Peanut Response to 2,4-DB plus Crop Oil at Various Application Timings

Abstract

2,4-DB is an effective post emergence herbicide for broadleaf weed control in peanut, but concerns over crop safety and its effect on yield and quality still exist.  Field experiments were conducted to determine the effect of the dimethylamine salt of 2,4-DB with or without crop oil concentrate at various application timings on yield of runner peanut.  2,4-DB at 0.4 lb ae/A was applied 30, 45, 60, 90, and 120 days after planting (DAP).  Sequential 2,4-DB timings included 30 DAP followed by (fb) 60, 90, or 120 DAP; 60 DAP fb 90 or 120 DAP; and 90 DAP fb 120 DAP.  Peanut yield and quality were not affected by 2,4-DB regardless of the addition of crop oil concentrate or application timings.