Without weighing into the seed coating pesticide debate, I simply don't know the answer there, I just posted a link on page three of this thread of a farmer who is farming on an extremely large scale, 2000 acres in production, multiple cash crops and grasses and vegetables, and free range beef, pork, chicken. With no chemical fertilizer, pesticide, fungicide and only a small amount of roundup... Took him 5 years to get off the pesticide, 15 the fertilizer, but he's doing it! Of course billion dollar agri chemical makers want you spraying and spreading as much as possible, it's simple business.
He's beggining to get well known... If you spend the 1 hour and 15 minutes watching it, you'll get it... He is not an anti and makes more money per acre than conventional farmers. Again I'm sure it's not that easy to do, but it is being done... I realize talk is cheap, but here it is;
http://www.youtube.com/watch?v=9yPjoh9YJMk