Control of Meloidogyne arenaria in Peanut with 1,3-D: Relative Efficacy and Application Depth

Abstract

A 2-year field study was conducted to compare the efficacy of preplant applications of 1,3-D (Telone(?) II) with that of ethylene dibromide (EDB) and aldicarb (Temik(?) 15G) for control of Meloidogyne arenaria and to increase yield of 'Florunner' peanut (Arachis hypogaea). 1,3-D was less effective than EDB for increasing yields; the advantage of EDB over 1,3-D was especially pronounced when both fumigants were applied at rates below 35 L/ha. In the first year of the study, at-plant applications of aldicarb at 1.1 and 2.2 kg a.i./ha were not as effective as treatments with 1,3-D at rates higher than 37 4 L/ha or those with EDB in the range of 8.4-33.7 L/ha for reducing M. arenaria populations in soil or increasing yields; however, control of M. arenaria and yield response in the second year (a dry season) was as good with aldicarb (2.2 kg a.i./ha) as with 1,3-D (18.7-93.5 L/ha) or with EDB (16.8 and 33.7 L/ha). The efficacy of 1,3-D for controlling M. arenaria and increasing yield was