Evaluation of Fosthiazate for the Suppression of Phytoparasitic Nematodes in Turfgrass

Abstract

Two formulations of fosthiazate (10G and 7.5 EC) were compared with fenamiphos 10G for control of phytoparasitic nematodes in fairway managed bermudagrass in two field experiments in southern Florida in 1990 and 1991. Fosthiazate was applied at 1.5 and 2.2 g a.i./m in the 1990 experiment and 0.7 and 1.5 g a.i./m in 1991. Fenamiphos was applied at 2.2 g a.i./m both years. In the 1990 study, both formulations and rates of fosthiazate were as effective as or more effective than fenamiphos 10G in reducing soil populations of Belonolaimus longicaudatus and Meloidogyne spp. and in improving turfgrass quality ratings for 56 days post-treatment. In the 1991 study, both formulations of fosthiazate at 1.5 g a.i./m were as effective as fenamiphos 10G in improving turfgrass quality ratings for 56 days post-treatment. In a laboratory pot experiment, fosthiazate 10G at 1.5 g a.i./m was compared with fenamiphos 10G at 1.1 g a.i./m for suppression of B. longicaudatus on FX-313 St. Augustinegrass. Bo