Evaluation of Nematicides for Control of Root-Knot and Cyst Nematodes on a Tolerant Soybean Cultivar


  • R. Rodriguez-Kabana
  • D. G. Robertson
  • P. S. King
  • C. F. Weaver


Pest Management, Carbamate, Phosphorothioates, Organophosphates, Legumes, Plant Breeding, Quantitative Nematology, Crop Losses


A 3-year study was conducted with 'Kirby' soybean (Glycine max) in a field in south Alabama to assess the efficacy of at-plant applications of aldicarb (Temik(?) 15G), phenamiphos (Nemacur(?) 15G), 1,3-D (Telone(?) II) and EDB (Soilbrom 90(?)) for control of Heterodera glycines, Meloidogyne arenaria, and M. incognita. Aldicarb and phenamiphos were applied in a 12-cm-wide band at rates of 0, 1.1, 2.2, and 3.3 kg a.i./ha. Fumigants were applied in the row to a depth of 40 cm using 2 injectors per row; 1,3-D was applied at rates of 18.7 and 37 4 L/ha and EDB at 16.8 L/ha. EDB was used only in the first 2 years of the study. All nematicide treatments increased yields. Yield responses to applications of aldicarb and phenamiphos followed a first order kinetic model defined by Y=K-e{(A+Bx)0, where Y represents yield, x nematicide rate, and A, B, and K are constants. The 2 lowest rates of aldicarb or phenamiphos would result in profitable yield responses but the 3.3-kg rate would not be econ