Efficacy of Some Nematicidal Agents against Turfgrass Parasitic Nematodes

Hee-been Na1   Abraham Okki Mwamula2   Eun-Ji Bae3   DongWoon Lee1,2,*   

1Department of Ecological Science, Kyungpook National University, Sangju 37224, Korea
2School of Ecological Environment and Tourism, Kyungpook National University, Sangju 37224, Korea
3Forest Biomaterials Research Center, National Institute of Forest Science, Jinju 52817, Korea

Abstract

Various species of plant parasitic nematodes are known to damage turfgrass. However, there are no nematicides registered for the control of turfgrass nematodes in Korea. Therefore, the present study was conducted to investigate the efficacy of some nematicidal active ingredients ([nematicides; abamectin, fluazaindolizine, fluopyram, fosthiazate, imicyafos], microbial nematicide [Burkholderia rinojensis], and nematicidal compound [hydrogen peroxide]) on turfgrass nematodes, for the subsequent selection and development of effective nematicidal agents. As a result of the laboratory nematicidal activity test, high efficacy of hydrogen peroxide and fluopyram against mixed nematode populations of 5 species (Paratrichodorus minor, Helicotylenchus microlobus, Paralongidorus koreanensis, Mesocriconema curvatum, and Tylenchorhynchus thermophilus) isolated from the Seogyeong Tani and Sky72 golf course soil samples were observed. Treatment of the nematodes with the two chemical compounds exhibited high mortality rate of more than 80% even in the first 3 hours after treatment, depending on the chemical concentration. In field treatments on golf course tees (Kentucky bluegrass), imicyafos and fluopyram were more effective until the 60th day of treatment. Therefore, it is considered that these two nematicides can be practically used to control nematodes in golf courses.

Figures & Tables

Fig. 1. Control efficacy of some nematicidal agents against turfgrass parasitic nematodes isolated from Kentucky blue grass in tee of Tani country club in multi-well plate (first trial). A: 24 hours after treatment; B: 48 hours after treatment; C: 72 hours after treatment. Nematodes were socked with aquatic suspension of nematicidal materials. Bars on the graph represent means of 4 replicates±SE; bars with the same lowercase letters are not significantly different according to the Tukey’s studentized range (HSD) test (<0.05). Number in treatment is amount of applied nematicides’ active ingredient (ppm).