Kabore, A and Ba, M N and Dabire-Binso, C and Sanon, A (2019) Towards development of a parasitoid cottage industry of the parasitoid wasp Habrobracon hebetor (say): optimum rearing and releases conditions for successful biological control of the millet head miner Heliocheilus albipunctella (De Joannis) in the Sahel. International Journal of Tropical Insect Science (TSI). pp. 1-9. ISSN 1742-7584
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Abstract
Augmentative biological control by the parasitoid Habrobracon hebetor (Say) (Hymenoptera: Braconidae) is the most promising strategy to control millet head miner, Heliocheilus albipunctella (De Joannis) a major insect pest of pearl millet in the Sahel. As H. hebetor survival is somehow challenging during the nine month long off-season when the host, H. albipunctella is in diapause, there needs to be a sufficient supply of parasitoids for fresh release each year. Therefore, the aim of this study was to establish a small-scale parasitoid rearing process adjusted to the Sahel conditions that can be scaled-up as necessary. We conducted experiments to fine-tune and standardize the rearing technique of H. hebetor for cottage industrial use. The results showed that parasitoids fed with 30% honey solution and supplied daily with one late-larval-stage Corcyra cephalonica Stainton (Lepidotera, Pyralidae) produced highest number of progeny. The optimal times for mating and egg fertilization, was achieved when a male and female pair was confined for 24 h in a 30-cc vial. Our findings indicated that, compared with the conventional rearing method -2 females supplied once with 25 C. cephalonica larvae-, this new method resulted in 14-times greater parasitoid production. Furthermore parasitoid female can be stored for up to three weeks at fluctuating 23–32°C temperature and 25%–80% relative humidity for numbers accumulations prior to on-farm augmentative releases without altering its fitness.
| Item Type: | Article |
|---|---|
| Divisions: | Research Program : West & Central Africa |
| CRP: | UNSPECIFIED |
| Uncontrolled Keywords: | Mass rearing, Corcyra cephalonica, Feeding medium, Lifespan, Fecundity, Burkina Faso, Pearl millet |
| Subjects: | Mandate crops > Millets > Pearl Millet Others > Entomology Others > Sahel Region |
| Depositing User: | Mr Arun S |
| Date Deposited: | 09 Sep 2019 06:40 |
| Last Modified: | 09 Sep 2019 06:40 |
| URI: | http://oar.icrisat.org/id/eprint/11294 |
| Official URL: | https://doi.org/10.1007/s42690-019-00005-w |
| Projects: | UNSPECIFIED |
| Funders: | McKnight Foundation |
| Acknowledgement: | This work was supported by the Collaborative Crop Research Program (CCRP) of the McKnight Foundation, Minneapolis, MN [grant numbers 09-038; 2009-2012]. The opinions expressed herein are those of the authors and do not necessarily reflect the views of the McKnight Foundation. |
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