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Mosaic/Tobamovirus or something other?

winst0n986

New member
Hello all,

First time poster here :pimp3: but long time forum stalker.

I have a slightly sick plant and wanted to get some possible input. Here is as much info as I can give about my setup:

System: 6 gallon res. DWC/Bubbleponics home-made system. 3" net cups with 5.8 PH balanced rockwool cube in thoroughly cleaned Hydroton.

Light: 400W MH veg (have the HPS for flower ready to go).

Ferts: Using the Fox Farm trio with the Hydro version of the Grow Big. I went almost exactly according to the chart, but kept my PPM a little less than what was recommended. Right now I am 5 weeks into veg (my scrog is fairly large) and I am at 1300-1400 PPM every time I check with my PPM meter. I have been topping off with 1 GAL water every 3-5 days at this point, and adding back 1/6th of my nutes (as it is a 6 gallon res and I top off 1 gallon at a time).

Water: I AM using tap water. I tested my tap water right out of the tap at 45 PPM (extremely good tap water according to the little chart on the PPM meter). It comes out right at 7.0 PH. After adding my nutes it usually balances out to about 6.2 PH and I add a little PH down to bring it right to 5.8.

Seeds: 2x Barneys Farm Critical Kush 1x Dinafem White Widow (all feminised).

I have one of those cheap yellow PH meters, but I calibrate it before every PH test and have not seen my PH fluctuate by more than .2 usually it is ALWAYS spot on 5.8 when I check it. I have checked with the manual PH drop test kit as well several times and it is always spot on to what the meter is reading.

I have been using 2tsp/GAL AquaShield once a week since the beginning of the grow.

From the research I have done on my own here and at other forums I am leaning heavily towards some sort of Mosaic/Tobamovirus, but then every time I convince myself it is, I see some pictures of PH imbalance or overfeeding/lockout that look somewhat similar. Then I will look at TMV or CMV pics and go back to convinced it is that.

I will post the pictures now (all from the same critical kush plant as the other one and the WW don't seem to be effected as much though they have shown some minor similar signs), and please if you guys need more info ask me!

I have ordered the ImmunoStrip test kits that test for a few of the Mosaic variants so I will know for sure I supposed about at least those specific viruses fairly soon.


1.) Notice the weird yellow splotching. The leaf is also very crinkly/textured and looks blistered to me. This seems to "go away" a little a the leaves get older.



2.) The new growth there has 1 very yellow/damaged leaf. This is the first time I have seen something this damaged on the plant, however there have been some "incomplete" leaves and some weird ones before, but nothing to this extent.



3.) More mottling/splotchiness on the leaves.



4.) A leaf that I trimmed off to examine more closely/get a pic of the mottling/splotching.



Overall the plant seems to be doing pretty well still, but I am worried about when I put it into flower as I have heard the virus can go crazy in the first 2 weeks of flowering.
 

winst0n986

New member
As a small update, I do have a 100x loupe - have examined several of the off looking leaves and not seeing any broad/spider mites. Where exactly should I be looking for them to rule that out?
 

RetroGrow

Active member
Veteran
Look on undersides of leaves. You are looking for eggs, which are pretty easy to see with a 100X scope. The mites themselves are hard to see as they hide and are microscopic. Google "broad mite eggs" to see what they look like. Also Google cyclamen mite eggs to see the difference. It is almost certainly one of those.
 

winst0n986

New member
I literally just looked over about 10 different leaf trimmings - I needed to thin things out anyways so I trimmed off any that had signs of the mottling/crinkling and were blocking out potential bud sites.

NO signs of any eggs so far that I can see. I see from google that they look like little noduled oval shaped things, but I am just not seeing any. Is my loupe too crappy (it was just a fairly cheap 60x-100x little LED light loupe thing from amazon) to see them or would I be obviously seeing them after analysing the hell out of the underside of 10 or so leaves?
 

RetroGrow

Active member
Veteran
You should see them with that if it is really 100X, and if you have a bright light shining on them. It could be something else.
 

winst0n986

New member
Retro,

Thanks for the suggestions/help. Lights are off right now but when they come on again I will do a round 2 on the checking with the 100x loupe. The loupe has a built in light but maybe I will add some additional lighting to make sure I am getting a good view.
 

winst0n986

New member
The ImmunoStrip test was negative for anyone curious. Seems like it is some kind of deficiency/lockout as I have no signs of pests at all in my thorough examinations. Maybe my cheap yellow PH meter is failing me hard, or I am off on trace minerals or something.
 
That definitely looks like a virus to me. We had a Grape Krush plant that looked exactly like that even when it was perfectly healthy. It never hurt the yield, so I wouldn't be too concerned if I was you. Those strips definitely don't cover every virus out there.

It doesn't look like Broad/Cyclomen mite damage. That kind of damage will occur all over the apical leaf sets, as the mites are attracted to the warmest areas of the plant, and will typically show quite a bit of leaf twisting and contortion as well as 'virus like' blotching. So yeah, I wouldn't worry too much. Every thing else looks great and I bet your yield is going to be just fine. :)
 

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