Performance of the newly identified endoparasitoid <i>Cotesia icipe</i> Fernandez‐Triana &amp; Fiaboe on <i>Spodoptera littoralis</i> (Boisduval)

Agbodzavu, Mawufe Komi; Lagat, Zipporah O.; Gikungu, Mary; Rwomushana, Ivan; Ekesi, Sunday; Fiaboe, Komi K. M.

doi:10.1111/jen.12514

Cited by 11 publications

(10 citation statements)

References 41 publications

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“…The new associations of native parasitoids with S. frugiperda might be attributable to the occurrence of several other Spodoptera species in West Africa, such as S. exempta, S. exigua and S. littoralis. Interestingly, there is only very little overlap between the parasitoid guild of S. frugiperda and the one associated with cereal stem borers such as Eldana saccharina Walker, Sesamia spp., Busseola fusca (Fuller), and Chilo aleniellus (Strand) [46][47][48][49][50][51].…”

Section: Parasitoid Complex and Parasitism Of S Frugiperda In Ghana mentioning

confidence: 99%

Parasitoid Complex of Fall Armyworm, Spodoptera frugiperda, in Ghana and Benin

Agboyi¹,

Goergen

Beseh

et al. 2020

Insects

104

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The fall armyworm, Spodoptera frugiperda, a moth originating from the American continent, has recently invaded most African countries, where it is seriously threatening food security as a pest of cereals. The current management methods rely heavily on the use of synthetic insecticides but there is a need for more sustainable control methods, including biological control. Surveys were conducted in two West African countries, Ghana and Benin, to determine the native parasitoid complex and assess parasitism rates of S. frugiperda. Samples of S. frugiperda eggs and larvae were collected in maize fields located in 56 and 90 localities of Ghana and Benin, respectively, from July 2018 to July 2019. Ten species were found parasitizing the pest, including two egg parasitoids, one egg–larval, five larval and two larval–pupal parasitoids. The two most abundant parasitoids in both countries were two Braconidae: the egg-larval parasitoid Chelonus bifoveolatus and the larval parasitoid Coccygidum luteum. Parasitism rates were determined in three Ghanaian regions and averages varied from 0% to 75% between sites and from 5% to 38% between regions. These data provide an important baseline for the development of various biological control options. The two egg parasitoids, Telenomus remus and Trichogramma sp. can be used in augmentative biological control and investigations should be conducted to assess how cultural practices can enhance the action of the main parasitoids, C. luteum and Ch. bifoveolatus, in the field. Understanding the parasitoid complex of S. frugiperda in Africa is also necessary before any development of classical biological controls involving the introduction of parasitoids from the Americas.

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Section: Parasitoid Complex and Parasitism Of S Frugiperda In Ghana mentioning

confidence: 99%

Parasitoid Complex of Fall Armyworm, Spodoptera frugiperda, in Ghana and Benin

Agboyi¹,

Goergen

Beseh

et al. 2020

Insects

104

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“…The parasitism rate obtained for C. icipe on S. exigua when using a single female (9.7%) was lower than that obtained for the same parasitoid on S. littoralis (42.99%; Agbodzavu et al., ). It was also relatively lower compared to the parasitism rates reported for other parasitoids on S. exigua .…”

Section: Discussionmentioning

confidence: 73%

“…Plants infested with second instar larvae of S. littoralis were introduced in ventilated perspex cages as described above in Section 2.2 containing 2‐ to 3‐day‐old mated C. icipe adults. Our preliminary observations showed that second instar larvae were more readily accepted for oviposition by C. icipe and were therefore used (Agbodzavu et al., ). The parasitoids were fed on honey, and hosts were offered to them for oviposition for a period of 24 hr.…”

Section: Methodsmentioning

confidence: 99%

Acceptability and suitability of Spodoptera exigua (Hübner) for Cotesia icipe Fernandez‐Triana & Fiaboe on amaranth

Agbodzavu

Gikungu

Lagat

et al. 2018

J Applied Entomology

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The beet armyworm Spodoptera exigua (Hübner) (Lepidoptera: Noctuidae) is a polyphagous insect that is distributed worldwide and was recently reported as an important pest on African indigenous vegetables. Cotesia icipe Fernandez‐Triana & Fiaboe (Hymenoptera: Braconidae) is a recently described parasitoid, reported from various Afrotropical countries. This work investigated the performance of C. icipe on S. exigua infesting Amaranthus dubius Mart. ex Thell. under laboratory conditions. Cotesia icipe was aggressive on the host and successfully oviposited on S. exigua with 70% of parasitoid females ovipositing after 2 hr of exposure. Parasitoid densities significantly affected the parasitism rate and the nonreproductive larval mortality. Parasitism rate was 9.7 ± 0.8% and 59.5 ± 3.1% for a single and cohort of five females released, respectively, when offered 50 host larvae. The cohort female release resulted in significantly higher larval nonreproductive mortality than the single release. However, there was no significant difference between parasitoid release densities in regard to pupal nonreproductive mortality. The larval and pupal mortalities in the presence of C. icipe were significantly higher than the natural mortalities at both parasitoid release densities. The parasitoid sex ratio was female‐biased for the cohort females but balanced when a single female was released. The hind tibia and forewing lengths were not affected by the density of female parasitoids but there were variations according to sex. The implication of these findings on the potential use of C. icipe for biological control of S. exigua in amaranth production systems is discussed.

