Observations on larval parasites, Apanteles conspersae and Sturmia picta, infesting the Far Eastern urticating moth, Euproctis flava

Abstract

Studing two larval parasites, Apanteles conspersae Fiske (Braconidae) and Sturmia picta Baranoff (Tachinidae), infesting the Far Eastern urticating moth, Euproctis flava Bremer, the following worth noting facts were observed : 1. Apanteles conspersae -1) Excepting a few cases, the parasite larva comes out from the body of (n-3)th instar larva of host (the nth instar=the final instar) and pupates on it. 2) The host alives even 17-18 days after the parasite larva escaped from it. 3) The parasitic number per host is from 1 to 11. 4) The parasitic rate is 15% and the emergent rate is 94%. 5) The prepupal and pupal stages were 7-12 days and the adults emerged during the period on May 11. to June 9. 2. Sturmia picta -1) The parasite larva comes out from the body of (n-2)th instar larva of the host and then pupates. 2) The larva of the infested host cocoons in the (n-2)th instar and dies as a result of escape of the parasite 3) The parasitic number per host is one. 4) The parasitic rate is 8% and the emergent rate is 67%. 5) The prepupal and pupal stages are 12-16 days and the adult emerged from May 30. to June 2.