Interveinal necrosis & rust spots. Diagnosis help. Teros12 & Athena Pro Line

[BudzAldrin]

How do you kids get these jobs running weed ops? Very clearly the plants need B. Not only would I fire any pit grower who couldn't identify an obvious B deficiency I'd take him to court for lying about his credentials. And the judge would give me anything I asked for because this shit is getting old, how no one is qualified for their position in this country anymore.

 

[flipflop64]

How do you kids get these jobs running weed ops? Very clearly the plants need B. Not only would I fire any pit grower who couldn't identify an obvious B deficiency I'd take him to court for lying about his credentials. And the judge would give me anything I asked for because this shit is getting old, how no one is qualified for their position in this country anymore.

u mad?

 

[Trash_2002]

Any improvement there @flipflop64 ?

Cheers

 

[flipflop64]

Its coming back.

I once again raised the lights & will drop back EC because od the tips

Either light stress or lockout
I have the same strain under a different light and no problem there (same nutes, same EC + they are smaller and less light)

What do yall think

 

[GNick55]

Its coming back.

I once again raised the lights & will drop back EC because od the tips

Either light stress or lockout
I have the same strain under a different light and no problem there (same nutes, same EC + they are smaller and less light)

View attachment 2048338View attachment 2048339View attachment 2048340


What do yall think

mmm pretty sure though not for sure that this is not light stress..
i think you should be listening to @Trash_2002

 

[GNick55]

mmm pretty sure though not for sure that this is not light stress..
i think you should be listening to @Trash_2002

your growing method i have never done before..

 

[Trash_2002]

Its coming back.

I once again raised the lights & will drop back EC because od the tips

Either light stress or lockout
I have the same strain under a different light and no problem there (same nutes, same EC + they are smaller and less light)

View attachment 2048338View attachment 2048339View attachment 2048340


What do yall think

When you raised the light's it got better for some weeks right (or at least it didn't got worse)?
Now getting worse again after light intensity increased?

I see a little light stress, and maybe a hint of calcium deficiency starting, but Athena uses calnit witch has plenty of calcium so could be a small lockout happening or probably just a case of upping the calnit part in the reservoir.

Said that, they look pretty healthy overall, don't see anything of major concern.

How many weeks flowering? What ppfd atm? And co2 ppm?

 

[flipflop64]

Sorry guys i didnt get a notification this time, idk why
Week 5 flowering starting tomorrow. 1000ppfd, 1000ppm Co2. 5.9-6 PH
I am feeding 5 times a day to achieve 20% dryback (measuring with substrate sensor)
stable 25 degrees C and 45 -50% RH

I raised lights so they are around 70cm away from the canopy. I does look a lot like light stress. I also reduced from 3EC to 2.5EC because some plants showed signs of nutrient burn. (Browning/Yellowing around the edges and tips) just to make sure
I feel like its a combination of too much light and drybacks being above 20% (Media EC peaked at 10EC)
I removed all damage and i will see tomorrow if the problem is resolved. Feel like it got a bit better.
I will update tomorrow, thanks guys

 

[flipflop64]

 

[JKash]

To my eyes looks like light burn damage, lm301h diodes are very strong. Had some strain show it like that too when going from indoor to strong sun in greenhouse. Other cultivars may fry the tip and yellowing looking like mag def but mainly at tops when in fact it's light burn.

I got some serious light burn here... funny how it's only on these 2 colas

 

[Trash_2002]

Sorry guys i didnt get a notification this time, idk why
Week 5 flowering starting tomorrow. 1000ppfd, 1000ppm Co2. 5.9-6 PH
I am feeding 5 times a day to achieve 20% dryback (measuring with substrate sensor)
stable 25 degrees C and 45 -50% RH

I raised lights so they are around 70cm away from the canopy. I does look a lot like light stress. I also reduced from 3EC to 2.5EC because some plants showed signs of nutrient burn. (Browning/Yellowing around the edges and tips) just to make sure
I feel like its a combination of too much light and drybacks being above 20% (Media EC peaked at 10EC)
I removed all damage and i will see tomorrow if the problem is resolved. Feel like it got a bit better.
I will update tomorrow, thanks guys

25c with leds and co2 is no good tho, running co2 you want air temperature at 28.5-29.5c to get leaf surface temperature close to 27c with co2. you could be pumping 1200ppm co2 at week 6, only drop it to 800-1000 last two weeks, temperature i would drop only last two weeks too, its the ideal range. this is the only way to optimize photosynthesis with co2, higher temperatures and high light intensity.

 

[Itscheese94]

View attachment 2049352View attachment 2049353

pic above looks like classic nutrient burn to me, that shows as a toxicity from certain nutrient levels being to high could be p or k. hence why it looks like a calcium problem. certain nutrients are blocking calcium uptake so shows as a burn.

 

[flipflop64]

I will raise temps mate, thanks

 

[flipflop64]

pic above looks like classic nutrient burn to me

yup i agree. i didnt want to drop EC any further than 2.5
I am running UV+IR diodes in my LED fixtures which made me think its light burn on the latest pic
I never ran UV or IR before so i have no clue if I should be more careful.

 

[Trash_2002]

View attachment 2049410
I will raise temps mate, thanks

the table i posted last page is pretty good starting points tho, week 6 you should be around 26.5-27c, 1200ppm co2.

they could be showing problems because with low temps you get lower photosynthesis rate and you get nutrient burn/lockout much easier at those high EC, if you pump up photosynthesis rate they will eat more and faster easier for them to handle high EC.

 

[flipflop64]

pic above looks like classic nutrient burn to me, that shows as a toxicity from certain nutrient levels being to high could be p or k. hence why it looks like a calcium problem. certain nutrients are blocking calcium uptake so shows as a burn.

you are talking about the burnt edges / potassium def looking pic correct?
the bottom/second one in that post?

 

[Itscheese94]

yup i agree. i didnt want to drop EC any further than 2.5
I am running UV+IR diodes in my LED fixtures which made me think its light burn on the latest pic
I never ran UV or IR before so i have no clue if I should be more careful.

had the same problem years ago, fixed it my self from trail and error. i also remember stuff pretty good so im sure its that.

 

[Trash_2002]

that table is from the senior cultivator/biologist at hawthorn (yep I know the second monsanto in the world lol), but those guys have 10 huge grow chambers with fully independent controlled environments for testing stuff, and that chart is meant for high yield optimization with co2 and its pretty accurate generally dialed in stuff, no BS.

 

[flipflop64]

that table is from the senior cultivator/biologist at hawthorn (yep I know the second monsanto in the world lol), but those guys have 10 huge grow chambers with fully independent controlled environments for testing stuff, and that chart is meant for high yield optimization with co2 and its pretty accurate generally dialed in stuff, no BS.

i will dial all that in tomorrow when i am back at the farm. appreciate you sending, its really useful :)

 

[flipflop64]

New problems. I dialed in the enviroment, the old burn is mostly gone but now I got leaf margins curling up and burning. Looking like some potassium issue.

Tried EC 2.5 and EC 3 Athena
PH 5.8-6
1000ppfd
26-27C
55-60RH

20% drybacks over night from 60% VWC to 40% VWC with peak EC of 8-9 in the Rockwool