Study on some biological characteristics of parasitoid wasp Cotesia vestalis in different mass-rearing conditions

Document Type : Research Paper

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Abstract

The diamondback moth, Plutella xylostella, is a destructive pest of crucifers in different parts of the word. Cotesia vestalis(Hym.: Braconidae)  is one of the best agents for application in biological control programs of this pest. In order to examine the quality control of C. vestalis including: parasitism rate, survival rate, offspring sex ratio, adult longevity and progeny fecundity in different mass-rearing conditions, an experiment was conducted with three different treatments. Allexperiments were conductedin the laboratory at 26±2°C, 75±5%RHand 16L:8D hphotoperiod. The treatments including (1) (SLD) a big cage (55×70×100 cm), 12 cabbage plants, 240 pest larvae and 30 female parasitoid (2) (BMD) a smaller cage (50×55×70 cm), 6 cabbage plants, 120 pest larvae and 15 female parasitoid (3) (BMU) a big cage, 12 cabbage plants and a natural population of pest larvae. Results showed that in treatments of BMD and SLD, adult's survival rate of C. vestalis were 62.8±4.2 and 69.8±3.2, adult's longevity were 13.5±0.04 and 13±0.03, progeny fecundity were 200.4±6.2 and 195.9±5.7 and production of pupae were 57.2±0.02 and 56±0.02, respectively. Results show that there was a significant difference between BMD and SLD compared to BMU for mass production of C. vestalis.

 

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References

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BioControl in Plant Protection
Volume 4, Issue 2 - Serial Number 8
February 2017
Pages 99-108

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