What's this? (discolored area on leaves)

[Jungle]

I don’t really find any pictures that look the same…

Thanks!

[Budz]

Looks like pH issues or calcium deficiency.

Calcium deficiency in marijuana plants

Nutrient deficiencies in marijuana plants

Marijuana Grow Guides

Although it’s almost to be expected with an old fan leaf of that size. Whole plant picture? Ticket?

Experienced community members and expert staff will be better informed and more capable of providing a more informed answer.

COPY/PASTE the below list into your forum post.

Answer these simple questions the best you can.
If you do not know, or do not use something; Just say so; Or post
NA (non applicable)

-What strain, Seed bank, or bag seed (photo or auto) :
-Age of plant/what week of flower :
-Method: Soil w/salt, Organic soil, Hydroponics, Aquaponics, KNF :
-Vessels: Pots, Grow beds, Buckets, fabric pots
:
-PH and TDS of Water, Solution, runoff (if Applicable):
-PPM/TDS or EC of nutrient solution if applicable :
-Method used to measure PH and TDS :
-Indoor or Outdoor if indoor, size of grow space :
-Light system LED, MH/HPS/CMH/Fluorescents, or other :
-Actual wattage draw of lights :
-Current Light Schedule:
-Temps; Day, Night :
-Humidity; Day, Night :
-Ventilation system; Yes, No, Size :
-AC, Humidifier, De-humidifier :
-Co2; Yes, No :

If growing Hydro some additional questions:

-DWC? RDWC? Autopots? Ebb and Flow? Other? :
-Distance of liquid below net pot (DWC) :
-Temperature of reservoir :
-TDS of nutrient solution :
-Amount of air to solution :

Always try to upload a clear picture in white light of any issues you may have to allow the community to assist you.

Add anything else you feel would help us give you a most informed answer should be included. Feel free to elaborate, but short and to the point questions and facts will help us help you in a more efficient manner

Thanks

[Jungle]

Yea, ok, here’s a current bug ticket, but I think I figured it out.

Last week when I changed nutes, I mis-read my meter (7.5gal actual, but dosed for 9gal), and mis-read the label on CalMagIc (ml/L vs. ml/gal), and as a result under-dosed CalMag by about 50% and over-dosed micro/grow/flower by about 15%. I’ve changed the nutes now and dosed properly I think

Rookie error.

• What strain, Seed bank, or bag seed (photo or auto) :
  Allegedly Raspberry Kush photo, acquired as a clone
• Age of plant/what week of flower
  In nutrients 7/4/21; starting week 5.
• Method: Soil w/salt, Organic soil, Hydroponics, Aquaponics, KNF :
  DWC
• Vessels: Pots, Grow beds, Buckets, fabric pots:
  NA
• PH and TDS of Water, Solution, runoff (if Applicable):
  pH is controlled by a Milwaukee pH controller running a peristaltic pump with 10:1 diluted pH Down, and is always 5.8-5.9.
• PPM/TDS or EC of nutrient solution if applicable :
  tap water = 150ppm, nutes = 1140 - 150 = 990ppm, target = 800-1000.
  GH Flora 3-part plus CalMag and Hydroguard
• Method used to measure PH and TDS :
  pH = Milwaukee probe
  PPM = bluelabs pen
• Indoor or Outdoor if indoor, size of grow space :
  Indoor, basement, ~100sq ft grow space.
• Light system LED, MH/HPS/CMH/Fluorescents, or other :
  HLG 320W XL QB v2 Rspec
• Actual wattage draw of lights
  320w
• Current Light Schedule:
  18/6
• Temps; Day, Night :
  Basement steady at 69.8 - 70.1F
• Humidity; Day, Night
  Basement steady at 49-53%RH
• Ventilation system; Yes, No, Size :
  720cfm 8" fan & charcoal filter in area (not exhausting)
• AC, Humidifier, De-humidifier
  No
• Co2; Yes, No :
  No

If growing Hydro some additional questions:

• DWC? RDWC? Autopots? Ebb and Flow? Other? :
  DWC, 13gal bucket w/7.5gal
• Distance of liquid below net pot (DWC) :
  1"
• Temperature of reservoir :
  71.4F
• TDS of nutrient solution :
  1140 (tap water = 150, effictive tds = 990, goal = 800-1000)
• Amount of air to solution
  Two large bubblers

full pic:

[DPCBassman]

Hello; not a Reply to a topic. Rather, a new question in the “What’s this…” category.

Posted these Blueberry-Fem in a few other posts.
Outdoors since June 17 - after Cicada’s were nearly gone and night temp’s were reasonable.
I’m not sure if this is Bug damage or disease. Have this exhibited on one plant primarily and in 4 locations on this plant.
I have removed (killed) about 10 hairy-slugs and a handful of Katydid’s. There are some leaves that have been chewed-on, but for 6 plants total - nothing I would consider a problem. This “black” stuff in photos and resulting leaf damage is my primary concern.
Thanks in advance!

[DPCBassman]

This pic shows better the “black” crap and affected leaves.

[Jungle]

I have no idea (but I’d guess some sort of nutrient problem). And it doesn’t bother me so much to camp on to my thread, I suspect you’d get more response with a new post.