Pesticide Research Journal
SCOPUSWeb of Science
  • Year: 1997
  • Volume: 9
  • Issue: 1

Effects of Neem Seed Oil on Food Consumption and Utilization by Rice Hispa

  • Author:
  • N. Deka, L.K. Hazarika
  • Total Page Count: 4
  • Page Number: 113 to 116

Department of Entomology, Assam Agricultural University, Jorhat-785 013, Assam, India

1Present mailing address: Regional Agricultural Research Station, Shillongoni, Nowgong, Assam.

2Corresponding author: Plant Protection Department, Tocklai Experimental Station, Jorhat 785 008, Assam.

Online published on 3 November, 2011.

Abstract

Neem (Azadirachta indica a. Juss) s)ed dio (NSO) acted ds a aotential antifeedant against adults of rice hispa, Dicladispa armigera (Olivier) (Coleoptera: Chrysomelide). Under laboratory conditions, a hispa adult consumed daily 1.05 ± 0.08 mg of fresh rice leaves (culture 1) which was significantly reduced to half when seedlings were treated with 6.46% NSO, the EC50 dose. The gain in adult body weight per d was significantly reduced. Similarly, adverse effects of NSO were also observed on consumption index (CI), growth rate (GR) and approximate digestibility (AD), efficiency of conversion of ingested (ECI) and efficiency of conversion of digested (ECD) food into body substance.

Keywords

Rice hispa, neem seed oil, nutrition