What are your temperatures? Basil does best w/consistent warmth -- 55F or above, day & night.

Hmm.. it's been a bit chilly at night here so I bet that maybe it. Last night it was 55 degrees, tonight it will be 52. That's good to know as we will start warming up more soon.

Thank you!

Your basil looks pretty bushy, so I'd say it's getting enough light, but it is very yellow, which indicates not enough nitrogen. You need to give those plants some fertilizer.

Composted manure does not provide sufficient nitrogen for most crops. Also, the nitrogen that is in composted manure is not immediately available to plants. It is broken down by microorganisms into a form usable by plants, but it takes a while. I don't know for sure about Cow Wow, but it looks like it is just liquid manure.

Manure is great for soil structures and provides organics, but it is not a complete fertilizer.

Thanks Potterhead2, I'm trying to stick to natural fertilizers so any suggestions more nitrogen? Coffee Grounds?

To OP,
I don't know the characteristics of the Sting Bug. If it flies, then tulle can help. There are clear nylon,tulles that doe not block the light at all. Also, there are differenly meshed tulles. Originally I got interested in it, to block tics/beetles/flies that attack eggplant leaves at younger stage. One more use of tulle can be to prevent cross pollination (not applicable to tomato though).

Coffee grounds are a pretty good nitrogen source. They are also acidic, so be careful if your soil tends toward acid.

Blood meal and bat guano are very high in nitrogen.

Cottonseed meal, soybean meal and fish emulsion are fertilizers that are fairly high in nitrogen and also have a good amount of phosphorus and potassium.

Check out the link below for more info on natural fertilizers.

Here is a link that might be useful: Fertilizing Your Organic Garden