We plant 22 inch rows. White mold is our #1 problem.
My spreadsheet shows 72 bushel beans are pretty darn close to 200 bushel corn, and a whole lot less work. Plus then I have some bean ground to get corn on early next year. The tough part is there's a good chance my beans could only make 45 and an equal chance the corn could go 240. Should probably go all corn but I've had it drilled into me that that's being too greedy and sensible producers don't do that! Ha!
NDSU I'm still an old die hard on 30" rows,I raise a lot of edibles,but most have switched to 22" around here and in any kind of a wetter year the white mold kills them even with 2 sprays topsin,which what I've still see is your best bet/longer lasting control on mold and if its stays wet your still screwed.... I'm in a white mold hot spot and have been for years,even on soybeans I always plant for IDC first upright narrow plant profile 2nd
82 gave some excellent advice to those of you with white mold problems.
Apply Corbra at 8-12.5 oz/acre and burn them beans. They may look like crap but it doesn't affect yield negatively. Been burning my non-gmos for years to no ill-effect. Drilled on 7.5" spacing and never had an issue with white mold. Fungicide doesn't do any good against white mold. The reason cobra/phoenix works is that by burning the soybean, it causes the plant to create antibodies (proteins) which help ward off mold. White mold orginates in the soil so if you have had it in the past, you will definately have it in the future.