Black Tips Help Please

[Quantummist]

Hello all.. Gots a prob.. I have a few plants outdoors and I am getting some of the new growing tip turning Black from the center and shading to the surrounding leaves . It looks a lot like mildew you see in a shower but it does not rub off. I have tried a fungicide and it has no effect. I pick the tip off and next time I go back I have a few more with it starting to form at the tips.. I can supply photo if needed but if anyone has any idea what I could do to correct I would be very appre... I have plants right next to the one that doing this crap and it has also had a couple of tip form this blackness but it seems to be on one plant mainly and its one with a heavy skunk smell while a thin leaf indica has none forming on it .. both plants that have it are sativas.. Any Ideas?

[Quantummist]

Heres what it looks like the best I could get it.. I lightened the images cause the leafs are a fairly dark green. Anyone with any good ideas please let me know,,

http://paulr.mays.com/blacktip1.jpg
http://paulr.mays.com/blacktip2.jpg
http://paulr.mays.com/blacktip3.jpg
http://paulr.mays.com/blacktip4.jpg
http://paulr.mays.com/blacktip5.jpg

[Weedhound]

You got me. It does look like a fungus doesn't it? Also better specs would help alot but try this link and see if it helps.

International Cannagraphic Magazine Forums - The Complete guide to Sick Plants,pH, and Pest troubles! (http://www.icmag.com/ic/showthread.php?t=11688)

Good luck. :)

[Quantummist]

Don't know what specs would help.. pot plant.. well feed .. growing great.. Outside in a spot where its direct sun 6 hours a day and shaded a bit the rest of the day. All plants big and bushy and look very healthy over all.. All just starting flowering .. willl admit humidity levels around here are pretty high but its outside and thats one outa my control. Can't find any infestations of creepy crawlies.. You can't rub the black off and its jet black radiating from center of new tips. As I said.. note that the tips that are fully covered start deforming and shriveling up , I have left them on the plant long enough to see if the actually kill the tipps all together as it seems to just keep spreading and I start seeing it on tips around the one thats fully infected so I pick off the tip before that happens now. Leaves are all good color and growth rate is good so I see no issues from a cultivation perspective. a couple of days ago I picked a tip that was turned mostly black and sprayed it with a full strength Spectracide Fungicide untill its was thick covered .. The stuff was heavy enough to Kill the tip but not sure it killed to black stuff.. If I use it in a lighter cover it seems to not effect it what so ever.

Thanks for the links I'll keep looking for answers and if you run across anyone with any ideas pass em my way before I lose this grow from this crap.. Paul

[Chronisseur]

I have no idea! But...could that possibly be an effect of big temp drops? I think I remember seeing some reddish coloring on a few girls after some BIG temp fluctuations. I very well could be wrong, but now I'm very curious!:wtf:

[Weedhound]

Well someone around here has to know. It's a matter of getting the photos and info looked at.

I don't usualy reccomend this but in your case Quantum.....here's what I would do.

Start a new thread titled in caps DOES ANYONE KNOW WHAT THIS IS? in plant problems section and put in your photos and all specs you can think of.... type of soil, day temps, humidity, what are you feeding, how often are you waterng, ph,age of plant, clone, seed etc etc. I'm pretty sure that will get peoples attention.

I think you need a new sales pitch to figure out whats going on here and if think you may need to know fairly soon.

good luck.

[the image reaper]

I've never seen that on cannabis plants, but my pepperoncini peppers have black areas like those, isn't harmful, or anything to them ... I know that's no help, sorry ... I've never had a 'purple' strain like everyone is talking about these days, I wonder if that is what's happening ??? ... clueless :wtf:

[Weedhound]

It can't be the strain....he says it's killing off his leaf tips. Isn't that the weirdest? Now I REALLY have to find out what it is. ;)

[stinkyattic]

Looks purple to me.
So it is actually KILLING the affected tissue? You're certain of that? Because if it isn't killing the leaves... I have a theory.

