Growth Inhibitory Effect of Medicinal Plant Extracts on Insect Pests and Pathogenic Fungi

Authors

  • Jitendra Singh ICAR-National Research Centre for Integrated Pest Management, New Delhi-110012, India.
  • Bharat Bhushan "Scientist (Bio-Chemistry), Crop Processing Division, ICAR-CIPHET, Abohar, Punjab"
  • Archana Singh Department of Zoology, University of Delhi, Delhi-110007, India.
  • Dileep Kumar Singh Department of Zoology, University of Delhi, Delhi-110007, India.
  • Anoop Kumar ICAR-National Research Centre for Integrated Pest Management, New Delhi-110012, India.
  • Surender Kumar Singh ICAR-National Research Centre for Integrated Pest Management, New Delhi-110012, India.

Keywords:

Egg, Larvae, P. brassicae, H. armigera, Inhibition zone, Leaf extracts

Abstract

Leaf extracts of eight medicinal plants were examined for insecticidal and fungicidal activities against
two insect pests and five pathogenic fungi. Two polar solvents were used separately for the extraction.
Extracts in solvent-I indicated substantial eggs and larval mortalities in either case of the insects. Among
the treatments, Solanum xanthocarpum indicated highest egg (52-61%) and larval (38-56%) mortalities of
Pieris brassicae and Helicoverpa armigera insects. Moreover, moderate egg (18-47%) and larval (18-50%)
mortalities were found in Ocimum sanctum, Calotropis procera, Euphorbia hirta, and Plectranthus barbatus
treatments. Comparatively less efficacies were observed in treatments of solvent-II extracts. Antifungal
activities depicted in terms of growth inhibition zones, such zones were found in all the treatments with
variable sizes. S. xanthocarpum treatment exhibited highest fungicidal activities against all the five fungi
with growth inhibition zones from 13.7 to 18.3 mm and 11.0 to 13.7 mm diameter respectively, in solvent-I
and solvent-II extracts.

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Published

2018-09-07