Journal of Entomological Research

SCOPUSWeb of Science
  • Year: 2011
  • Volume: 35
  • Issue: 4

Comparative study on cocoon economic characters in three different races of the silkworm, Bombyx mori (Linnaeus) infected with uzifly, Exorista sarbillans (Wiesemann)

  • Author:
  • P. Chamundeswari, M. Venkata Reddy, K. Radhakrishnaiah
  • Total Page Count: 6
  • DOI:
  • Page Number: 311 to 316

Department of Zoology, Sri Krishnadevaraya University, Anantapur-515 055, A.P., India

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

Online published on 24 January, 2012.

Abstract

The cocoon weight, length and width, shell weight, cocoon-shell ratio, filament length and fi lament weight decreased in the races PM and NB4D2 and their hybrid PM x NB4D2 silkworms after uzi infestation. The cocoons of NB4D2 were more affected than in PM race and PM x NB4D2. The floss percentage greatly increased in NBDrace, but decreased in PM and PM x NBDand was significant in PM race. The denier increased in both the races and their hybrid, which was significant in NB4D2 and PM x NB4D2 but non-significant in PM race. The uzifly infection could cause grater damage to the cocoons of NB4D2 race followed by PM race and PM x NB4D2 hybrid.