Journal of Entomological Research
SCOPUSWeb of Science
  • Year: 2021
  • Volume: 45
  • Issue: 3

Spatial distribution pattern of South American tomato leaf miner, Tuta absoluta (meyrick) on open field tomato in Andhra Pradesh

  • Author:
  • P. Venkataramanaiah, S.R. Koteswara Rao, K.V. Hari Prasad, M. Reddi Sekhar1
  • Total Page Count: 4
  • Page Number: 537 to 540

1Department of Genetics and Plant Breeding, Sri Venkateswara Agricultural College, Tirupati -517 502, Andhra Pradesh, India

Department of Entomology, Sri Venkateswara Agricultural College, Tirupati -517 502, Andhra Pradesh, India

*Corresponding author's E-mail: ramanaseenu8@gmail.com

Online published on 20 October, 2021.

Abstract

Field experiment was conducted to determine the spatial distribution pattern and population density of Tuta absoluta in tomato at farmers’ field. T. absoluta was found to be a severe pest and caused damage up to 100% at field level. The various indices of distribution viz., mean, variance, variance mean ratio, David and Moore's index, Lloyd's index of mean crowding, Lloyd's index of patchiness, Lexis index and Charlier coefficient revealed that, the T. absoluta followed the aggregated or clumped distribution throughout tomato crop grown season.

Keywords

Chittoor, Kalikiri and lexis index, Lloyd's index of patchiness, South American tomato leaf miner and aggregated distribution, Tuta absoluta