There's a few spots of brown on the leaves, but that's not particularly noteworthy. When I've seen wind / sunburn, the edges of the burn aren't as pronounced as what I see in the small spots on those leaves. Could be a lot of things; nothing I'd worry about though. The yellowing is pretty dead-on for a poor-draining soil / too much water condition though. The plant looks too young to be losing leaves due to age, so I doubt it's that. What are they planted in? From the pictures it looks fairly dense and not much of anything in the way of perlite to keep the soil loose and draining.

Dave, Have you actually determined that you have a fungus problem? Have you determined that you COULD have a fungus problem in the future that you need to guard against? I'm not a big fan of the 'organic' no-spray method and firmly believe in 'better living through chemistry', but you should actually only use it if and when you have determined that is actually a fungus problem. Daconil and the other crap often recommended to be sprayed are poisonous you to and everything else around you. Why saturate your environment when you don;t really need to. Many of the people on GW live in environments where gardens were never intended to grow and they are fighting an uphill battle all the way. On the other hand, we have this wonderful semi-arid desert to grow in, and we have out own problems, like high winds and hail infestations :) We rarely ever have problems with the bacterial infections because it is just too dry. I have lived here all my life and the only thing me or my family has ever had to deal with were mosquitoes and miller moths. --->Rob

BUMP. Any opinions, comments ? Come on guys ! To, it is related to growing conditions: -- nutrients, light intensity, temperatures. I had exact the same condition with SOME of my pepper seedling last winter, growing under light. How many hours of light ? how close to the plants ? what is the room temperature ? Seysonn

Aphids can be particularly bad on indoor plants. They can breed uninterrupted by natural predators and there's no wind or rain to disrupt them. It only takes one female to get in. They go through stages when they are parthenogenic (can produce young without sexually reproduction) and viviparous (produce live young rather than eggs.)