Biological control of the millet head miner Heliocheilus albipunctella in the Sahelian region by augmentative releases of the parasitoid wasp Habrobracon hebetor: effectiveness and farmers’ perceptions

Bâ, M.; Baoua, Ibrahim; Ndiaye, Mamadou; Dabire-Binso, Clémentine L.; Sanon, Antoine; Tamò, Manuele

doi:10.1007/s12600-013-0317-x

Cited by 30 publications

(46 citation statements)

References 21 publications

(18 reference statements)

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“…Pour les deux années, il a été noté une augmentation moyenne des taux de parasitisme de la MEM variant de 168 à 1398 % consécutive au lâcher de H. hebetor. Le dispositif mis en place a donc contribué à la mortalité des larves de la MEM, comme déjà démontré par Ba et al (2013) et Baoua et al (2014.…”

Section: Discussionunclassified

Gestion de la chenille mineuse de l'épi du mil par des lâchers du parasitoïde Habrobracon hebetor Say au Niger

et al. 2017

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Résumé -La chenille mineuse de l'épi du mil, Heliocheilus albipunctella De Joannis, est l'un des principaux ravageurs du mil en zone sahélienne. En 2015 et 2016, une démarche de lutte biologique de grande envergure a été initiée par des lâchers du parasitoïde antagoniste ectolarvaire Habrobracon hebetor Say dans les cinq régions du Niger. Des équipes incluant les organisations de producteurs ont été mises en place pour la sensibilisation des agriculteurs, l'identification des zones d'infestation du ravageur et la mise en place de 9177 sacs de lâcher. Les surfaces couvertes ont été estimées à 1 417 680 ha en 2015 et 1 521 330 ha en 2016 soit 21 % des surfaces en mil dans les régions concernées. Les évaluations menées au cours des deux années ont permis de noter une augmentation des taux de parasitisme de la chenille mineuse de 168 à 1398 % dans les villages de lâcher par rapport aux villages témoins. L'enquête sur la perception a révélé une appréciation positive de 77 % des répondants. Ils ont estimé la mortalité moyenne des larves du ravageur à 76 % et les gains de rendement à 50 %.Mots clés : Pennisetum glaucum / Heliocheilus albipunctella / Habrobracon hebetor / enquête / perception Abstract -Management of the pearl millet head miner through releases of the parasitoid wasp Habrobracon hebetor Say in Niger. Millet head miner Heliocheilus albipunctella De Joannis is one of the main insect pests of millet in the Sahel. In 2015 and 2016, a large-scale biological process was initiated with the parasitoid Habrobracon hebetor Say released in five regions of Niger. Regional teams, including farmers' organizations, were set up for promoting producers' awareness, identifying infested areas and placing 9177 release bags. The surface covered was estimated to be 1 417 680 ha in 2015 and 1 521 330 ha in 2016, about 21% of the millet cropped area in the regions concerned. Evaluations conducted during two years showed an increase of 168% to 1398% for the parasitism rate on MHM larvae in the villages where parasitoids were released compared to control villages. Survey about farmers' perception revealed that the operation is beneficial for more than 77% of respondents. They estimated an average 76% larvae mortality rate and a 50% increase in millet yield due to the parasitoid release.

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Section: Discussionunclassified

Gestion de la chenille mineuse de l'épi du mil par des lâchers du parasitoïde Habrobracon hebetor Say au Niger

et al. 2017

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“…Typically, the MHM moth lays eggs on emerging panicles (Gahukar et al 1986) and it takes two weeks for the parasitoid progeny to disperse from bags after deployment . This timing coincides with the growth of MHM into third and Though the ability of farmers to describe crop insect pests (Ochou et al 1998;Tefera, 2004;Poubom et al 2005;Abtew et al 2016), including pearl millet insects and the MHM life cycle (Tanzubil and Yakubu 1997;Ba et al 2013), has been well documented in Africa, egg scouting by farmers would require some specific training (Silvie et al 2001;Gautam et al 2017). Also, scouting for eggs could be time consuming.…”

Section: Discussionmentioning

confidence: 61%

“…In each release village, the parasitoid bags were evenly distributed within five pearl millet fields (three bags per farmer's field) using the method described by Ba et al (2014). The jute bags were suspended to the ceiling of traditional straw granaries located in farmers fields and emerging parasitoids were able to escape through the jute mesh and straw granaries and disperse to parasitize MHM larvae in millet fields (Ba et al 2013(Ba et al , 2014. In each village the bags were evenly distributed to five farmers (three bags per farmer), one in the center of the village and one in each direction (E, W, N and S) with each of E, W, N and S farm 500 m away from the farm in the center of the village (Ba et al 2014).…”

