Efficacy of Nematicides Against Two Destructive Nematodes; Helicotylenchus microlobus (Nematoda: Tylenchida) and Mesocriconema nebraskense (Nematoda: Criconematina) in Turfgrass

The two plant-parasitic nematodes, Helicotylenchus microlobus (spiral nematode) and Mesocriconema nebraskense (ring nematode) widely occur in Korean turfgrass fields. Control and management of these nematodes including other turfgrass nematodes is still at the basic level and therefore, a reliable control strategy is much needed to safeguard the golf courses from plant-parasitic nematodes. In this study, laboratory and field experiments were carried out to test the efficacy of four different nematicides against spiral and ring nematodes. Fluopyram showed a high control efficacy with LC50 of as low as 0.01440 ppm and LC90 of 17.241 ppm after 72 hours of treatment. There was a strong, and moderate linear correlation between the tested doses of abamectin and the corrected mortalities of H. microlobus and M. nebraskense, respectively. However, fosthiazate showed the greatest efficacy among all the tested nematicides in field conditions. This study therefore, suggests that these nematicides could be used in the control of Mesocriconema nebraskense and Helicotylenchus microlobus in turfgrass fields. KCI Citation Count: 0