone does, then they are 1 in a billion.
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Good luck to you if you ever encounter this myth
 
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IVIars

Active Member
I have signs of it in some of my plants. It is my understanding that the virus would spread to all in the same room. It shows up more when there is a problem with nutes is what i am realizing. My Dutch Dragon shows the symptoms, and when I over feed her just a scotch it shows up on more leaves. I am not saying it isnt a virus, but it most likely isnt TMV IMO. Again IMO i think more research should be done with other viruses that could be the cause of this.
 
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Dirty Harry

Well-Known Member
I can not 100% ID TMV, but the sideways kinking of fan leaves is one of the symptoms along with necrosis spots.
That looks like what I would call it, but again, I haven't be in the game long enough to say I know what I am talking about.
 
P

Parlika

Member
Hey guys,

Thought I would post a link to a post that caused me to ask the TMV question. All the symptoms you see in this post are exactly the same as what I have with my Grape Krush plant.

By definition, TMV occurs in a different family of plants. I'm not saying this is Hemp Mosaic or something else - I'm too much of a n00b to say one way or another :) - but I will say that the guy who posted on this forum seems to believe it is definitely symptoms of a virus, and whatever is going on with these plants looks to be the same exact thing my Grape Krush is going through.

I'll withhold opinion until someone can scan plants with these symptoms under a scanning electron microscope. :) But anyways, check it out:

http://forum.grasscity.com/sick-plants-problems/623147-tobacco-mosaic-virus-tmv-pics-info.html
 
savinggrace1

savinggrace1

Member
i cant see anywhere that it is caused by tobacco smoke?? it seems it is called what it is because it affects tobacco plants although thats just what i have found while researching on the web. my white widow plants have very similar symptoms
widow.jpg
 
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hempgirl

Member
throw them away immediately... it will spread throughout your entire house and then good luck getting rid of it completely
 
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billywilly

New Member
I'd like to set the record straight about Tobacco Mosaic Virus or (TMV) I'll try to keep this short, because I see it as a NO ARGUMENT argument. Cannabis does not belong to the Nightshade family, there for, it can NOT be infected with TMV. I would have to guess for those of you who believe your girls have TMV, they may have HMV, (Hemp Mosaic Virus) it's very similar to TMV. Go Google it. HMV can only attack Cannabis sativa Cannabis indica and Cannabis ruderalis. I do believe HMV is very rare down in your basements. Unless of course you may be close to a Hemp farm somewhere or near a wild cannabis crop. If you're no where near wild hemp or wild cannabis then all of a sudden, out of nowhere, you have this problem, then it's extremely unlikely it's HMV. Now, how to know FOR SURE. Look closely at a leaf of your plant that has the mottled colors of light and dark green spots/splotches. If those light colored splotches do not radiate from the leaf VAINS, then it's not HMV. Both TMV and HMV can be identified by those light colored splotches that form on the leafs top sides. If those light colored splotches are just randomly placed over the leaf surface and not starting or radiating from the leaf veins, then spreading outward from the vains, then you know it's not HMV. I just thought I'd try to clear this up, because as someone here pointed out. There's a ton of misinformation out there about cannabis and TMV!
 
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billywilly

New Member
I use concentrated tobacco smoke to kill spider mites in my room. I make a tobacco smoke bomb with an old vacuum cleaner and a tin can full of pipe tobacco. I reverse the air flow on the vacuum to blow into the can of tobacco. I light the tobacco right where the hose blows air into a hole in the bottom of the tin can of tobacco, it fills my room so full of poisonous smoke I can't even see the other side of the room. I just let the smoke sit there for about 20 minutes then turn the room exhaust fan on...SPIDER MITES BE DEAD! I've done this for many years, when I have a mite problem, NEVER have my plants gotten TMV! Hey, at least tobacco is natural and organic, because I do not use chemicals of any sort on my girls!
 
tikitoker

tikitoker

Active Member
I was reading an article from cornell and it said that TMV has not existed outside a laboratory since the 80's. CMV/CTV cucumber mosaic/curly top virus are said to be what most gardeners attribute to being TMV. I am a tobacco smoker and smoke while tending to all my plants and NEVER have I had any problems.
 
MajorCoco

MajorCoco

Well-Known Member
savinggrace1 said:
i cant see anywhere that it is caused by tobacco smoke?? it seems it is called what it is because it affects tobacco plants although thats just what i have found while researching on the web. my white widow plants have very similar symptoms QUOTE]

The point is that cigarettes contain tobacco which, if infected would spread the virus around in the smoke. I guess it is a myth that this can endanger cannabis, but that is no doubt how it started. Having done a little more research it is clear that what everyone here is referring to as TMV could only in fact be SHMV (Sunn-Hemp mosaic) or even one of the several other viruses that can affect cannabis.

The lack of verified scientific photographic examples of cannabis suffering from these viruses makes me wary of anyone claiming to know what it looks like. I'd need to see a source photo which included the lab analysis. Chlorosis is a symptom of so many other issues, assuming it to be viral is useless unless a proper lab "post-mortem" is done to confirm the diagnosis is foolhardy.
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N

nofunster

New Member
IVIars said:
TMV does not exist in cannabis plants. If anyone has any tissue samples that have been tested positive for it, please let me know. Every time people test for it, it comes back neg. It seems to be more of a def. or trait that shows up that some can get rid of with extra calmag.
Click to expand...
You obviously have no idea what the hell your talking yes that's tmv. Yes it exists I've been battling it for a year now yes they tested positive from a kit
 
N

nofunster

New Member
Parlika said:
Hey guys,

I have checked every sticky thread and diagnosis guide I can find and I have ruled out everything except Tobacco Mosaic Virus or a weird genetic trait.

It's not thrips, it's not heat burn - I noticed one leaf that looked weird, then I noticed curling, then more leaves started to exhibit similar traits as the plant grew.

My other plants are fine, and this was a new clone from a local medical dispensary - hence it being suspect. The room temp is at 75, the pH is at 6.5, using General Organics line of nutrients. Nothing out of the ordinary.

What do you guys think? It has the characteristic "one side curling" of TMV. Also the chlorophyll damage and bleaching/mottling.

If confirmed, what are you recommendations on course of action?

Thanks in advance guys. :)
Click to expand...
Yes that is tmv. Donor listen to anyone who says it's ph. Or nutrients it's the worst thing u can get I got it from planting when I was chewing and over a year later and 4 sets of seeds phaysan 20 I'm still battling it get a 115$ test kit and see cause your gonna need it for after its is so hard to eradicate it's easier to throw everything away including the room and start over
 
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