Optimizing Dry Bean Desiccants
April 15, 2003
Dept. of Crop and Weed Sciences
North Dakota State University
In 2001, field research was conducted to evaluate plant leaf and vine desiccation on navy and pinto beans. Twelve
registered and experimental herbicides were applied at recommended rates. Untreated checks were included in all studies. Navy bean sites were located at Hatton and Prosper, ND. At Prosper, glufosinate, endothall, lactofen, ET-751, Caprilic Acid-2, and S-3100 caused more than 88% leaf desiccation 7 DAA. Diquat, paraquat, glyphosate, carfentrazone, flumioxazin, and Caprilic Acid-1 caused less than 88% leaf desiccation. Leaf desiccation in the untreated check was 66%. At Hatton, leaf desiccation was about 10 to 15% less for all treatments. The weather after treatment application was cold, wet, and cloudy, consequently treatments took until 14 DAA to reach results similar to those in Prosper 7 DAA. Endothall, lactofen, ET-751, Caprilic Acid-2, and S-3100 gave greater than 86% vine desiccation in Prosper 7 DAA. Vine desiccation in the untreated check was 54%. None of the treatments in Hatton provided better than 80% vine desiccation. Seed moisture was taken 7 DAA. At Prosper, seed moisture ranged from 13 to 15% in treated plots and 13.4% in the untreated check. Seed moisture at Hatton ranged from 22 to 33% moisture in treated plots and 34% in the untreated check. Pinto beans were planted at Prosper and Erie, ND. At Propser, glufosinate, enothall, lactofen, flumioxazin, and S-3100 caused more than 87% leaf desiccation 7 DAA. Leaf desiccation in the untreated check was 58%. All treatments caused more than 88% leaf desiccation at Erie due to the advanced stage of crop maturity caused by bacterial blight. Leaf desiccation in the untreated check was 75%. In Prosper, endothall, lactofen, flumioxazin, and S-3100 caused more than 84% vine desiccation 7 DAA. Vine desiccation in the untreated check was 51%. All treatments in Erie had more than 88% vine desiccation. At Prosper and Erie seed moisture ranged 14 to 18% in the treated plots. Seed moisture in the untreated checks in Proper and Erie was 22 and 15%, respectively.