Indian Journal of Entomology
Open Access
SCOPUSWeb of Science
  • Year: 2020
  • Volume: 82
  • Issue: 4

Diversity of coccinellids in rabi tomato and effect of dimethoate

  • Author:
  • Madhu E Hirur*,3, G Anitha3, Anitha D Kumari1,3, Uma G Devi2,3
  • Total Page Count: 3
  • Published Online: Feb 5, 2021
  • Page Number: 781 to 783

1department of Plant Pathology, College of Agriculture, Professor Jayashankar Telengana State Agricultural University, Rajendranagar, Hyderabad. 500030

2Vegetable Research Station, Sri Konda Laxman Telangana State Horticultural University, Rajendranagar, Hyderabad500030

3Department of Entomology, College of Agriculture, Professor Jayashankar Telengana State Agricultural University, Rajendranagar, Hyderabad. 500030;

*Email: madhuerannah6578@gmail.com(corresponding author)

Abstract

Coccinellids play an important role as predators in regulating pests in tomato ecosystem. The present study is focused on the biodiversity and abundance of coccinellids in rabi tomato under sprayed and unsprayed conditions during rabi 2018-19 and on the effect of dimethoate. Three species of coccinellids viz., Scymnus sp., Cheilomenes sp. and Illeis sp. were observed. The Margelef’s index of diversity, Pielou’s evenness index and Shannon- Wiener diversity index for these were 0.45, 0.89 and 0.98, respectively in sprayed block, while these were 0.39, 0.92 and 1.01, respectively in the unsprayed block. These revealed that the diversity parameters in the sprayed and unsprayed tomato blocks were on par with each other.

Keywords

Coccinellids, Tomato, Margelef’s index, Pielou’s evenness index, Shannon-Wiener diversity index, Scymnus sp., Cheilomenes sp., Illeis sp., Dimethoate, Biosafety