Evaluation of two native entomopathogenic nematodes against Odontotermes obesus (Rambur) (Isoptera: Termitidae) and Agrotis ipsilon (Hufnagel) (Lepidoptera: Noctuidae)

Egyptian Journal of Biological Pest Control

Nang Sena Manpoong¹  K. Sindhura Bhairavi¹  Sudhansu Bhagawati¹  Partha Pratim Gyanudoy Das¹  Elangbam Bidyarani Devi¹  Badal Bhattacharyya¹  Gitanjali Devi² 

[1] Department of Entomology, Assam Agricultural University, 785013, Jorhat, Assam, India;Department of Nematology, Assam Agricultural University, 785013, Jorhat, Assam, India;

关键词: Biological control;    Entomopathogenic nematodes;    Heterorhabditis bacteriophora;    Steinernema aciari;    Odontotermes obesus;    Agrotis ipsilon;   

DOI  :  10.1186/s41938-021-00457-8

来源: Springer

【 摘 要 】

BackgroundEntomopathogenic nematodes (EPNs) are one of the widely studied biological control agents. The present study was conducted to evaluate the efficacy of two EPNs species, Heterorhabditis bacteriophora (Poinar) (Rhabditida: Heterorhabditidae) and Steinernema aciari (Qui, Yan, Zhou, Nguyen and Pang) (Rhabditida: Steinernematidae), isolated locally from soils of Majuli river island, Assam, India against two important subterrenean pests; Odontotermes obesus (Rambur) (Isoptera: Termitidae) and Agrotis ipsilon (Hufnagel) (Lepidoptera: Noctuidae) under laboratory conditions.ResultsIn case of O. obesus, mortality percent was recorded by H. bacteriophora after 72 h. at 300 IJs/termite and by S. aciari at 250 and 300 IJs/termite after 96 h. The lowest LD50 and LT50 values obtained for H. bacteriophora were 13.054 IJs/termite and 26.639 h., respectively, while those of S. aciari were 42.040 IJs/termite and 31.761 h., respectively. With respect to A. ipsilon, H. bacteriophora registered a highest mortality rate at 300 IJs/larvae after 144 h. S. aciari showed 100 percent mortality at 300 IJs/larva after 168 h. The lowest values of LD50 and LT50 for H. bacteriophora were 35.711 IJs/larva and 83.050 h., respectively. The lowest values of LD50 and LT50 for S. aciari were 71.192 IJs/larvae and 97.921 h., respectively. Overall, H. bacteriophora displayed more virulence toward O. obesus and A. ipsilon than S. aciari.ConclusionBoth native EPNs were found effective against O. obesus and A. ipsilon. However, H. bacteriophora was more virulent toward O. obesus and A. ipsilon than S. aciari under the laboratory conditions.

【 授权许可】

CC BY