Section: Parasitoid Rearingmentioning

confidence: 99%

“…Biological control has emerged as the most attractive solution for controlling the MHM and the gregarious parasitoid Habrobracon (= Bracon) hebetor Say (Hymenoptera: Braconidae) is considered a natural enemy with great biocontrol potential (Gahukar et al 1986;Bhatnagar 1987). Recently, augmentative releases of H. hebetor have been successful against the MHM in Niger (Payne et al 2011;Ba et al 2013Ba et al , 2014Baoua et al 2014Baoua et al , 2018. This has led to parasitism of up to 80% of the MHM larvae (Ba et al 2013(Ba et al , 2014, resulting in 34% increase in grain yield .…”

Section: Introductionmentioning

confidence: 99%

“…Recently, augmentative releases of H. hebetor have been successful against the MHM in Niger (Payne et al 2011;Ba et al 2013Ba et al , 2014Baoua et al 2014Baoua et al , 2018. This has led to parasitism of up to 80% of the MHM larvae (Ba et al 2013(Ba et al , 2014, resulting in 34% increase in grain yield .…”

Section: Introductionmentioning

confidence: 99%

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Timing of releases of the parasitoid Habrobracon hebetor and numbers needed in augmentative biological control against the millet head miner Heliocheilus albipunctella

Amadou

Bâ²,

Baoua

et al. 2019

BioControl

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Heliocheilus albipunctella de Joannis (Lepidoptera: Noctuidae) is one of the major insect pests of pearl millet in the Sahel. The native parasitoid, Habrobracon hebetor Say (Hymenoptera: Braconidae), is currently being promoted for augmentative biological control of the pest in the Sahel. The current study was carried out to identify the right time for releases of the parasitoid using either pearl millet growing stage, or pest occurrence as reference, and to determine the optimal number of parasitoids needed to cover a given area. Our results indicate that release of parasitoids at the panicle emergence stage or sixweeks after first sight of eggs of H. albipunctella lead to highest parasitism of H. albipunctella larvae by H.hebetor. The dose of 800 parasitoids for a distance of 3 km radius was enough for controlling H. albipunctella. The implications of the results are discussed toward cost effective and practical recommendation adapted to the Sahelian conditions.

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CRISPR/Cas9‐mediated mutagenesis of the white gene in an ectoparasitic wasp, Habrobracon hebetor

Bai,

Yu,

Xiong

et al. 2023

Pest Management Science

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BACKGROUNDThe ectoparasitic wasp Habrobracon hebetor (Hymenoptera, Braconidae) can parasitize various species of lepidopteran pests. To maximize its potential for biological control, it is necessary to investigate its gene function through genome engineering.RESULTSTo test the effectiveness of genome engineering system in H. hebetor, we injected the mixture of clustered regularly interspaced short palindromic repeats (CRISPR) ‐associated (Cas) 9 protein and single guide RNA(s) targeting gene white into embryos. The resulting mutants display a phenotype of eye pigment loss. The phenotype was caused by small indel and is heritable. Then, we compared some biological parameters between wildtype and mutant, and found there were no significant differences in other parameters except for the offspring female rate and adult longevity. In addition, cocoons could be used to extract genomic DNA for genotype during the gene editing process without causing unnecessary harm to H. hebetor.CONCLUSIONOur results demonstrate that the CRISPR/Cas9 system can be used for H. hebetor genome editing and it does not adversely affect biological parameters of the parasitoid wasps. We also provide a feasible non‐invasive genotype detection method using genomic DNA extracted from cocoons. Our study introduces a novel tool and method for studying gene function in H. hebetor, and may contribute to better application of H. hebetor in biocontrol. © 2023 Society of Chemical Industry.

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Biological control of the millet head miner Heliocheilus albipunctella in the Sahelian region by augmentative releases of the parasitoid wasp Habrobracon hebetor: effectiveness and farmers’ perceptions

Cited by 30 publications

References 21 publications

Gestion de la chenille mineuse de l'épi du mil par des lâchers du parasitoïde Habrobracon hebetor Say au Niger

Gestion de la chenille mineuse de l'épi du mil par des lâchers du parasitoïde Habrobracon hebetor Say au Niger

Timing of releases of the parasitoid Habrobracon hebetor and numbers needed in augmentative biological control against the millet head miner Heliocheilus albipunctella

CRISPR/Cas9‐mediated mutagenesis of the white gene in an ectoparasitic wasp, Habrobracon hebetor

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