Evaluating Replant Options in Peanut at Multiple Planting Dates and Multiple Durations Between Initial Planting and Replanting.

Plant stand establishment is a major consideration when making planting and early season management decisions in peanut (Arachis hypogaea L.).  The unpredictable and often extreme weather and the ubiquity of pathogens in the southeastern United States often contribute to poor emergence and resultant plant stands below optimum.  If plant stands are low enough, peanut may benefit form replanting via either supplementation of the original stand or by destroying the original plant stand and completely replanting.  Planting date has also shown to be a major factor determining yield potential in peanut.  A grower must consider original and potential plant stand from replanting, as well as yield potential of the original planting date when compared to potential at the replanting date.  Field trials were completed in Tifton, GA and Attapulgus, GA in 2012 and 2013 to determine the effects of replanting a below-optimum stand on pod yield, market grade, and disease incidence at three time durations (early, middle, late) following two initial planting dates (early, late).  Yield from replanting was greater than yield of the non-replanted, reduced plant stand treatment in two of eight site-year X initial planting date interactions.  When replanting was beneficial, it was always at either the early or middle replanting date.  In general, replanting via supplemental addition of seed yielded greater than destroying the initial stand and completely replanting across all planting date and duration combinations.  At the early initial planting date, market grade was lowest at the latest replant date.  A grower considering replanting should make the decision as quickly after initial planting as possible in order to achieve the maximum potential yield enhancement.