Performance of the African edible bush-cricket, Ruspolia differens, on single and mixed diets containing inflorescences of their host plant species

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dc.contributor.authorMalinga, Geoffrey M.
dc.contributor.authorValtonen, Anu
dc.contributor.authorHiltunen, Minna
dc.contributor.authorLehtovaara, Vilma J.
dc.contributor.authorNyeko, Philip
dc.contributor.authorRoininen, Heikki
dc.date.accessioned2023-12-19T08:44:24Z
dc.date.available2023-12-19T08:44:24Z
dc.date.issued2020
dc.descriptionMalinga_insect_food_article_2020en_US
dc.description.abstractThe African edible bush-cricket, Ruspolia differens (Serville) (Orthoptera: Tettigoniidae), is an eco nomically valuable insect in sub-Saharan Africa. For its mass-rearing, suitable diets that can sustain its performance need to be identified. This study aimed at finding inflorescence diets of 10 host plant species and their mixtures that result in the highest R. differens production. We reared newly hatched nymphs to adults on inflorescences of single host species, and also on a gradient of five diversifying dietary mixtures consisting of one and mixtures of two, three, five, and seven host plant species. For the single host-plant diets, the developmental time was shortest on Pennisetum purpureum, Chloris gayana, and Brachiaria ruziziensis (approximately 63 days), whereas the fresh weight was highest on B. ruziziensis and P. purpureum (approximately 0.383 g). Survival was highest (>65%) on C. gayana, P. purpureum, B. ruziziensis, Setaria sphacelata, and Sporobolus pyramidalis, and lowest on Panicum maximum, Hyparrhenia rufa, Cynodon dactylon, and Paspalum scrobiculatum (<40%). With respect to diet mixtures, the developmental time was significantly shorter (on average 16 days shorter), and survival was higher, in the most diversified diets compared to the least diversified diets. The contents of polyunsaturated fatty acids and fatty acid composition did not differ significantly among the diets. However, the content of monounsaturated fatty acids differed significantly among the diets and there was a significant diet*sex interaction. From the applied point of view, based on our results, for maximal weight and survival plus fast development, we recommend rearing on P. purpureum, C. gayana, B. ruziziensis, and S. sphacelata, and on dietary mixtures of inflorescences. These findings are important in designing large-scale rearing programs for this species.en_US
dc.description.sponsorshipFunding for this work was provided by a grant from the Academy of Finland (grant # 14956 to HR)en_US
dc.identifier.citationMalinga, G. M., Valtonen, A., Hiltunen, M., Lehtovaara, V. J., Nyeko, P., & Roininen, H. (2020). Performance of the African edible bush‐cricket, Ruspolia differens, on single and mixed diets containing inflorescences of their host plant species. Entomologia Experimentalis et Applicata, 168(6-7), 448-459.en_US
dc.identifier.uriDOI: 10.1111/eea.12932
dc.identifier.urihttps://hdl.handle.net/20.500.14270/435
dc.language.isoenen_US
dc.publisherEntomologia experimentalis et applicata, special issue: insect productionen_US
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 United States*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/us/*
dc.subjectInsect developmental timeen_US
dc.subjectDiet mixingen_US
dc.subjectFatty acidsen_US
dc.subjectInsect farmingen_US
dc.subjectNseneneen_US
dc.subjectOrthopteraen_US
dc.subjectTettigoniidaeen_US
dc.subjectInflorescence dieten_US
dc.subjectRuspolia differensen_US
dc.subjectAfrican edible bush-cricketen_US
dc.titlePerformance of the African edible bush-cricket, Ruspolia differens, on single and mixed diets containing inflorescences of their host plant speciesen_US
dc.typeArticleen_US

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