van Nouhuys, S and Harris, DC and Stephen, FM and Galligan, LD and Hajek, AE (2022) Association of the native parasitic nematode Deladenus proximus with individuals and populations of the native woodwasp Sirex nigricornis. In: Agricultural and Forest Entomology .
Full text not available from this repository.Abstract
Parasitic stages of the North American native dimorphic nematode Deladenus proximus develop within larvae of the native North American siricid Sirex nigricornis and sterilize many of the eggs in adult females. Sirex nigricornis were reared from felled trees or trapped in Arkansas and Louisiana in 2017�2019 and parasitism by D. proximus was evaluated. Deladenus proximus parasitized 0.16�0.43 of S. nigricornis individuals, among sites and years. Parasitized males were smaller than healthy males, and more males were parasitized than females emerging from the same trees. Rate of parasitism increased with increasing S. nigricornis density per tree, and, as per tree density increased, so did the proportion that was male. Egg sterilization (woodwasp eggs killed and inhabited by nematodes) was partial, with an average proportion of 0.66�0.88 woodwasp eggs sterilized by D. proximus per female S. nigricornis, differing significantly by site. As the numbers of eggs in a female increased, the proportion of eggs sterilized declined. Comparing data from this study with others, a trend is reported for variable levels of egg sterilization in Sirex females, with 0 or 100 sterilization often occurring in novel host/parasite associations and partial (averages between 50 and 100) sterilization occurring when host/parasite associations have co-evolved. © 2022 Royal Entomological Society.
| Item Type: | Journal Article |
|---|---|
| Publication: | Agricultural and Forest Entomology |
| Publisher: | John Wiley and Sons Inc |
| Additional Information: | The copyright for this article belongs to John Wiley and Sons Inc |
| Department/Centre: | Division of Biological Sciences > Centre for Ecological Sciences |
| Date Deposited: | 21 Feb 2022 12:05 |
| Last Modified: | 21 Feb 2022 12:05 |
| URI: | http://eprints.iisc.ac.in/id/eprint/71409 |
Actions (login required)
 |
View Item |
