Guerrilla grower's nightmare Leaf spot disease

i get leaf spot on my roses.... i had no idea cannabis can get it too. +1

kappainf said:

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I started noticing this a couple weeks ago, more recently, it got worse. Luckily, I found this thread last night. Found some copper today and sprayed em up. I posted these pics not too long ago trying to see if anyone was familiar with this. Anyways, Glad to know now.

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im glad this helped people cause when i found out what it was i was very relieved, i had asked people on here and they all swore it was fert. problems. I knew it wasn't. Hope we all save our girls.

This aint aimed at anyone in particular, but it does seem that there will always be some people who will give answers when they themselves don't really know if the answer is right or not. They are not at all objective. like they are arguing about what footbal or baseball team is "best" while they wear a fuckin t-shirt and hat for one team. They have no real interest in the truth. They just want to win the argument and be seen as an expert.

I am really grateful for this thread, too. I have been fighting this indoors for about 6 months. A lot fo that time was wasted listening to the advice of a guy very mush like the ones I describe above, who kept telling me I just wasnt staying on top of my neem spraying schedule like I should.

I now have all kinds of products, because I really need to get this sorted, but didn't know which to try next til I saw this thread. I am currently using copper spray, as well. I am a bit concerned, because past a certain point in flowering, I am going to really not want to spray them with anything if I can help it. But I will cross that bridge when I come to it. I am still in veg on everything.
I am also considering rotating the green cure and maybe some messenger in the spraying schedule. Messenger supposedly mobilizes the plants defenses and makes it better able to fend off shit like this, and also speeds up vegging.

Also, I read somewhere (Not sure about where the link is right ow) that amending your soil with some things called "trichoderma" and "Rootgrow", and also rockdust can help prevent things like this from happening. I think the theory there is that you are making the soil ecosystem ne that is inhospitable to the fungus/bacteria. I am investigating that, too. Anyway, the copper, will at least keep me from having to completely shut down until I get it figured out. I don't feel like I am researching to save all of my entire crop, so the pressure is off.

I feel like once I get this sorted, I am gonna be a much better grower, thats for sure.

Thanks again for startin the thread, tristynhawk.

FUUUUCK! Copper is not working. As soon as the humidity went above 65% (dehumidifier cannot catch up that fast to the rain) multiple spots on one leaf. This is the leaf closest to the air movement fan, which would indicate that the spores are being blown onto the leaves from the surrounding room. I cant keep pruning these girls to death like this.

I think there is some kind of giant mold issue or something in the house, FWIW.

Here's why I think that....I have a climate controller, and the CO2 count on the readout goes through the roof whenever the humidity goes up. Mold/Fungus breathe out CO2 and breathe in O2.

Any thoughts? Anyone? I am also gonna try Actinovate and Actinoiron, btw.

Nice to know, never seen it on my girls but it can STILL be due to a WEAK strain.. keep switching them out till you find a strain thats tough as shit. I had a skywalker covered in Powdery M and the plant next to it was Bubba kush and it HAD NONE, even after coming in contact.. the PM would not grow on it.. that goes for all diseases

it seems to be working well on my infected girls i had one really bad that i would pull all the yellowed dead leaves off and three days later it would be covered again since my first application which was sunday i went back today and it looks alot better there was a couple leaves but nothing like before, if you read the thread i pasted they say that it's incurable once infected you can just manage it, my plan next year is the copper as a preventive step like they suggest. Im sorry your plant is still bad off, maybe you have something else cause this usually a guerrilla grower disease not a indoor or backyard thing. Maybe a pic would help us so we can all see what to look for.

Sorry to hear about this. I am in the process of losing over 100 tomato plants right now from leaf spot. Copper is not working, just slows it down. Luckily it doesn't affect the lower tomatoes but as it climbs the plants it kills the upper buds so it reduces my yield. The only way to deal with it is prevention.

kindnugz said:

Sorry to hear about this. I am in the process of losing over 100 tomato plants right now from leaf spot. Copper is not working, just slows it down. Luckily it doesn't affect the lower tomatoes but as it climbs the plants it kills the upper buds so it reduces my yield. The only way to deal with it is prevention.

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do you feel the copper fungicide would be a good preventive medicine or do you have any other suggestions.

If you start with the copper in late june as a preventative, it can work. I just was busy and burnt out from all of the work getting everything in the ground and didn't do it.

