Insecticidal activities of diketopiperazines of Nomuraea rileyi entomopathogenic fungus

DOI: 10.22161/ijeab/2.4.18

Keyword: antifeedant, entomopathogenic fungi, insect pests, oviposition deterrence, repellency.

Abstract: Entomopathogenic fungi are fungal organisms extensively used in various parts of the world as biopesticides against insect pests that cause important economic damage. Various secondary metabolites produced by these fungi have many potential biological activities. The present study was undertaken to evaluate the insecticidal activity of extracts and pure compounds from Nomuraea rileyi (Farlow) Samson entomopathogenic fungi against Spodoptera frugiperda Smith (Lepidoptera), Ceratitis capitata Wiedemann (Diptera) and Tribolium castaneum Herbst (Coleoptera), three insect pests that generate serious economic losses in the northwest of Argentina. Diketopiperazines were extracted from the culture free supernatant of the media with ethyl acetate. Antifeedant properties were detected in all extracts under dietary choice conditions (300 ug/ g of diet). The maximum antifeedant activity was noted in cycles (Pro-Val) (86.02) and cycle (Pro-Phe) (73.47), while the rest of the extracts and metabolites exhibited varying degrees of moderate or less toxic effects. The maximum oviposition deterrence against C. capitata (55.86%) was recorded with cycle (Pro-Phe) at a 50 µm/cm2 dose. Culture medium extracts supplemented with insect remains and all pure compounds showed repellent action against T. castaneum. The main repellency was observed in phenylacetic acid and cycle (Pro-Val) with RI values of 42 and 41% respectively. The present study would suggest the possible utilization of entomopathogenic fungal metabolites as an effective agent for controlling insect pests that cause important economic losses.

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Karenina Marcinkevicius, Analia Salvatore, Alicia Bardon, Elena Cartagena,Mario Arena, Nancy Vera et al."Insecticidal activities of diketopiperazines of Nomuraea rileyi entomopathogenic fungus". International Journal of Environment Agriculture and Biotechnology(ISSN: 2456-1878),vol 2, no. 4, 2017, pp.1586-1596 AI Publications doi:10.22161/ijeab/2.4.18

Karenina Marcinkevicius, Analia Salvatore, Alicia Bardon, Elena Cartagena,Mario Arena, Nancy Vera, P.(2017).Insecticidal activities of diketopiperazines of Nomuraea rileyi entomopathogenic fungus. International Journal of Environment Agriculture and Biotechnology(ISSN: 2456-1878).2(4), 1586-1596.10.22161/ijeab/2.4.18

Karenina Marcinkevicius, Analia Salvatore, Alicia Bardon, Elena Cartagena,Mario Arena, Nancy Vera, P.(2017).Insecticidal activities of diketopiperazines of Nomuraea rileyi entomopathogenic fungus. International Journal of Environment Agriculture and Biotechnology(ISSN: 2456-1878).2(4), pp.1586-1596.

Karenina Marcinkevicius, Analia Salvatore, Alicia Bardon, Elena Cartagena,Mario Arena, Nancy Vera. 2017."Insecticidal activities of diketopiperazines of Nomuraea rileyi entomopathogenic fungus". International Journal of Environment Agriculture and Biotechnology(ISSN: 2456-1878).2(4):1586-1596.Doi:10.22161/ijeab/2.4.18

Karenina Marcinkevicius, Analia Salvatore, Alicia Bardon, Elena Cartagena,Mario Arena, Nancy Vera."Insecticidal activities of diketopiperazines of Nomuraea rileyi entomopathogenic fungus", International Journal of Environment Agriculture and Biotechnology,vol.2,no. 4, pp.1586-1596,2017.

@article { kareninamarcinkevicius2017insecticidal,
title={Insecticidal activities of diketopiperazines of Nomuraea rileyi entomopathogenic fungus},
author={Karenina Marcinkevicius, Analia Salvatore, Alicia Bardon, Elena Cartagena,Mario Arena, Nancy Vera , R},
journal={International Journal of Environment Agriculture and Biotechnology},
volume={2},
year= {2017} ,
}