Does this look like thrips damage?

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GNick55

GNick55

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this is nice to have also.,
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mancorn

mancorn

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Hard to imagine it’s a problem of excess nutrients, I only use dry amendments so it’s slow release, then I’ll top dress if necessary. Starting to think I have been overwatering though trying to kill these bugs.
You’re probably right. The septoria is a fungus and has a little spore in the center and it would be more uniform across the leaf. Where as your burn is concentrated on the tips and edges which isn’t indicative of bugs or disease.
 
HashCake

HashCake

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You’re probably right. The septoria is a fungus and has a little spore in the center and it would be more uniform across the leaf. Where as your burn is concentrated on the tips and edges which isn’t indicative of bugs or disease.
Some of the damage is concentrated on the tips and edges but some of the leaves are burnt across the leaf like this, definitely thinking either overwatering or calcium deficiency at this point. Hard to imagine getting infected by a fungus when my humidity is generally 30-35%.
 
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GNick55

GNick55

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Some of the damage is concentrated on the tips and edges but some of the leaves are burnt across the leaf like this, definitely thinking either overwatering or calcium deficiency at this point. Hard to imagine getting infected by a fungus when my humidity is generally 30-35%.
leaf septoria is generally from overwatering.
pest can also carry diseases.
what are you feeding the plants and how much?
 
Teslajuana

Teslajuana

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Nute burn or light burn after spraying, I’ve seen this when I use too much peroxide when spraying plants during lights on. Also if that doesn’t fit i would start looking what’s going on with soil roots and feeding because your leaf tips are turning brown on your fan leaves and it’s so early in flower
 
HashCake

HashCake

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leaf septoria is generally from overwatering.
pest can also carry diseases.
what are you feeding the plants and how much?
I don’t feed the plants anything directly through the water, only dry amendments. When I switch to flower I’ll top dress the soil with 75% 2-8-4 and 25% 4-4-4 along with bat guano.
 
HashCake

HashCake

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I’m thinking about letting my soil dry out a day longer than usual and then watering as normal with calmag, if I see a reduction in the leaf browning I’ll assume it was either overwatering calcium deficiency or both.
 
Teslajuana

Teslajuana

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I’m thinking about letting my soil dry out a day longer than usual and then watering as normal with calmag, if I see a reduction in the leaf browning I’ll assume it was either overwatering calcium deficiency or both.
I was also thinking about your lighting? How many watts you hitting it at? Could be too much light as well? Just a thought …
 
Flexnerb

Flexnerb

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Possibility of it being leaf septoria.. leaf Sep as some call it.....this is just an opinion.
 
HashCake

HashCake

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I was also thinking about your lighting? How many watts you hitting it at? Could be too much light as well? Just a thought …
I have a 2000 watt LED with 360 watts of actual power draw inside of a 4x2, it’s 18 inches from the top of the plants. I was thinking the same thing but the fact that some of the shaded leaves are affected as well tells me it’s not.
 
Teslajuana

Teslajuana

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I have a 2000 watt LED with 360 watts of actual power draw inside of a 4x2, it’s 18 inches from the top of the plants. I was thinking the same thing but the fact that some of the shaded leaves are affected as well tells me it’s not.
Could be sprayed plants with too much peroxide and 18” of intense lighting….? Just a thought. Can you dial down the light? Dial down nutes, watering and lighting, see where that ends up leaves look really dark but could be the purple lighting.
 
Tracyfri

Tracyfri

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Now that I looked closer it does look just like septoria leaf spot. Don't know how I missed it in the beginning. I've dealt w septoria ALOT outdoors. Those roundis rust spots over the top of yellow patches are exactly what it looks like on outdoor plants. I used Zero tol 2.0 and it worked very well to stop the spread. Just a thought. Someone brought it up and it jogged my tired brain. I'd put a few dollars on it but I'm not a gambling man lol!
 
Teslajuana

Teslajuana

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Looks like it. Can you still smoke it after the fungi spores are pretty much everywhere from what I’ve read? It treatable but is it worth it? Is it a quick fix? The spores Sound invasive, even on humans and clothes and everything.
 
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Tracyfri

Tracyfri

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Looks like it. Can you still smoke it after the fungi spores are pretty much everywhere from what I’ve read? It treatable but is it worth it? Is it a quick fix? The spores Sound invasive, even on humans and clothes and everything.
Ive never heard of not being able smoke it. The zero tol will kill the spores. It's like strong h202 not exactly but your going to want to blast your entire grow space after harvest. Clean everything w a fine tooth comb ya know? It is OMRI listed not exactly cheap but great to have on hand.
 
Chem77

Chem77

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thrips are born inside of leaves, crawl out of them, feed on them, crawl into the soil where they pupate, then come out of the soil as an adult. You can find thrips on any part of your plant and in the soil, they’re some annoying ass bugs. And I didn’t burn my leaves, they starting showing that appearance and slowly spread like a virus growing more and more, and now at this point I can’t find a single bug no matter how hard I try but the leaf damage continues to progress.
I’ve had thrips so many times I couldn’t tell you how many. One more time, that is not thrip damage. They feed on the bottom sides of the leaves, really easy to see them. Usually clearish/green color. Like I said I’d your bug and good luck I think your going to need it.
 
HashCake

HashCake

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Well I’ve discovered that the issue is not related to bugs or fungus at all, the last top dress I gave to the plant was 7/14. I performed the h2o2 spray and soak on 7/30 and I believe the concentration of hydrogen peroxide killed off the majority of beneficial microbes in my soil basically starving my plant of food.

Upon realizing this I applied fox farms 2-8-4 and calmag with dechlorinated tap water 6.5 PH and she came back to life over night, a lot of frost that should of already been developing is now there and the buds are swelling. The leaves still have the damage of course but the new growth is all green. I’m contributing the issue to a phosphorus deficiency caused by an h2o2 flush during my plants last 1-2 weeks of food.

Thanks for everyone’s suggestions and I’ll keep you updated to see if that was truly the issue, and Chem77 thanks for the advice but you come across as pretty rude bro.
 
HashCake

HashCake

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Just a little update, 5 days after feeding the 2-8-4 and top dressing the same day everything seems to be back on track. Flower and trichome development is going full speed.

If anyone ever uses h2o2 for some reason while using living organic soil with dry amendments make sure you top dress after.
 
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HashCake

HashCake

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Here’s one of the ladies after a leaf strip removing all of the fan leaves I would of anyway, honestly I think the issue is solved this shit is looking dank!
 
CannaTech

CannaTech

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Yo a bunch of miss-info here, That was not any leaf spot bro it was a 100% a excess of K
It has nothing to do with the thrips. You can use pyrethrin on the plants in flower to kill them, but honestly so long as you do not have adults sucking your buds your fine.


Marijuana deficiency chart jorge cervantes
 
ComfortablyNumb

ComfortablyNumb

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Gypsum and a good read;

Basic Watering

Watering SOIL
 

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