Indian Journal of Entomology
Open Access
SCOPUSWeb of Science
  • Year: 2024
  • Volume: 86
  • Issue: 3

Impact of essential oils on biological traits of Trichogramma chilonis Ishii

  • Author:
  • M Sowmya1,2, O S Bindhu2, K Subaharan1,*, T M Vinay Kumar1,2, Y M Soundarya1, R Varshney1, O Navik1, U Amala1, S N Sushil1
  • Total Page Count: 4
  • Published Online: Mar 1, 2025
  • Page Number: 816 to 819

1ICAR-National Bureau of Agricultural Insect Resources, H A Farm Post, Bellary Road, Hebbal, Bengaluru, 560024, Karnataka, India

2Department of Chemistry and Biochemistry, Jain (Deemed-to-be University), Bengaluru, 560027, Karnataka, India

*Email: kesavan.subaharan@icar.gov.in (corresponding author): ORCID ID 0000-0003-1828-6644

Online published on 1 April, 2025.

Abstract

Trichogramma chilonis Ishii (Hymenoptera: Trichogrammatidae) reared on factious host rice moth Corcyra cephalonica (Stainton) (Lepidoptera: Pyralidae) is an egg parasitoid on lepidopteran pests. The essential oils, viz., ajowan Trachyspermum ammi, betel Piper betle, and sweet basil Ocimum basilicum and neem oil were assessed for their toxicity and biological traits like parasitism and emergence on T. chilonis. Among the EOs tested, T. ammi caused highest toxicity to T. chilonis (LC50 0.316 ppm) followed by P. betle (LC50 0.567 ppm). At sublethal dose, they had an impact on parasitism and adult emergence of T. chilonis. Whilst O. basilicum and neem oil were relatively safe at sublethal doses to T. chilonis. This study highlights the need to maintain a waiting period before the release of T. chilonis in EOs treated substrates.

Keywords

Corcyra cephalonica, Essential oils, IPM, Ocimum basilicum, Parasitoids, Piper betle, Selectivity, Trachyspermum ammi, Trichogramma chilonis, Trichogrammatidae