The rest of the plant looks healthy.
Have you ever seen partial albinism in cannabis? The plants show random patches of white tissue. The fact that cannabis CAN be variegated makes me almost wonder if what you are seeing is simply a purple variegation and it is only coming out now because of temperature changes- have you been dropping into the low 60s at night, or lower?
In the meantime, DO NOT PINCH OFF AFFECTED PARTS!!!! Those are bud sites. You'll kill your yield.
Do you know the strain? Please post it so I can quick have a look and see if any of its near ancestors are known to carry purple traits.

[Weedhound]

That's what he said a couple posts up....he waited to see what would happen and eventually the affected leaves became shrivled and deformed. Also said it seems to be spreading.

Edit....my bad....they ARE shrivled and deformed...but he's waiting to see if it kills the leaf. He did spray Spectracide on one leaf and killed IT with fungicide but not sure if it did anything to the black stuff.

It's FREAKY huh???? :eek:

[stinkyattic]

That is truly bizarre. Sounds like it could even be viral, and it would be the first time I've ever seen the effects of a virus on cannabis. Where the heck is rhizome when ya need him!?
look what I found, but no pics... could start by googling the individual diseases...
Diseases of Hemp (Cannabis sativa L.) (http://www.apsnet.org/online/common/names/hemp.asp)

[Weedhound]

That is truly bizarre. Sounds like it could even be viral, and it would be the first time I've ever seen the effects of a virus on cannabis. Where the heck is rhizome when ya need him!?

Exactly.....that guy is such a slacker I can't even believe it. :D

[Weedhound]

so I just went through my readers digest problem-solver....which didn't but kept coming back to things like black mold, black mildew, blackspot, all fungi related.

I did see a few viral things as Stinky mentioned but I certainly don't know enough about cannabis plants to tell you whether it is or isn't......especially if Stinky's never heard of viral probs w/cannabis.

The very first one i read....black mildew....talked about other abnormal coloring on the flower....including white like you mentioned as well Stinky. just an observation.... ;)

[Chronisseur]

I've got two theories on my "new dark purp growth"
One is already mentioned. (temp drops)
2.) The same time I introduced superthrive it also got cold at night, making it harder to judge the cause. I DO believe I used too much ST to start with, but those two elements were the ONLY changes in environment, which created almost the EXACT same outcome as the pix above.

Did you recently introduce superthrive by any random chance?

[Weedhound]

Chron.....as in too much nitrogen turning the new growth darker..... HMMMMM.......I like it.....I could see it......anyone?

[stinkyattic]

There ARE viral diseases of cannabis- at least 4 or 5 of them- mostly mosaic type viruses.
The white I mentioned is simply albinism and shows up somewhat commonly on the leaves. I've seen it in my crops before. I was using it as a reference for patchy coloration being possible on this plant.

Chron, interesting point. I will then ask the OP, did you pee near your plants (deer repellent)? I'm not being fresh, the outdoor grower I know does that regularly. Heck, I've added a bit of repellent to his plants myself, lol. Human urine contains at least one compound found in ST.

[Weedhound]

Ok....going to back and look at viruses then. I skipped reading about them because I can't even read what you said right.....my sucky badness....:(

[Weedhound]

Ok....going to go back and look at viruses then. I skipped reading about them because I can't even read what you said right.....my sucky badness....:(

[Chronisseur]

yeah...my grandpa just had to get thicker glasses too! And he reads everything twice to get it;)



:D

[Weedhound]

Cork it you young whippersnapper....:D

[Chronisseur]

LOL:D

So, I'll give you back SOME credit and say that I think you're on to something with the nitrogen!:thumbsup: I think the superthrive made MORE available while the temps decreased, ultimately USING less. The logic makes sense in my situation, but I'm not sure the conditions were even similar in "Quantummist's" (is it?) situation.

[Weedhound]

Well I've definitely noticed that with my grow nutes (Pro Gro) I cannot add ANY superthrive or its too much nitrogen and shows pretty quick so personally I think ST has a pretty good kick to it.

