So it is unethical for another ag retailer to go out and offer there products to a customer of ours for less than what we are selling it to them for why?

That is the same thing you just said only you used farmers and we are an ag retailer.  I don't know any retailers that don't price products to somebody else to try and get some new business.  A few of them even offer free application of products to sell more product.  We don't, but we don't write about them on the internet and cry about lost sales.  We dig in and try find our way back in and force the other guy back out.  If you are not out putting your products out in front of people, how are you going to stay in business. 

How is that any different than farming land.  You are out putting yourself infront of your landlords to promote yourself.  If somebody else comes and does a better job than you, in the eye of the landowner, why is the unethical?

Your saying we should wait for the grower to become upset at his current place of purchase before we can go offer him our services?