Influence of "Manta" on Some Economical Characters of Eri Silkworm, Samia cynthia ricini Boisdual

  • Magadum, V.B. (Department of Zoology, Karnatak Universith) ;
  • Magadum, S.B. (Department of Zoology, Karnatak Universith)
  • Published : 1991.12.01

Abstract

The "Manta"(Juvenile hormone analogue-Methoprene) was topically applied at 36.48 and 72 hrs after the fourth ecdysis to eri silkworm, Samia cynthia ricini with doses of 2.75$\mu\textrm{g}$/$m\ell$, 4/0$\mu\textrm{g}$/$m\ell$ and 8.0$\mu\textrm{g}$/$m\ell$. The eri silkworm responded to 2.75$\mu\textrm{g}$/$m\ell$ of "Manta" applied at 72 hrs after the fourth ecdysis, resulting in improvement of larval, cocoon, pupal and cocoon shell weigths.ocoon shell weigths.

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