Comparison of Methyl Bromide and Other Nematicides for Control of Nematodes in Peanut

R. Rodriguez-Kabana, D. G. Robertson, P. S. King

Abstract


The efficacy of methyl bromide for control ofMeloidogyne arenaria and to increase yields of 'Florunner' peanut (Arachis hypogaea) was studied in a field at the Wiregrass Substation near Headland, Alabama. Methyl bromide was applied in the row at a depth of 35 cm using a subsoiler-bedder 2 weeks before planting at rates of 0, 34, 50, 67, 101, and 118 kg a.i./ha. Methyl bromide treatments of 67 kg a.i./ha or higher resulted in significant (P = 0.05) yield increases similar to those obtained in the same experiment with at-plant applications of aldicarb (2.2 kg a.i./ha), EDB (1.55 ml a.i./m row), or 1,3-D (5.10 ml a.i./m row). The relation between yield (Y) and methyl bromide rate (x) was described (R² = 0.97**) by the exponential function: Y = 2,302.963e[supb], where b = (- 1.901 - ln x)²/169.482. M. arenaria juvenile populations in soil in mid-August were too low to permit establishment of a relation between application rate of methyl bromide and size of the population. Key words: aldicarb, Arachis hypogaea, chemical control, ethylene dibromide, methyl bromide, peanut, pest management.

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