Ben Von Kanel¹, Angus Catchot¹, Jeff Gore², D. R. Cook², B. R. Leonard³, S. D. Stewart⁴, G. Lorenz⁵, Scott Akin⁶, Glenn Studebaker⁷ and K. V. Tindall⁸, (1)Mississippi State University, Mississippi State, MS, (2)Mississippi State University, Stoneville, MS, (3)LSU AgCenter, Winnsboro, LA, (4)Jackson, TN, (5)University of Arkansas, Keiser, AR, (6)FMC Corporation, Monticello, AR, (7)University of Arkansas Cooperative Extension Service, Lonoke, AR, (8)Univ. of Missouri, Portageville, MO