Im using nectar for the gods, base 4, monitoring the ph and my medium is sunshine mix #4 coco. Under a 600w and cool tube, the avg temp is 85 day. night 75 ish, little cooler. The tips do bend down, and the leaves that mainly have this problem have purple stems. Im about to go into flower and i have some clones. If it is just the defic than i will keep the clones. If it is TMV ill just chuck the clones and flower the mother.
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tmv or a defic?
- Thread starter pyromnd
- Start date
Difficult to make a diagnosis of TMV. It shares symptons with many other things, is not as common as some think, and often times it does no long term harm to the plants. They tend to grow out of it. You did not mention your PH. Check your PH, and also check the underside of your leaves with a powerful loupe or 100X microscope. You are looking for eggs or other signs of pests. This resembles broad mite or cyclamen mite symptoms, but could just as easily be a deficiency. I doubt it's TMV if it's not a Blueberry strain. TMV on cannabis not as common as some think, but it's symptoms are common, so it's often misdiagnosed.
blackosprey
Member
I agree that tmv is overly used and diagnosed, when usually there is something else causing your problem. with petiole stems purpling, that leads me in the direction of a nitrogen deficiency. And in pic two, the spotting that I see reminds me of a calcium deficiency in very early stages, and can be corrected.
sunshine #4 coco??? Is it that Sunshine Mix #4 advanced?
if your medium is mostly coco, drop the pH down to about 5.8-6.0, get runoff often and supplement a little cal-mg, if its just straight outta the bag sunshine 4 or sunshine advanced 4, keep the pH going in around 6.3-6.5 and add cal-mg anyways.
What kind of nutes are you using?
if your medium is mostly coco, drop the pH down to about 5.8-6.0, get runoff often and supplement a little cal-mg, if its just straight outta the bag sunshine 4 or sunshine advanced 4, keep the pH going in around 6.3-6.5 and add cal-mg anyways.
What kind of nutes are you using?
that is the first thing that came to my mind when i viewed the pics... too close to light source!
S
SeaMaiden
I won't call it tobacco mosaic virus, but it sure looks like a mosaic virus to me.
Time and time again the TMV topic comes up - tests have been done by MANY of the big names in the industry - and time and time again - it is NEVER TMV.
I have still not heard of a TRULY confirmed diagnosis of TMV in cannabis plants.
Only took a few folks to make this ripple in the community - now it will take 10 years to undo the myth.
There is not one confirmed case of TMV in cannabis - (to the very best of my knowledge)
dank.Frank
I have still not heard of a TRULY confirmed diagnosis of TMV in cannabis plants.
Only took a few folks to make this ripple in the community - now it will take 10 years to undo the myth.
There is not one confirmed case of TMV in cannabis - (to the very best of my knowledge)
dank.Frank
To be clear there are several mosaic viral variants known to exist in cannabis just not TMV proper, and most likely some new and undocumented as of yet. This is a case of mistaken nomenclature not a testament to the nonexistence of a highly destructive virus. I can personally attest to the absolute existance of at least one mosaic virus variant, of the most persistent order, that has been on the rise in cannabis populations.
That said nearly everyone that has some stress induced, latent genetic variegation or other environmentally caused leaf curling wants to blame it on "TMV". I can guarantee, however, that if you have the most virulent strain of the mosaic virus variants (whatever you choose to call it) you will know it without question.
S
SeaMaiden
That is due to a few factors, not the least of which is that the test for tobacco mosaic virus is testing specifically for that virus. What about cucumber mosaic virus? Tomato mosaic? Roses? Squash? Each test is specific.
The issue is that we cannabis growers find a term and convolute it and turn and twist its meaning. It's simply a matter of terminology, semantics if you will.
That doesn't mean, however, that the plant isn't clearly affected by something, and that something sure looks like a mosaic virus to me. Which mosaic is very difficult to determine due to two main issues--what test would be administered to cannabis? and what mosaic would be tested for?
Now, it seems to me that if this were simply a matter of variegation forms expressing themselves more frequently, then I would think that, just as with all other variegated forms we humans have concocted, we would see regularity in leaf form if not pattern. Think of a variegated Ficus benjamina, for example. The leaves may be crinkly, but that crinkle is equally bilateral, not twisting to one side or another. In fact, I can't think of a single cultivar where something like leaf or petal color manipulation may have led to ruffling or similar that *isn't* fairly equally bilateral in its expression.
S
SeaMaiden
There are several insect/bug vectors for mosaic viruses, and plenty of other diseases as well.
IIRC, isn't ChemD one of the lines known to have a mosaic virus or variegation pheno that's fairly strong?
IIRC, isn't ChemD one of the lines known to have a mosaic virus or variegation pheno that's fairly strong?
Several peeps tried to test her... all negative. I know not of a single confirmed case of hemp mosaic... despite all the jazz... or hemp streak... many other reasonable explanations vs a phantom virus for the probs peeps have...
Builtaforest
Member
ive seen the aforementioned variegation many times. it comes up in crosses as well.
grows fine. figured it was simply to be observed by not reacted to.
grows fine. figured it was simply to be observed by not reacted to.
