Sick Tomatoes

[jlacosta]

My potting mix is 50% coco coir, 20% sterilized rice hull, 10% vermiculite and 30% compost. I water every 2-3 days and use slow osmocote slow release nutes.
 
These tomato plants have been looking like these from the start. I do notice some white flies but I do try to get them off every night when I get the chance to spray water on them.
 
Some photos
 

 

 

 
My Tiny Tim tomato also get got it.
 

 

 

 
Not sure if these are fungi/blight as they are only on the leaves. Overwatering perhaps? I do water twice a week to ensure the container gets pretty dry before I give them a good watering.
 
Any advice will be appreciated.

 

[Hophead]

Could be a nutrient deficiency check out this link - http://www.farmspeak.com/nutrient-deficiency.html
 
Coconut fiber absorbs large amounts of calcium and if not charged with a calcium supplement it can absorb it from the plants resulting in nutrient deficiencies.
 
Shot in the dark im sure someone else will post a better answer.

 

[jlacosta]

Thanks for the link HH. Could be a few things misisng in the mix to supplement the lack of nutes being absorbed by coco.
 
Would it be possible that the white substance under the leaves be molds being able to attack the plants while their immunity is low or it could be something else?

 

[Penny]

Hopheads right about the coconut fibre, to me it looks like early blight.

 

[wildseed57]

It could be early blight as stated before, but some of the damage under the leaves looks like spider mites,  I would use a anti fungal spray along with some insecticide soap to kill the mites I would add a bit of epsom salts to the mix.  Also you can try spraying some liquid copper spray or even some liquid sulfur and calcium mixed with water.

 

[Penny]

Keep us posted on how you make out with them....good luck.

 

[catherinew]

It doesn't look like early blight as I don't see concentric circles on the leaves.  It may be a nutrient deficiency.  Check on which fertilizers you're using - since you're using a slow release - the plant may need nutes ASAP.
 
The white flies may also be adding to the plant's demise.  Water is just a deterrent to the white flies and not a cure.
 
http://www.almanac.com/content/whiteflies

 

[Nick08*]

Yikes, those leaves look rough. To me, it also looks more like a deficiency than a disease. Agree with the calcium statement, but also could be magnesium. How long have these looked like this?
 
Secondary fungal infections are extremely common, it just gives them a chance to take hold while the plant is weak, when normally they wouldnt have the chance. Is the stuff under the leaves "soft" like a mold/mildew? Or is it harder, something like edema?
 
http://www.extension.org/pages/9864/magnesium-mg#.UwFx7UtX_Ww
 
http://negreenhouseupdate.info/photos/tomato-plant-edema