http://www.planthealth.info/diag_soygrowth.htm I would rather have my preventive treatment on at R1 but it is not too late to gain yield benefits. We had lots of 8 and 9 bushel gains here last year but we live in Septoria Brown Spot Haven. The average was 5.2 on about a hundred plots. Corn and wheat were better, near 12 bushels. I am planning to treat 100% of my crop with a replicated strips for testing. Good luck on yours. Ed |