Adult Emergence in Biosteres (Opius) Longicaudatus and Anastrepha Suspensa in Relation to the Temperature and Moisture Concentration of the Pupation Medium

Authors

  • T. R. Ashley
  • P. D. Greany
  • D. L. Chambers

Abstract

The effects of temperature and moisture concentration (MC) of the pupation medium were studied in relation to the developmental success of the parasitoid Biosteres (Opius) longicaudatus Ashmead and its host Anastrepha suspensa (Loew), the Caribean fruit fly. Temperatures ranged from 22-32@*C in 2@*C increments; pupation media of 25, 50, and 75% MC (by weight) were tested. The developmental time for B. longicaudatus within the puparium of A. suspensa ranged from 10.6 to 24.4 days over the temperature range selected, but was not affected by MC. Emergence periods for B. longicaudatus ranged from 5-7 days for temperatures from 26 to 28@*C and lasted ca. 2 days for A. suspensa at temperatures above 22@*C. Both parasitoids and flies had high rates of mortality at temperatures above 28@*C. Total adult emergence was ca. 33% greater from A. suspensa larvae not exposed to parasitoids. Parasitoid emergence was significantly reduced at 22 and 24@*C in the driest MC. The use of 25% MC significantly increased diapause among last-instar parasitoid larvae. Pupal diapause was not observed for A. suspensa.

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Published

1976-12-01

Issue

Vol. 59, No. 4 (December 1976)

Section

Literature Review Articles

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