Life-fertility tables of Bracon hebetor Say (Hymenoptera: Braconidae) reared on Heliocheilus albipunctella de Joannis (Lepidoptera: Noctuidae)

Youm, O.; Gilstrap, F. E.

doi:10.1017/s1742758400014120

Cited by 10 publications

(13 citation statements)

References 9 publications

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“…First experimental releases of parasitoids were carried out in 1985 in Senegal (Bathnagar 1989). At the same time, studies of the life cycle of this parasitoid (Youm and Gilstrap 1993) provided the basis for developing a very simple mass rearing technique of H. hebetor (Bal et al 2002). Release techniques for this parasitoid were subsequently refined (Baoua et al (2002), leading to experimental on-farm releases of In addition to the releases of parasitoids, we evaluate farmers' perceptions because the success of pest management program could depend on pest recognition (Fujisaka 1992;Litsinger et al 1980) and farmers practices (Heong 1985;Teng 1987;Morse and Buhler 1997).…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2013

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On-farm augmentative releases of the parasitoid Habrobracon hebetor (Say) for controlling the millet head miner (MHM) Heliocheilus albipunctella (de Joannis) was experimented in Burkina Faso, Mali and Niger from 2007 to 2009. In addition, a survey of farmers' perceptions of insect pests, with particular focus on MHM, and the biological control program (BCP) was carried out. Our findings indicate a significant increase of MHM parasitization rate after the releases with up to 97% mortality. The survey on farmer's perceptions revealed a fair knowledge of the MHM and the ability of farmers to describe the pest and its damage. Farmers claimed that the biocontrol agent H. hebetor is effective and perceived a significant gain in grain yield due to this control strategy. Implications of these findings for a large extension of the MHM biocontrol program are discussed.

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Section: Introductionmentioning

confidence: 99%

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

et al. 2013

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“…Habrobracon hebetor (Say) (=Bracon hebetor) (Haeselbarth 1983;Amir-Maafi and Chi 2006) is a cosmopolitan polyphagous ectoparasitoid that has been studied as a biological control agent of various lepidopterian pests in several countries (Gerling 1971;Youm and Gilstrap 1993;Baker et al 1995;Magro and Parra 2001;Hopper 2003). H. hebetor has been used to control Helicoverpa armigera Hübner and Ostrinia nubilalis Hübner in Iran and a mass rearing program has been intiated (Navaei et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Comparative study of the population level effects of carbaryl and abamectin on larval ectoparasitoid Habrobracon hebetor Say (Hymenoptera: Braconidae)

et al. 2011

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Habrobracon hebetor Say is one of the most important ectoparasitoids of the larval stage of many invasive agricultural pests such as noctuid and pyralid moths. Lethal and sublethal effects of carbaryl and abamectin were assessed on the ectoparasitoid H. hebetor in laboratory conditions. Dose-response bioassays were carried out on immature and adult stages by using dipping and contact residue methods, respectively. LC 50 (lethal concentration for 50%) values of carbaryl and abamectin were 31.19 and 4.16 mg a.i. l -1 on larval stage and 12.6 and 4.42 mg a.i. l -1 on adults, respectively. In order to assess the sublethal effects, adult wasps were exposed to an LC 30 of each insecticide and then the demographic parameters of live wasps were studied. The results showed that the intrinsic rate of increase (r m ), finite rate of increase (k), net reproductive rate (R 0 ) and gross reproductive rate (GRR) were significantly affected by the insecticides. The highest and the lowest r m values were 0.23 and 0.17 in control and carbaryl-treated insects, respectively. The sex ratio of H. hebetor offspring was not significantly affected by either insecticide. The results showed that carbaryl had more adverse effects on population parameters of the parasitoid compared to abamectin. Field studies are needed to determine the total effects of the pesticides on H. hebetor.

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“…Several studies have examined the life cycle and behavior of the MHM and identified its potential natural enemies (Guevremont, 1981(Guevremont, , 1982Gahukar et al, 1986;Bhatnagar, 1989;Gahukar, 1990;Ndoye, 1992;Youm and Gilstrap, 1993;Krall et al, 1995;Henzell et al, 1997;Youm and Owusu, 1998;Baoua et al, 2009). Infestations occur annually, and are especially severe in early-planted or maturing millet and in areas with sandy soils (Gahukar, 1987;Youm and Gilstrap, 1993;Nwanze and Sivakumar, 1990). In Niger, adult MHM moths lay their eggs on millet panicles as they emerge from early August to early September.…”

Section: Introductionmentioning

confidence: 99%

“…H. hebetor is a tiny wasp that parasitizes up to 95 percent of MHM larvae, improving yields by up to 41 percent (Ba et al, 2013;Baoua et al, 2014). The H. hebetor wasp stings the MHM larvae, causing paralysis and stopping metamorphosis, and then lays eggs on the larva (Youm and Gilstrap, 1993). Over 10 wasp larvae, feeding on the host, can develop in one host larva.…”

Section: Introductionmentioning

confidence: 99%

Economic feasibility of an augmentative biological control industry in Niger

Guerci

Norton

Bâ³

et al. 2018

Crop Protection

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Farmers in Niger are vulnerable to high millet yield losses due to the millet head miner, Heliocheilus albipunctella De Joannis (Lepidoptera: Noctuidae), for which pest control options are limited. Researchers have developed a procedure to multiply and spread an augmentative biological control agent Habrobracon hebetor Say (Hymenoptera: Braconidae) which is effective in limiting millet yield losses due to the pest. This study assesses the economic viability of small businesses to produce and sell biological control agents. It analyzes the profitability of the businesses under alternative pricing regimes given estimated costs to produce and distribute biological control agents. The economic assessment provides budget analysis for potential businesses and discusses options for scaling, price setting, and organizing. Our study suggests that the small H. hebetor industry should turn a profit in Niger at relatively low prices for the biological control agents of $3.00-$4.00 per bag with 15 bags needed per village. Competitive wages are achievable for the businesses that sell to at least 13 villages. Each business would hire three workers from late May to late August. Commercialization of H. hebetor would generate opportunities for wide geographic distribution of the technology on a sustainable basis in Niger.

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Life-fertility tables of Bracon hebetor Say (Hymenoptera: Braconidae) reared on Heliocheilus albipunctella de Joannis (Lepidoptera: Noctuidae)

Cited by 10 publications

References 9 publications

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

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

Comparative study of the population level effects of carbaryl and abamectin on larval ectoparasitoid Habrobracon hebetor Say (Hymenoptera: Braconidae)

Economic feasibility of an augmentative biological control industry in Niger

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