Virus in my growroom- expert advise needed!!

[thc43]

going by pics and your description so far, id guess a combo of underferted and overwatered or poor drainage..

fix to moist conditions and youll get fewer fungi diseases, citro might help alittle but usually when i get sick plants id go back to what i know, drop all additives from feeds just feed a flowering Nute and rootbooster ph6.0.

 

[mid-east-stone]

well, what now...?

well, what now...?

looked in the web and it seems that a virus in a plant is very much like aids in a way- as there nothing you can actualy do.
now, i looked on the other plants in my house and it seems as if they also have this virus.
can it be possible the the whole fucking appartment is infected??
what shell i do then?
it is soooo frustrating.
grrrrrr.

 

[Pimp Aurora]

I'm going to give all my plants a mist with copper fungicide at lights off time, i'll let you know if they improve over the next few days or whatever.

I'll be adding 1/4 sachet to 1 litre of water.


edit: thats my mix made, 1 teaspoon of copper fungicide to 1 litre of water, then ph'd it to 6.4, lights are due off in 2hrs 15mins so they'll get a thorough misting then.

 

[Charles Xavier]

Greetings avidgardener

Interesting thread.

A question: What do you surmise is the viral vector?

An observation: There is no evidence of a viral infection in the images posted. I am reticent to state that a viral infection doesn't exist; however, to make a diagnosis based on the evidence presented would be premature.

A fact: There can be no guarantee in the consistency of a fertilizer solution from batch to batch. There are too many variables to account for; this is the reason for the usage of terms like 'guaranteed minimum/maximum analysis'. Also fertilizer manufacturers routinely adjust (sometimes positively, sometimes negatively) how the fertilizer is made and the components of the fertilizer.

A statement: I believe the source of your problem is the intersect between fertilizer, growing method and cultivar.

Sincerely,
Charles.

 

[Grasso]

Hello,

last summer a seedling of Nirvana's Haze -- I had two seedlings -- showed these syptoms on the older leaves which so died prematurely. But the plant got rid of the problem by itself as it grew older and became a sexy female. I did not put it into quarantaine and did not see the illness again on other plants. By chance in late flower this plant was hit by a drought. The sunlight destroyed the resin of the slowly wilting being hence I did not smoke the weed. Your growing style or environment might weaken the plants. Toxic chemicals will not help. Calm down, resume what you have done, lay off for some time and wait!

Uli

 

[Lady 420]

Hi There
Something is devastating my grows and I suspect a virus or fungus is the culprit. I am an experienced grower but this has me stumped. First of all – I grow in Bio Bizz All-Mix soil and use Bio Bizz Gro and Bloom in 75% RO mixed with 25% tap water. I have ample in/out fans and 2000 watts of light. RH is around 50%. Temps 27c on 22 off. I have been doing this succesfully for almost 20 crops until a year or so ago.
The problems start at a couple of weeks into flowering. Small spots appear on the fan leaves which grow and rapidly turn brown. They spread over the leaf which eventually turns brown and drops. Some of the branches wilt and feel sort of hollow if that’s the word. You only have to squeeze them gently and they squash. They don’t appear to rotten inside. Later on the symptoms can appear anywhere on the plant. The spots tend to have a yellow halo round them.
This, whatever it is, is reducing my yields by 50% or more. I’ve tried cleaning like a madman between crops but to no avail (scrubbed and bleached everything twice). I’m on my 4th fucked up crop now and I don’t know what to do. Any help is really appreciated.
Cheers
IPAS62

These aren't symptoms of a virus. This is a nutrition problem. If anything is attacking the plants, its probably a fungus preying on the dead/damage portions of the leaves. If you looked under a microscope, you would most likely find rhizoctonia fungus conidia (spores).

 

[muddy waters]

I agree with the diagnoses of Charles and Lady, I'm not convinced it's a virus. I had similar doubts about some leaves on my plants (sorry no pics) and added ventilation and better draining, more pH stable substrate have mostly taken care of them. and there are other correlating telltale signs like interveinal chlorosis and pm, indicating less than perfect nutrition, rootzone oxygenation, and ventilation.

