Hi jj5245, Nice setup! :-) Please provide a bit more info:
- What is the expiration date on your package of Actinovate?
- Please provide water source and water filtration details (if any).
- Did you grow these seedlings from seed or were they purchased as seedlings from an external source? (please provide details).
- What is your nutrient solution temperature?
- What is your ambient air temperature around the TG?
- What is the relative humidity around the TG?
- What are your nutrient pump timer On/Off settings?
BTW/FYI: Your photo of Cauliflower appears to be of the seedling's cotyledons (not the true leaves).
First of all, thank you for responding and offering assistance. The array of bewildering information and products available online makes solutions to some gardening problems very difficult for the novice.
- The Actinovate expiration date is 07/24/17. I know its normal shelf life is a year and its normally stored in a refrigerator until use. It is applied with room temperature chlorine free spring water.
- The seedlings have been grown from seeds in seedling tray with a heating mat and light in spring water with a light nutrient solution. water was changed or consumed by seedlings about every 2 to 3 days.
- Nutrient solution temperature is 69 degrees
- Ambient air temperature around the TG is 70 degrees
- Relative humidity around the TG is 49 percent.
- Nutrient pump timer On/Off settings are 15 minutes on and 45 minutes off.
Lastly, yesterday after some more research, anticipating that waiting might hurt the plants further, i applied neem oil at a rate of 4 tablespoons per gallon in a spray throughout the tower. I assumed it would be the least harmful solution even if it were wrong. I also placed a 10" fan on a bench about 12" high aiming up to the tower on one side. It is providing a larger airflow although mostly only to one side, but more substantial. It is replacing the two small 4" usb fans.
Thank you again.
Update - Monday june 19 , 7am. Neen oil had little to no effect, plant disease is still spreading.Cucumber leaves and tomato plants are affected as well.