I'm not of the group that does any deer repelling of that kind so can offer NO experience there.....:wtf:

[Chronisseur]

...my "eyeball" measurements may have gotten the best of me.:(

[Quantummist]

Well I have taken all the thoughts into play and let me say that so far I haven't found the problem answered. Its not a Purple its Black and may seem that in the photos as I had to lighten the photos in order to see the problem a bit better. But it had the look of Black Mildew. Its passable as I have found it on 2 of my other plants which are completely different strains and its was only on 2 budding tips that I touched after touching the tips on the plant with it on several tips. SO I now use latex gloves and have started using a mild bleach to rinse off between handling the plants.

This tells me its not a genetic variance of the one plant, And since all my plants are in the same area and receiving the same nute mixes and all are looking in perfect health I don't see a nute over/under issue. I only have 4 plants 1 a tall one with wide indica type leaves and is earliest flower of them.. I'm a bit afraid its actually a Rope Hemp plant but gona let it finish if its good ok if not theres always hash, one is a low growing very bushy thin leaf girl that perfect. The other two I'm useing Scrog and have them under a chicken wire top and are spread out over a 8 X 4 foot area . Its one of these in the scrog setup thats the one that has ongoing black tips that are on maybe 15 to 20 % of this plant. It seems that its not readily transfered to the plant next to it as the one next to it has had maybe 2 or 3 tips affected that I have snipped off .

But as a check a couple days ago I rubbed my finger on an affected tip and went to the tall indica and rubbed a bud on a lower branch and a tip on the short sativa and both tips formed the Black Tip. I clipped em off today but its deff infective.

So far I have tried Fugicide and made a mild bleach spray and tried both.. No Effect on the black..

And Yes if left alone it Kills the new tip and spreads to the stem and all surounding leaves causing the leaves to first curl then droop then die. So picking them off as I find them is the only solution I see so far as far as yield If this keeps up and threatens my good plants I'm a gona pull the bitch up by the roots..!! If anyone comes up with any ideas I have yet to try please let me know.. Thanx folks..

[Ganja Guerrilla]

I believe I have seen this before, I dont know what it is.....
but the symptoms seem to be the same , I believe it a viral disease.

although we dont know its the same thing I have seen exactally I instructed the plant owner to try 70% Neem oil...Neem oil kills most moulds midews & diseases.....it did stop the problem!

lets hope its the same thing & it too can be halted

[Weedhound]

I'll place my bets on Stinky and Ganja and say a virus as well......be aware I'm only parroting here but I think they both are the shits with knowledge. I DID look in my Garden Problem Solver and it DID talk about viruses but only in a very, very vague way (plants get viruses) with no info except destroy the infected parts OR the infected plant as the virus is spread by insects. Perhaps that is part of the neem oil treatment GG is talking about.

I'll check back. Good luck.

[stinkyattic]

I would be very hesitant to go that heavy on neem
It easitly suffocates plants
I've done it before lol.
With roses, there are 2 solutions:
-Destroy plant
-Take buds and bud onto a healthy rootstock, or perform micropropagation, and hope to hell that the virus had not spread to the new tissue yet, and then destroy the original host plant
In your case, the symptoms showing in new growth is not a good sign, becasue it means you can't get virus-free clones.

[Quantummist]

Well boys and gurls heres the latest .. What ever this crap is its tough stuff. I have treated with every thing I can come up with and its done nothing except stunt and damage the plant and has not even slowed the Black stuff from showing up on about 50% of new growing tips. It has also been transfered to a couple bud tips on each of the plants in the area so I think that its a spore based pathogen and transfered by either my touch or insects feeding about.

Picking off affected tips gets rid of it and it does not seem to spread as a virus through the plants structure and onlt grows where it lands and spreads from there. It absolutely looks like Black Mold but even a 2 Tspoon of bleach in a 1/2 gal of water has no effect on it, neem = nothing, 2 different spectracides have had no effect on it. If left to grow I think in a couple of weeks I would have total infection of the whole plant new growth.

So to keep it in check I have decide to cut the girl down and burn in the fire pit . It seems the only plant that is fully involved and the others are thriving, Its starting to look really sad and it mostly due to me poisoning it so much already.

Sux but sacrifice for the good of the whole I guess..