How much area does one entire container cover when diluted?

This will cover a minimum of an acre when diluted. If you are using commercial farming type misting sprayers, it will cover about 5 acres. Thanks!

How long does one application last? Description and Features and Details have 2 different descriptions.

We recommend spraying the solution once a month , more often if you get a lot of heavy rain. Also do not spray within 24 hours of heavy rain. Hope this helps. Thank you!

Is this organic? What other chemicals are in it?

According to the container it is 99.3% Garlic Juice, 0.5% Citric Acid (from corn), and 0.2% Potassium Sorbate - So I'd say it is organic. Haven't had a chance to use it yet, but looking forward to using it to spray yard/trees to deter insects.

How many gallons of spray will one gallon of Garlic Barrier make? I'm using in on a partially wooded acre.

If your fighting a preexisting infestation, use the 50:1 ratio, especially for red wasps. This will give you 50 gallons. If you are just using it as a barrier, the 100:1 ratio should work fine, giving you 100 gallons.