Authors: Majid Mahmoudi Ahad Sahragard Jalal Jalali Sendi
Publish Date: 2009/08/28
Volume: 83, Issue: 1, Pages: 33-39
Abstract
Laboratory studies were conducted to determine the effects of Trioxys angelicae Haliday Hym Braconidae age and host density Aphis fabae Scopoli Hem Aphididae on selected attributes of parasitoid reproductive biology The number of hosts parasitized per day was used as an estimate of wasp fecundity Parasitoid longevity was not affected by host density and at host densities of 2 4 6 8 10 15 20 30 40 or 60 aphids per day the parasitoids lived an average of 896 ± 082 days at 21°C At host densities of ≤20 aphids per day lifetime fecundity of a single Trioxys angelicae female was limited by the number of hosts available Lifetime fecundity was highest with an average of 15814 ± 2033 at a density of 30 aphids per day the maximum number of aphids parasitized by any female was 235 Daily fecundity and sex ratio were affected by parasitoid age and host density Agespecific fecundity at different host densities fitted well to a nonlinear model In conclusion the fecundity and female progeny production of Trioxys angelicae as an important biological control agent of A fabae is influenced by host availability
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