21 Ara 2024 Cumartesi
Investigation of the effectiveness of entomopatogenic nematodes from Turkey and Kyrgyzstan against potato tuber moth [Phthorimaea operculella (Zeller) (Lepidoptera: Gelechiidae] under greenhouse conditions
Abstract :The potato tuber moth, Phthorimaea operculella (Zeller) (Lepidoptera: Gelechiidae) (PTM) is the most destructive pest. Entomopathogenic nematodes (EPNs) attack many different insects which at least one stage of life cycle lives in the soil. EPNs belong to families Steinernematidae and Heterorhabditidae, are inhabiting insect pathogens. This study assessed the effects of EPN species [(Steinernema feltiae 3KG, Tokat-Emir (Nematoda: Steinernematidae) and Heterorhabditis bacteriophora TOK20, 11KG isolates (Nematoda: Heterorhabditidae)] detected in Turkey and Kyrgyzstan against the larvae of P. operculella under greenhouse conditions. As a result of the experiment, counts were made at the end of 10. days at a concentration of 25 infective juveniles (IJs) cm-2, S. feltiae 3KG, S. feltiae Tokat-Emir, H. bacteriophora TOK20 and H. bacteriophora 11KG applications resulted respectively 92.08%, 74.02%, 58.49% and 29.83% deaths was determinated. In the second concentration, 50 IJs cm-2, respectively 99.71%, 82.19%, 78.79% and 56.76% deaths were detected. S. feltiae 3KG with death rate of 92.07 showed the highest effect at a concentration of 25 IJs cm-2, and H. bacteriophora 11KG showed the lowest effect with death rate of 29.83%. Again S. feltiae 3KG with death rate of 99.71% showed the highest effect at a concentration of 50 IJs cm-2, and H. bacteriophora 11KG showed the lowest effect with 56.76% larval deaths at 50 IJs cm-2 IJs concentration. This research, shows that more detail studies on the applications of EPNs with promising effects (S. feltiae 3KG isolate applications with a 99.71% mortality in larvae) under field conditions be conducted.
Biological control, entomopathogenic nematodes, Heterorhabditis bacteriophora, Steinernema feltiae, Phthorimaea operculella, Turkey, Kyrgyzstan