Indian Journal of Plant Protection
  • Year: 2007
  • Volume: 35
  • Issue: 1

Phosphine Resistance in Rusty Grain Beetle, Cryptolestes ferrugineus in Andhra Pradesh, India

  • Author:
  • T Madhumathi, G V Subbaratnam$, M L N Murthy†, S Jayaraj†
  • Total Page Count: 3
  • Page Number: 29 to 31

$College of Agriculture, Rajendranagar, Hyderabad500030, Andhra Pradesh, India.

†Indian Grain Storage Management and Research Institute, Field Station, Rajendranagar, Hyderabad500030, Andhra Pradesh, India.

Department of Entomology, Agricultural College, Bapatla522101, GunturAndhra Pradesh, India.

Abstract

The populations of rusty grain beetle, Cryptolestes ferrugineus (Stephens) were collected from the store houses of Charlapalli, Machilipatnam and Samarlakota during 1995-1997 and assessed the development of resistance to phosphine. The Machilipatnam and Samarlakota strains in comparison with Charlapalli strain showed x 39.59 and x 24.54 fold resistance at LC50 level and x51.87 and x47.74 fold resistance at LC99.9 level. Machilipatnam, Samarlakota and Charlapalli strains developed x 228.25, x 210.03 and x4.40 fold resistance to phosphine, respectively when compared with (C x t) discriminating concentration x time product of 1.2 x 20 mg h/l.

Keywords

Cryptolestes ferrugineus, phosphine, resistance