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“…52 In this study, we demonstrated that C. icipe had a female-biased ratio in all the host species, a finding similar to previous studies in which C. icipe was found to be female biased irrespective of the host stage attacked on both S. frugiperda 28 and S. littoralis. 25 Other related species that exhibit a female-biased sex ratio irrespective of the host species they were offered include C. plutellae 53 and C. flavipes. 54 The fact that C. icipe is female biased in all the tested hosts, makes it a very promising candidate for biological control of these pests, especially S. frugiperda and S. littoralis.…”

Section: Discussionmentioning

confidence: 99%

“…n. (both Hymenoptera: Trichogrammatidae), 23,24 and larval parasitoids have been reported on fall armyworm across Africa and Asia. 19 Among the larval parasitoids, Cotesia icipe Fernández-Triana & Fiaboe (Hymenoptera: Braconidae), a solitary koinobiont larval parasitoid of Spodoptera littoralis (Boisduval) and Spodoptera exigua (Hübner) (all Lepidoptera: Noctuidae), 25,26 has been found to be a promising parasitoid of S. frugiperda. 24,27,28 However, the cooccurrence and interaction between S. frugiperda and the stemborers (S. calamistis, B. fusca, C. partellus), as well other defoliators such as S. littoralis and Spodoptera exempta (Scott) (Lepidoptera: Noctuidae), which occupy the same agroecological zone or occur on the same host plant, 27,29,30 may have diverse implications for the efficiency of C. icipe as a biocontrol agent of S. frugiperda.…”

Section: Introductionmentioning

confidence: 99%

Old and new association of Cotesia icipe (Hymenoptera: Braconidae) with alien invasive and native Spodoptera species and key stemborer species: implication for their management

Obala,

Mohamed,

Magomere

et al. 2023

Pest Management Science

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BACKGROUNDMaize production in Africa is hindered by a myriad of biotic challenges, key among them being invasive and native lepidopteran stemborers. Recent invasion of the continent by fall armyworm, Spodoptera frugiperda, has further exacerbated the situation. Fortunately, Cotesia icipe was found to be very promising against S. frugiperda. However, the co‐occurrence and interaction between S. frugiperda and the stemborers (Busseola fusca, Sesamia calamistis, and Chilo partellus) in maize agroecosystem may jeopardize the efficiency of C. icipe as a biocontrol agent of S. frugiperda. This study investigated the performance of C. icipe on S. frugiperda, Spodoptera littoralis and the stemborers. Specifically, the preference and acceptability of C. icipe to the host insects, the physiological suitability of the hosts for its development, and the effect of these hosts on the fitness parameters of the offspring were assessed.RESULTSCotesia icipe accepted all the tested hosts, albeit with higher preference for Spodoptera species than for stemborers under multiple‐choice tests. Also, the highest parasitism of up to 97% was recorded on S. frugiperda compared with parasitism on the stemborers of 43% in B. fusca. Moreover, physiological suitability and fitness traits (except for per cent female offspring) varied with host species, again being optimal on Spodoptera species.CONCLUSIONCotesia icipe demonstrated strong potential to control S. frugiperda in maize due to its high affinity for parasitization and developmental success in this host; and despite its non‐specific parasitization, the presence of other hosts may not prevent its maximum control of S. frugiperda. © 2023 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

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Performance of the newly identified endoparasitoid Cotesia icipe Fernandez‐Triana & Fiaboe on Spodoptera littoralis (Boisduval)

Cited by 11 publications

References 41 publications

Parasitoid Complex of Fall Armyworm, Spodoptera frugiperda, in Ghana and Benin

Parasitoid Complex of Fall Armyworm, Spodoptera frugiperda, in Ghana and Benin

Acceptability and suitability of Spodoptera exigua (Hübner) for Cotesia icipe Fernandez‐Triana & Fiaboe on amaranth

Old and new association of Cotesia icipe (Hymenoptera: Braconidae) with alien invasive and native Spodoptera species and key stemborer species: implication for their management

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