Field persistence of Habrobracon hebetor (Say) (Hymenoptera: Braconidae) following augmentative releases against the millet head miner, Heliocheilus albipunctella (de Joannis) (Lepidoptera: Noctuidae), in the Sahel

Kaboré, Adama; Ba, Niango Malick; Dabire-Binso, Clémentine L.; Sanon, Antoine

doi:10.1016/j.biocontrol.2017.03.001

Cited by 21 publications

(36 citation statements)

References 31 publications

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“…The effectiveness of this parasitoid against the MHM was first demonstrated in the late 1980s in Senegal (Bhatnagar, 1987(Bhatnagar, , 1989, and subsequently in Niger in the early 2000s (Garba & Gaoh, 2008). In recent years, its effectiveness for augmentative biological control has been demonstrated in the Sahel (Ba et al, 2014(Ba et al, , 2013Kabore, Ba, Dabire-Binso, & Sanon, 2017;Payne et al, 2011), with an estimated yield gain of 34% (Baoua et al, 2014). The parasitoids are released from 15 cm × 25 cm small jute bags containing a mixture of millet grains and flour together with 25 larvae of the rice meal moth, Corcyra cephalonica (Stainton) (Lepidoptera: Pyralidae), and two mated H. hebetor females (Ba et al, 2014(Ba et al, , 2013.…”

Section: Introductionmentioning

confidence: 99%

Field dispersal of the parasitoid wasp Habrobracon hebetor (Hymenoptera: Braconidae) following augmentative release against the millet head miner Heliocheilus albipunctella (Lepidoptera: Noctuidae) in the Sahel

Baoua

Bâ²,

Amadou

et al. 2018

Biocontrol Science and Technology

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Pearl millet is one of the major staple food crops in Sub-Sahelian Africa, and the millet head miner (MHM) [Heliocheilus albipunctella] is its major pest, causing serious economic damage in the maturity period. We studied the dispersion patterns of the endogenous ectoparasitoid, Habrobracon hebetor (Hymenoptera: Braconidae), after augmentative releases in pearl millet fields for biological control of the MHM, in 2010 and 2011 in Burkina Faso and Niger. The parasitoids were released using 15 jute bags per release site. Parasitoid dispersion was indirectly monitored through weekly assessments of MHM parasitism by H. hebetor at different distances from release points (0, 3 and 5 km) and in control villages (15 km). Our findings indicate that the jute bags released approximately 900-1000 parasitoids per site over a period of three weeks. This initial parasitoid population led to higher parasitism of MHM larvae at the site of dissemination compared to farms at distances of 3 and 5 km. However, usually after five weeks, successive generations of H. hebetor dispersed up to 3 km, causing high levels of MHM larval mortality, which sometimes is similar to those of the release points. Based on these results, we recommend the release of parasitoids at sites spaced 3 km for timely and more efficient control of MHM populations.

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Section: Introductionmentioning

confidence: 99%

Field dispersal of the parasitoid wasp Habrobracon hebetor (Hymenoptera: Braconidae) following augmentative release against the millet head miner Heliocheilus albipunctella (Lepidoptera: Noctuidae) in the Sahel

Baoua

Bâ²,

Amadou

et al. 2018

Biocontrol Science and Technology

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“…Even though H. hebetor mass cultured on C. cephalonica has been successfully used for augmentative releases against the MHM in the Sahel (Kabore et al 2017;Baoua et al 2018), the field fitness of the parasitoid derived from the new proposed rearing method need to be further investigated. As indicated in other settings, rearing conditions can affect field performance of released parasitoids (Collier and Steenwyk 2004;Gandolfi et al 2003;Bloem et al 2004;Joyce et al 2010;Sepúlveda et al 2017).…”

Section: Discussionmentioning

confidence: 99%

“…Augmentative releases of H. hebetor led to a maximum of 80% parasitism of MHM larvae (Payne et al 2011;Ba et al 2013), resulting in yield increases of at least 30% . Although releasing H. hebetor controls MHM, further MHM outbreaks can occur in subsequent years because there are few alternate hosts for the parasitoid to survive on during the off-season (Kabore et al 2017). Consequently, new populations of parasitoids must be released each growing season.…”

Section: Introductionmentioning

confidence: 99%

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

Kaboré

Dabire-Binso

et al. 2019

Int J Trop Insect Sci

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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.

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“…Given the nature of the crop (annual), the nature of the pest (one generation per year), the short period of time when the target pest is present (pearl millet reproduction stage), and the low possibilities for released parasitoids to survive the long dry season (Kabore et al 2017), there is no reason to release more parasitoids than what is really needed. Apart from the economic implication, the release of excessive numbers of parasitoids per unit of area could lead to the reduction in their efficiency (Knipling 1977).…”

Section: Discussionmentioning

confidence: 99%

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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Field persistence of Habrobracon hebetor (Say) (Hymenoptera: Braconidae) following augmentative releases against the millet head miner, Heliocheilus albipunctella (de Joannis) (Lepidoptera: Noctuidae), in the Sahel

Cited by 21 publications

References 31 publications

Field dispersal of the parasitoid wasp Habrobracon hebetor (Hymenoptera: Braconidae) following augmentative release against the millet head miner Heliocheilus albipunctella (Lepidoptera: Noctuidae) in the Sahel

Field dispersal of the parasitoid wasp Habrobracon hebetor (Hymenoptera: Braconidae) following augmentative release against the millet head miner Heliocheilus albipunctella (Lepidoptera: Noctuidae) in the Sahel

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

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

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