Effect of Entomopathogenic Fungi on Spodoptera littoralis (Boisd.) and Agrotis ipsilon (Hufn.)

摘要

Virulence of commercially formulated products of the entomopathogenic fungi, Bioranza (Metarhizium anisopliae) and Biovar (Beauveria bassiana) to Spodoptera littoralis and Agrotis ipsilon was evaluated under laboratory conditions. The LC_(50) of Bioranza to S. littoralis was found to be 1.63 times greater than that of Biovar. On the other hand, the LC_(50) of Bioranza to A. ipsilon was 1.98 times greater than that of Biovar. The LT_(50) values indicated that Biovar was, however, faster than Bioranza in inducing mortality. The use of either Bioranza or Biovar, at the recommended concentration of 2g/l, resulted in considerable mortality of both S. littoralis and A. ipsilon.