If it is in fact a virus, I agree that the vector must be identified before you can move on.

 

[Charles Xavier]

Greetings muddy waters

As usual, your post was succinct and astute.

Sincerely,
Charles.

p.s. I dislike calling another cultivators' skill into question, especially if they believe themselves experienced. However, I concur with your position.

p.p.s. Good to see you.

C.X.



Greetings Lady 420

I would never dream of arguing with a lady, so let me speak plainly. I believe you are clouding the issue and presenting inaccurate information. In a forum where information is vital, there can be no room for half-measures. Unless presented with the contrary, I will assume you mean well; however, if intent is not represented by execution then you are doing disservice to the community.

Sincerely,
Charles.



Greetings avidgardener

If you are offended in any way by what I have stated in your thread, I humbly apologize. As intimated above, I am not calling your skill into question. It is simply my belief that attention to the cultivating environment shall provide the clues necessary to solve this dilemma.

Sincerely,
Charles.

 

[avidgardener]

Hi. Thanks for all the replies

Lady420 - I just went and looked at a damaged leaf under a 30x microscope and saw something a little weird. On the damaged parts there are tiny white round things that I can only describe as looking like milky trichomes, some with a clear hair like thing sticking out. Could these be spores? These trichome lookalikes are definitely not actual trichomes as they are on a fan leaf and are present only where the damage is. They don't look the same as powdery mildew (which I have unfortunately encountered before). I thought I was safe from fungal infections - I've been running a sulphur burner and keeping humidity below 50%.

Charles Xavier - I have been using the same brand of ferts and soil for a few years with hardly any problems - certainly none like I'm having now. I believe that most UK growers who grow on soil use the same products as I do and I've not seen reports on other (UK) websites of anything similar to my woes. I agree - the nutrients have changed over the years. Only recently the recommended minimum amount of bio grow stated on the label doubled from 1ml to 2ml per litre. It is also much more watery than it used to be.

Finally - How do I eradicate this from my grow space? As I said - this is the 4th ruined crop .

Thanks again for your time.

IPAS62

 

[Pimp Aurora]

If it's fungal which I think the verdict is going to be then your best options imo would be to get some copper fungicide or Dithane 945 and apply and sorry to pull you up muddy but I think it's more general chlorosis than interveinal.

 

[muddy waters]

hello charles, thanks as always for sharing, your form is exquisite and i assure you quite gentlemanly even in disagreement, i believe you could teach me a thing or two about manners as well as growing cannabis. very good to see you here.

pimp, good call, i was unclear but actually referring to my plants, not avid's, which had similar leaf markings and death to those in the photos avid posted. but i do see some interveinal chlorosis for example in the 3rd and 5th photographs that were quoted by Lady, actually.

avid, is this happening with other strains? i'd look at ventilation and cultivar to resolve the problem.

 

[avidgardener]

Charles - My Dear Chap - absolutely no offence taken whatsoever. I feel graced and honoured to have your presence in my thread and look foward to many further comments from your good self.

Mr Waters - It has happened to the last 4 crops, 3 of which were clones (3 different strains) and my present crop - white russian from seed. All had the same symptoms at 2 or 3 weeks flowering. I have good ventilation IMO. An RVK150 660m3/hour for a 7'x6' room with 2000 watts. Also 2 intake fans and 4 powerful oscillating fans.

Cheers

Ipas Avidgardener

 

[muddy waters]

avid, i see, well in that case i am at a little bit of a loss. you could consider a foliar application of an aerated compost tea around the beginning of 12/12, with the thinking that beneficials on the leaf surface would strengthen the plants' immunity and outcompete fungi for nutrients? i await charles xavier's advice on the matter, though.

 

[gearbong]

I’m still learning but I would like to suggest an Mg deff. I have been having similar problems/ damage when introducing my ladies to 12/12. I stopped it this round.

