The influence of two endoparasitic wasps, Hyposoter didymator and Chelonus inanitus, on the growth and food consumption of their host larva Spodoptera littoralis

Morales, Jairo; Medina, Pilar; Viñuela, Elisa

doi:10.1007/s10526-006-9026-4

Cited by 18 publications

(8 citation statements)

References 27 publications

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“…For example, five parasitoids of S. frugiperda , namely Aleiodes laphygmae (Viereck) , Campoletis sonorensis (Cameron), Chelonus insularis (Cresson) , Cotesia marginiventris (Cresson) and Meteorus laphygmae (Viereck), decreased larval feeding by at least 80% [30]. This was also reported for the congeneric species Spodoptera littoralis (Boisduval), where food consumption and growth were significantly reduced by the endoparasitoids Hyposoter didymator (Thunberg) and Chelonus inanitus (Linnaeus) [31]. The effect of parasitism by C. luteum on S. frugiperda larvae could result from the different mechanisms associated with the parasitism process.…”

Section: Discussionmentioning

confidence: 71%

Evidence of Leaf Consumption Rate Decrease in Fall Armyworm, Spodoptera frugiperda, Larvae Parasitized by Coccygidium luteum

Agboyi¹,

Mensah²,

Clottey³

et al. 2019

Insects

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Biological control is one of the best options for the sustainable management of the invasive maize pest Spodoptera frugiperda in Africa. However, there is limited knowledge of the efficacy of native natural enemies of S. frugiperda and their potential use in integrated pest management. The endoparasitoid wasp Coccygidium luteum is one of the natural enemies of S. frugiperda in Africa. This study assessed, under laboratory conditions, the effect of C. luteum on the leaf consumption rate of its host. Fifty first instar S. frugiperda larvae were exposed to C. luteum for oviposition and the maize leaf consumption rate of parasitized larvae was assessed and compared to 50 unparasitized larvae from the same cohort. Coccygidium luteum completed a generation, from egg to adult emergence, in 16.7 days. The leaf consumption rate of parasitized S. frugiperda larvae declined gradually compared to unparasitized larvae and the overall consumption reduction by parasitized S. frugiperda larvae was 89%. Our findings show that C. luteum could reduce damage caused by S. frugiperda to maize farms but, prior to its use in biological control programmes, further studies are needed to assess potential parasitism rates in field conditions and develop a cost-effective mass production system.

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Section: Discussionmentioning

confidence: 71%

Evidence of Leaf Consumption Rate Decrease in Fall Armyworm, Spodoptera frugiperda, Larvae Parasitized by Coccygidium luteum

Agboyi¹,

Mensah²,

Clottey³

et al. 2019

Insects

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“…Insects express robust immune reactions to parasitoid eggs and research has focused on the actions of maternal factors that mediate host immunosuppression following deposition of parasitoid eggs 3 . Reports on endocrine mechanisms responsible for changing feeding behaviors and development are relatively scant 4 5 6 7 8 .…”

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confidence: 99%

The Endoparasitoid, Cotesia vestalis, Regulates Host Physiology by Reprogramming the Neuropeptide Transcriptional Network

Shi

Dong

et al. 2015

Sci Rep

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Endoparasitoids develop inside another insect by regulating host immunity and development via maternal factors injected into hosts during oviposition. Prior results have provided insights into parasitism-induced immunosuppression, including the neuropeptide accumulation in parasitized insects. Nonetheless, our understanding of neuropeptide influence on host development and behavior is not yet complete. We posed the hypothesis that parasitization alters expression of genes encoding pro-neuropeptides and used larvae of Plutella xylostella and its endoparasitoid, Cotesia vestalis to test our hypothesis. We prepared transcriptomes from the larval P. xylostella brain-CC-CA complex and identified transcripts encoding 19 neuropeptides. All corresponding cDNAs were confirmed by RACE. Our results demonstrate that parasitism significantly down-regulated, or delayed, expression of genes encoding pro-neuropeptides within 48 h post-parasitization. Changing expression of these genes may account for the previously reported decreased feeding behavior, reduced growth rates and aborted development in the host larvae. In effect, parasitization may operate at the molecular level within the CNS to create global changes in larval host biology. The significance of our finding is that, in addition to the known effects on immunity, parasitoids influence host pro-neuropeptide gene transcription. This finding reveals a new mechanism operating in host-parasitoid relationships to the advantage of the parasitoid.

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“…Moreover, C. inanitus manipulates the host development because parasitized larvae grow less than non-parasitized ones, due to the drastic reduction in food consumption since the early stages [21,30]. It has been reported that the final body weight of parasitized S. littoralis larvae only reaches 13% of the maximum weight of non-parasitized sixth-instar larvae [54]. Therefore, even though C. inanitus is an extreme koinobiont that kills the host in an advanced developmental stage, parasitized larvae cause less damage to plants.…”

Section: Discussionmentioning

confidence: 99%

Comparison of the Parasitization of Chelonus inanitus L. (Hymenoptera: Braconidae) in Two Spodoptera Pests and Evaluation of the Procedure for Its Production

Magaña¹,

Dáder²,

Sancho³

et al. 2022

Insects

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Chelonus inanitus (L.) is an egg-larval parasitoid of noctuids Spodoptera exigua (Hübner) and S. littoralis (Boisduval), whose mass rearing or real potential has not been targeted yet. To improve the rearing in the factitious host Ephestia kuehniella Zeller, we investigated the influence of host age and number of females parasitizing simultaneously on the overall rearing success, the influence of host age on the life cycle, and the influence of host species on the parasitoid body size. The proportion of emerging C. inanitus was higher from young host eggs, but more females emerged from mature eggs. Under high parasitoid competition, we observed a reduction in non-parasitized hosts without reducing parasitoid emergence. The parasitoid life cycle was longer in females, but the mismatch between sexes was smaller in mature eggs. The parasitoid size was smaller in the factitious host than in the natural hosts. Under semi-field conditions, we investigated the competition among parasitoid females on the overall parasitism success. The reproductive parasitism was more successful in S. exigua than in S. littoralis, and the maximum emergence was reached with three and four females, respectively. The control of S. littoralis may be attributed to the high developmental mortality, a non-reproductive parasitism that is often underestimated.

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The influence of two endoparasitic wasps, Hyposoter didymator and Chelonus inanitus, on the growth and food consumption of their host larva Spodoptera littoralis

Cited by 18 publications

References 27 publications

Evidence of Leaf Consumption Rate Decrease in Fall Armyworm, Spodoptera frugiperda, Larvae Parasitized by Coccygidium luteum

Evidence of Leaf Consumption Rate Decrease in Fall Armyworm, Spodoptera frugiperda, Larvae Parasitized by Coccygidium luteum

The Endoparasitoid, Cotesia vestalis, Regulates Host Physiology by Reprogramming the Neuropeptide Transcriptional Network

Comparison of the Parasitization of Chelonus inanitus L. (Hymenoptera: Braconidae) in Two Spodoptera Pests and Evaluation of the Procedure for Its Production

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