Hi @beginner2d , it would really help us figure out what’s wrong if you fill out a support ticket. 
Support Ticket
Please post pics and fill this out:
What is the strain and type(unknown bag seed, strain name, regular seeds, feminized seeds, auto-flower, etc)?
Indoor or Outdoor? If outdoor, planted in ground or in a container?
Size of pots ?
Size of space (max height and area, length/width)?
Soil or Hydro? Type of Medium used? Brand of soil? System type?
pH? Of the soil or medium (root zone/reservoir/run-off) and of the water and/or nutrient mix that is fed to the plant?
Type and strength of nutrients used? NPK? EC/TDS/PPM levels? Of what you feed it as well as what is in the water by itself and in the soil/medium (run-off), or reservoir.
Temperature? Day vs. night temp or highest andlowest temps? Root zone temps?
Humidity %? Day vs. night
Light system/watts/lumens/FLUX/PAR?
Ventilation system? Size? CFM? CO2? AC, Humidifier, De-humidifier?
Number “weeks/days” from into Season, Vegetative Growth or Bloom/flowering?
Add anything else you feel would help us give you a most informed answer. Feel free to elaborate, but try to be brief and to the point. Short and to the point questions and/or facts will help us help you.
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I am with @raustin
Lets get this info filled out so we can get ya all dialed in
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Indoor. Autos. Blueberry. 4-5 gal pots. Soil. Premixed, don’t know ratio. Runoff was 6.4/816 first and after flush 6.6/400 amnesia auto are almost same yellowing and have Runoff 7.6/500?? After flush AH auto 7.0/430ppm. I can’t understand how same symptoms but pH is not same. General hydroponics organic veg/bloom/budbooster.16°C/26°C Air. Root zone 16-25. RH 25-60. Cfm vent 10cm in and out + 2x100mm passive vents. 600x3 led +300 led
Everywhere lower and upper leaves. Can’t be light burn. 3rd week flowering.
I must learn something but 3rd w flowering and allmost overnight this, dark time is humid but direct airflow
What can happening? 3rd w flowering, very humid nighttime. Biobizz all components half power, light mix schedule. Last time half dosage is causing little nute burn that’s because I don’t add this week more. But can vegan Bio cause nute burns after all. But that’s what I have lower leaves.
Or defiances?
I think you have a nitrogen deficiency. You need to feed at full strength.
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My second batch of ArmyofAutos and they have white spectacles on them. Today I look them (leaves) closely at microscope X60 and dont see any aphids, but what I see are white/clear eggs underside leaves. They come when weather goes ~60F temps, I’ve read aphids like cooler weather. Weather are very humid too, 70 day, 95night.
Two residents underside leaf, one green with wings and other some kind white larvae or something. Idk.
I’ve been dealing with those green bugs all year have no idea what they are but mine were on stems didn’t seem to do any damage to the plants except leave a white spit like substance
Yes. I have ee, 100 different bugs there 
Wonder if grass hoppers do that. I have many of them there.
I found that a product called de helps though its a powder comes in food grade IdK about using it in flower though