As far a virus/fungus control goes I have been using some garlic/pepper mixture. I spray it on once a week if I am paranoid about that stuff in the garden. Still hasn’t had a problem with fungus/mold/insects. I also have some of the chemical mold controls but I have yet to use them.

 

[Charles Xavier]

Greetings muddy waters

Your words are an eloquent testament to your even temperament; it is a pleasure to engage in discourse with you.

you could consider a foliar application of an aerated compost tea around the beginning of 12/12, with the thinking that beneficials on the leaf surface would strengthen the plants' immunity and outcompete fungi for nutrients...muddy waters

You display sound reasoning and this advice is a prime example as such. I believe you comprehend the philosophical concept of learning and teaching being one and the same.

Be assured that your display of support does much to increase my modesty; it is neither overlooked nor unappreciated. Thank you.

Sincerely,
Charles.



Greetings avidgardener

First, allow me to thank you for your kind indulgence. It is not my intent to derail or off-centre your thread. You've brought a matter of real concern to the forum and I hope that you are confident that your matter is not being taken lightly.

I believe your problem stems (pun intended) from the choice of fertilizer and its application. Consider incorporating (or increasing) the amount of dolomitic lime in your medium. This will effectively buffer the soil (slightly increase and stabilize the pH), as well as, provide the Calcium that the plant needs in the early flowering stages.

Also consider a 50/50 split RO/tap water; again to increase Calcium and stability. That the symptoms manifest two weeks after the commencement of the flowering period is especially telling.

A combination of Canna's Rhizotonic and Botanicare's Liquid Karma may prove helpful.
(Note: Liquid Karma can't do half the things its manufacturers claim it does. It does, however, contain humates, carbohydrates for the beneficials in the medium, and phytohormones and in this way increases plant metabolism, vigour, immunity and the stability of the soil)

When you attempt another garden (don't fall to discouragement), document every step and variable. Start a thread in the 'diaries' documenting the process, in so doing both yourself and the community would be better equipped to remedy (potential) adversity.

Sincerely,
Charles.

 

[moonymonkey]

me thinks ph...have you changed the lighting,or the amont of hours,they are runing?...sometype of enviorment problem,afecting ph,or the genetics of those clones...went threw somthing very similar to this...peace moon/

 

[Blackmelo]

Hi avidgardener,
I once read about a virus that could infect cannabis and was quite shocked to find out this could actually happen.
Would be some bad luck if you did actually have that but I would not assume it can only be that if I was you. There coud be lots of reasons for bad looking leaves and low yield. The fact that you saw some weird stuff through the microscope around the affected areas kindof sounds like some sort of fungus maybe?

Well hopefully you can figure it out.

ps: you asked if the virus can be spread to other plants by smoking the infected weed and unfortunately the answer is yes it can be.

 

[avidgardener]

Hi
I started this thread around 2 1/2 years ago and wanted to give an update and to see if anyone has seen this before.
To anyone who can help me identify this problem - please look at the original post and pics. I've still got the same problem which has been affecting my grows for maybe 4 years now. I have it slightly under control - yield is better but the same leaf symptoms show up every time. It now shows up much earlier than it used to - as early as 2 weeks after rooting/sprouting.
Not much has changed from the original info - I now use half RO/half tap water as opposed to 75/25. My grow is smaller so there's less light.
The product that I believe has helped me (after trying many different solutions) is called Rootgrow. It's a friendly fungus which I use at every pot up and I'm convinced it does helps ward off the disease/fungus/virus (or whatever it is) slightly.
I also think the problem originates from outside the building I grow in. There's trees, lawn, flowers, bushes pretty close to the door to the grow so it could be coming from anywhere there. I've somehow manage to avoid pest problems apart from the odd fungus gnat.
Anyway please feel free to have a say if you think you can identify this problem. I would love to know what it is and how to be rid of it.
Thanks for looking
avidgardener

 

[Jenn]

Perhaps the TMV virus? Seems to be all the rage these days -

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

- Jenn

 

[lordbudly]

u say u use half ro half tap, have u tried calmag yet in your 2 1/2 years of tribulations?