Also, if the plants gets stressed, it attacks even worse. This year, the leaf spot started in my container tomatoes which I let dry out too much during the hot spell here in new england. It spread throughout within two weeks. Stay ahead of it and be vigilant. The tomato plants that I lollipopped resisted getting affected as well. Another tip is to spread the plants further apart and lay down black plastic because the spores are in the ground and can splash up onto the plants.

As a semi-clueless noob to tomatoes, I decided to go with more plants, closer together but trimmed to the main stem only. The proximity allowed for faster spreading and I have less tomatoes down low so my yield sux. I've never fought this stuff off on mj plants (they are inside in the grow cab!) but hopefully you can slow it down so it doesn't infect your buds.

Last week was nice and dry so the leaf spot dried up and I was able to remove almost all of the affected leaves. This bought me some time for more tomatoes to set but now it is humid and the plants are covered. I will post pics if I can figure it out, I'm a noob to this site.

My plant that was hit hard still looks bad like it might not see harvest, but the few i had that were at the beginning stage of it responded well to the LC spray.

I think from now on im going to spray every year around june 1st every two weeks up till they flower. I believe those guerrilla growers over at IC mag are right about the

Preventive powers of liquid copper, this disease just showed up on my plants two grows ago and i have seen it ever since. And i have grown this area for many years.

It's not even isolated to just one set of woods it's everywhere. The green brier in my area is ate up with it bad, as well as the sumac tree's.

indoors is anther story. your going to have to increase air flow. exhaust the humid air and maybe burn some sulfer. also let your soil dry out more. put a fan right on the pots. and if its a basement. try finding the source of the humidity. put up down spot/ rain gutter. seal walls. or make a sealed room floor and all and dont draw air fresh air from the basement draw from upstairs or outside. and then put your humidifier in the smaller room.

tristynhawk said:

http://www.icmag.com/ic/showthread.php?t=184996

im new to copying and pasting so tell if it worked peace guy's.

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Tristy- have to give you a big thanks for bringing this issue to RIU. I read the entire 22 page thread. You saved my ass (hopefully). My tomatoe and green pepper crop got absolutely wiped out by this and I had no idea what it was. I just thought they couldn't cope with our high summer temps. When the same thing started happening to my patch I sought answers and found this. I saw first hand how quickly it can run through a crop with my tomatoes and gp's so I'm not taking any chances. I wasn't able to find liquid copper in any of the big box stores or my local shop so I had to order it online. In the mean time I applied "Garden Dust". Its a bonide product that is basically an insecticide and fungicide in one (contains copper sulfate). Maybe next year you can just replace sevin dust with this and it will work as a leaf spot disease preventative. I hope this will hold off the problem until the liquid copper arrives...its kind of hard to get powder on the underside of a leaf.

I inspected the foliage around my spot and EVERYTHING has leaf spot disease. Its insane. I would have never recognized it. Guess I'll be spraying till the end of the year. Anyway- you are a good man for bringing this here. I would have been going mad adjusting my ferts otherwise. Rep+

The copper seems to be controlling the leaf spot somewhat, however, I wish there was something that worked better. Supposedly apple cider vinegar spray is supposed to be a natural remedy, but I'm skeptical.

Im pretty sure that the copper will work better as a preventive next year. Rather than a cure. Sucks period that we have to deal with this shit though.

happy growing all.....tristynhawk

Too tired to go into it all now, but I have been researching, and researching and researching. I agree, fizz on the airflow, etc for indoors. Thanks.The research bears that out, too.

Also, it appears that having a high pollution area makes it worse.

It also seems like having a really kick ass soil ecology can help, too. And finally, a product called Exel LG might help, as well.

Assuming everything sued is compatible with copper, and things are done as a preventative, and carried on, it may knock this shit back, but if pollution keeps getting worse all over, then this will prob get worse all over.

Fuck, I hope that all made sense. Going to bed.

Over on ICM, people are also finding Immunox and Eagle 20 pretty helpful. Myself with Eagle 20 and Liquid Copper. It can get spendy if you're doing an larger guerrilla grow and you want to effectively cover a whole large plant. The Eagle 20 costs around $53 or so online and you use so little a bottle will last a long while.

I read that over there bro, thanks for sharing.

howd i miss this tristy? this is all around and on my stuff. i thought it was bugs! i asked on here and they said n def too. i cant rep you anymore though hahaha

Sorry bob, i haven't heard from you in awhile thought about you though. The liquid copper treats it pretty good. But yeah i got tired if the n-def answer also, i knew it wasn't...lol

yeah i got pretty discouraged. there for awhile. problems, problems and more problems. i still have a few decent plants though. ill have to get on that copper