Population dynamics and parasitism of Coniesta (= Haimbachia) ignefusalis, Sesamia calamistis, and Heliocheilus albipunctella in millet monoculture

Youm, O.; Gilstrap, F. E.

doi:10.1017/s1742758400014077

Cited by 12 publications

(9 citation statements)

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“…Differences in levels of parasitism, especially recorded early in the season, could then be attributed to our augmentative releases. H. hebetor naturally parasitises the MHM at rates ranging from 2% to 95%, but often towards the end of the season after the crop has been damaged (Bhatnagar, 1989;Gahukar et al, 1986;Youm & Gilstrap, 1993b). In our case, there is strong evidence of the rapid spread of H. hebetor in pearl millet field, covering a radius of 3 km.…”

Section: Discussionmentioning

confidence: 57%

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: Discussionmentioning

confidence: 57%

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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“…Cultural practices [i.e. late planting (Youm and Gilstrap ), intercropping and planting density (Gahukar ,b), and use of fertilizer (Tanzubil et al. )] have been examined experimentally as possible management options, but they have not been developed further.…”

Section: Introductionmentioning

confidence: 99%

“…Habrobracon hebetor Say (Hymenoptera: Braconidae) is a well‐known, gregarious ectoparasitoid of larvae from a wide range of economically important moth families, including Pyralidae (Eliopoulos and Stathas ; Ghimire and Phillips ,b), Gelechiidae (Jackson and Butler ; Ghimire and Phillips ,b), Tineidae (Ghimire and Phillips ,b), Geometrids (Ghimire and Phillips ,b), and Noctuidae (Ghimire and Phillips ,b; Rabie et al. ), including the millet head miner (Youm and Gilstrap ). There are several studies describing the use of commercially available H. hebetor populations in biological control, especially of pyralid pests in stored products (Brower et al.…”

Section: Introductionmentioning

confidence: 99%

“…Cultural practices [i.e. late planting (Youm and Gilstrap 1993), intercropping and planting density (Gahukar 1989a,b), and use of fertilizer (Tanzubil et al 2004)] have been examined experimentally as possible management options, but they have not been developed further. Since the 1980s, considerable international research resources have been allocated into screening and development of pearl millet resistant to the millet head miner (Gahukar 1987;Youm and Owusu 1998;Youm et al 2001).…”

Section: Introductionmentioning

confidence: 99%

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Estimating effect of augmentative biological control on grain yields from individual pearl millet heads

Baoua

Amadou

Oumarou

et al. 2013

J Applied Entomology

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Pearl millet is the principal staple food crop in large portions of Western Sub-Sahelian Africa and the millet head miner (Heliocheilus albipunctella) is one of its most devastating insect pests. Since 2006, augmentative mass releases of the larval ectoparasitoid, Habrobracon hebetor, have been conducted in Mali, Burkina Faso and Niger as part of minimizing pearl millet grain losses imposed by millet head miners. These ongoing mass releases are based on low-cost mass-rearing of both host larvae and parasitoids. A release of parasitoids consists of placing jute bags containing pearl millet grain and flour and parasitized host larvae near pearl millet fields. The total production costs of a single jute bag with parasitized rice moth larvae are US$ 3-4. Based on a study of 6634 individual pearl millet heads collected at harvest in 12 farmers' fields in southern Niger in 2010, we demonstrated (i) a strong negative correlation between pearl millet head damage (mining) and grain yield and (ii) that parasitism by H. hebetor reduced grain losses by, on average, 34% (comparison of infested millet heads with/without parasitism) within the given growing season. Additional benefits may include reduction in millet head miners in subsequent generations. Data from 900 pearl millet heads collected in nine farmers' fields in 2011 were used to confirm data trends observed in the 2010 data and to characterize the dispersal of parasitoids in upwind and downwind directions from a release site. This study provided a quantitative description of the negative impact of millet head miner infestations on pearl millet grain yields and of benefits on grain yield of parasitism by H. hebetor. Our findings strongly support (i) intensification of mass-rearing of H. hebetor, (ii) expansion of educational activities to increase local empowerment and understanding of the potential of augmentative biological control and (iii) optimization of H. hebetor mass release programmes among smallholders in Sub-Sahelian Africa.

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“…Brown, Gilstrap, 1993;Harris, 1962). It is not known to be a major P earl millet is the major staple food crop in pest of other cereals, and its importance as a pest…”

Section: Introductionmentioning

confidence: 99%

The Potential Use of Pheromones for the Management of the Millet Stemborer, Coniesta Ignefusalis (Hampson)

Youm¹,

Beevor

Hall

et al. 1997

Int. J. Trop. Insect Sci.

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Recent studies on the identification and evaluation of the millet stemborer Coniesta ignefusalis female sex pheromone have shown that pheromone technology is promising as a management component. A review of research shows that an effective pheromone trap has been developed and successfully tested in eight countries in West Africa, through the West and Central African Millet Research Network (WCAMRN/ ROCAFREMI). A regional wide-scale stemborer monitoring network has been developed and is being implemented. Studies on mass trapping and mating disruption indicate that the two techniques have much potential in C. ignefusalis management. Prospects for the implementation of pheromone technology to manage C. ignefusalis in the context of an IPM scheme are discussed.Resume-Des etudes recentes sur l'identification et 1'evaluation de la pheromone sexuelle de la femelle du foreur de tiges de mil, Coniesta ignefusalis, ont demontre que la technologie de gestion du foreur basee sur les pheromones etait prometteuses. Une revue de la recherche dans le domaine indique qu'un piege a pheromone fiable a ete mis au point et teste dans huit pays de l'Afrique de 1'Ouest, a travers le Reseau Ouest et Centre Africain pour la Recherche sur le Mil (ROCAFREMI). Une surveillance regionale a grande echelle a ete entreprise et mise en application. Les resultats des tests sur le piegeage en masse et la confusion sexuelle demontrent que ces deux techniques sont prometteuse dans la lutte contre C. ignefusalis. Les perspectives d'application de la technologie basee sur la pheromone dans la gestion de C. ignefusalis dans un contexte schematique de lutte integree ont fait l'objet de discussion.

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Population dynamics and parasitism of Coniesta (= Haimbachia) ignefusalis, Sesamia calamistis, and Heliocheilus albipunctella in millet monoculture

Cited by 12 publications

References 1 publication

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

Estimating effect of augmentative biological control on grain yields from individual pearl millet heads

The Potential Use of Pheromones for the Management of the Millet Stemborer, Coniesta Ignefusalis (Hampson)

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