| Developmental stages of parasitoid wasp, Eretmocerus delhiensis, on greenhouse whitefly and relationship of its parasitism and host-feeding |
| Paper ID : 1302-3IICE (R1) |
| Authors: |
|
Arsalan Jamshidnia *1, Jafar Ebrahimifar2 1Department of Entomology and Plant Pathology, College of Aburaihan, University of Tehran 2Department of Plant Protection, Faculty of Agriculture, Shahid Chamran University of Ahvza, Ahvaz Province, Iran |
| Abstract: |
| TThe parasitoid wasp, Eretmocerus delhiensis Mani (Hym., Aphelinidae), is an active ecto-endo and solitary parasitoid of sugarcane whitefly in southwestern Iran. To evaluate it as a bio-control agent against greenhouse whitefly Trialeurodes vaporariorum (Westwood), the developmental stages of E. delhiensis and the host-feeding rate were investigated. The experiments were conducted under controllable conditions (25±1°C, 65±5% RH, and 16:8, L:D). To determine the developmental stages of the parasitoid wasp, different nymphal instars were exposed to E. delhiensis for 24 h. Fifty parasitized nymphs were selected for each instar of the greenhouse whitefly and developmental stages were recorded. The results showed the longest and shortest developmental stages for the 3rd and 1st nymphal instars, respectively. The oviposition duration of E. delhiensis parasitizing the 2nd and 3rd nymphal instars were not significantly different from those of the 1st and 4th nymphal instars, while the highest oviposition period was observed during the 4th nymphal instar The emergence rates of E. delhiensis were significant differences between the 1st, 2nd, 3rd, and 4th nymphal instars. The emergence rates of the 3rd and 2nd nymphal instars were significantly higher than those of the 1st and 4th ones. The linear regression analysis results revealed the increasing numbers of the parasitized nymphs by enhancing their host-feeding rates. According to our findings, parasitism of the parasitoid wasp, E. delhiensis, along with its host-feeding on all the nymphal instars of the greenhouse whitefly, Trialeurodes vaporariorum, could prove it to be a good candidate for suppressing greenhouse whitefly populations. |
| Keywords: |
| host-feeding, Trialeurodes vaporariorum, syn-ovigenic, thelytokous |
| Status : Paper Accepted (Oral Presentation) |
