Of several methods of applying oxamyl to snap beans, six weekly foliar sprays of 0.56 kg ai oxamyl/ha combined with a soil drench of 2.24 kg ai oxamyl/ha at planting was the most effective in reducing soil populations of Rotylenchulus reniformis and Quinisulcius acutus. Yield of snap beans was negatively correlated with soil populations of R. reniformis at harvest, but not with populations at planting time or at mid-season. Final populations of R. reniformis were not correlated with initial populations in 18 test plots, whereas highly significant (P = 0.01) correlations between final and initial populations existed for Q. acutus and Helicotylenchus dihystera. However, there was no correlation of yield with initial, mid-season, or final population levels of these two nematodes.
