Susceptibility of the fall armyworm, Spodoptera frugiperda (J.E. Smith, 1797) (Lepidoptera: Noctuidae), to four species of entomopathogenic nematodes (Steinernematidae and Heterorhabditidae) from Mizoram, North-Eastern India
نویسندگان
چکیده
Abstract Background Outbreak of the fall armyworm Spodoptera frugiperda (J.E. Smith, 1797) (Lepidoptera: Noctuidae) occurred in Mizoram, North-Eastern India. The infestation spread entire state covering a total area around 2840 hectares maize cultivated land. Entomopathogenic nematodes (EPNs) represent potential candidates for biological control S. . In study, susceptibility pest against 4 locally isolated EPN species Heterorhabditis indica , H. baujardi Steinernema sangi and surkhetense was evaluated. Results results indicated that all showed high rate larvicidal pupicidal activities pest. Mortality between 43.75–100.00 25.00–100.00% 3rd 5th larval instars, respectively (at concentrations 10 – 800 IJs/larva), 37.50–68.75% mortality pupae 200–1600 IJs /pupa) were found after exposure to species. significant variations with life stages host insect, nematode incubation time. Based on median lethal concentration (LC 50 ), most pathogenic species, followed by LC values at 72 h post-incubation 20.26 62.07 IJs/larva respectively, 913.34 IJs/pupa. penetration assay had highest into hosts, 27.24, 21.30 20.00% 3rd, instars pupae, respectively. Furthermore, isolates capable successful multiplication inside cadaver differences Among isolates, rates, 17,692.25 ± 2103.59, 8345.63 785.34 79,146.38 5943.73 per instar larva, larva pupa, Conclusions study revealed EPNs potency thereby having be developed as agent Moreover, could potentially serve alternatives chemical insecticides further incorporated Integrated Pest Management (IPM).
منابع مشابه
BIOLOGICAL CONTROL Application Technology for the Entomopathogenic Nematodes Heterorhabditis indica and Steinernema sp. (Rhabditida: Heterorhabditidae and Steinernematidae) to Control Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae) in Corn1
The effects of different application technologies were evaluated on the concentration, viability, and effi ciency of infective juveniles of the nematodes Heterorhabditis indica Poinar, Karunakar & David and Steinernema sp. (IBCB-n6) to control Spodoptera frugiperda Smith on corn plants. Two hundred and eighty infective juveniles of Steinernema sp. were required to kill 100% third-instar fall ar...
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ژورنال
عنوان ژورنال: Egyptian Journal of Biological Pest Control
سال: 2021
ISSN: ['2536-9342', '1110-1768']
DOI: https://doi.org/10.1186/s41938-021-00453-y