Soil incorporation effects on nematicidal and insecticidal efficacy of Di-Syston and Temik

摘要

The effect of incorporation of Temik (aldicarb)and Di-Syston (disulfoton) insecticidal and nematicidal activity, seedling stand counts, and seed cotton yields was evaluated. No significant trends were observed between incorporated and non-incorporated plots. Plots receiving no Temik or Di-Syston tended to have lower stand counts four weeks after planting. Highest seed cotton yields in the non-incorporated plots were obtained with the 3.5 lb/A product rate of Di-Syston . Highest visual thrips damagewas observed in plots receiving no nematicide-insecticide. The numbers of nematodes varied from plot to plot. The plots which were incorporated tended to have a larger Reproductive Index (number of nematodes at sampling date/number of nematodes at planting) over the non-incorporated plots.