Journal ArticleDOI
The feeding behavior of the weevil, Exophthalmus jekelianus, with respect to the nutrients and allelochemicals in host plant leaves
TLDR
The model is shown to provide an effective framework for understanding the complex interactions among the chemical constituents of plants in a living host plant and predicts the phagostimulatory power of foods in the context of the regulation of multiple nutrients.Abstract:
The aim of this study was to relate nutritional and allelochemical variables in a living host plant to the feeding behavior of herbivorous insects in a field setting. We chose to study the foraging behavior of individual folivorous weevils (Exophthalmus jekelianus) while they were feeding on Central American mahogany (Cedrela odorata) in plantation in Costa Rica. All leaves contacted by the weevils during each observation were subjected to chemical analysis, and the weevils’ choice of leaves and their meal durations on those leaves were examined with respect to leaf chemical composition. Leaves that contained limonoids (allelochemicals present in the leaves) had fewer meals taken on them than did leaves without limonoids. Regression analysis and factor analysis were employed to investigate associations between leaf chemistry and meal duration. Univariate regressions indicated significant associations between meal duration and sucrose concentration, and between meal duration and nitrogen concentration. Factor analysis indicated that soluble sugars, nitrogen and limonoids were important variables that accounted for variation in meal duration. Sucrose and nitrogen concentrations were incorporated into a mathematical model that predicts the phagostimulatory power of foods in the context of the regulation of multiple nutrients. The model is shown to provide an effective framework for understanding the complex interactions among the chemical constituents of plants inread more
Citations
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Journal ArticleDOI
Responses of tree and insect herbivores to elevated nitrogen inputs: A meta-analysis
TL;DR: Elevated N inputs would provide more food sources and ameliorate tree palatability for insects, while the resistance of trees against their insect herbivores was weakened, especially for broadleaves, and global forest insect pest problems would be aggravated by elevated N inputs.
Journal ArticleDOI
Induced defenses change the chemical composition of pine seedlings and influence meal properties of the pine weevil Hylobius abietis.
TL;DR: A mechanism by which methyl jasmonate treatment may protect conifer seedlings against pine weevils is suggested.
Journal ArticleDOI
Phylogenetic reassessment of the Exophthalmus genus complex (Curculionidae: Entiminae: Eustylini, Geonemini)
TL;DR: The monophyly of the Neotropical entimine weevil genus Exophthalmus Schoenherr, 1823, is reassessed and historical biographic factors, including colonization via temporary continental Neotropics-to-Caribbean land connections, were important in the evolution of major eustyline lineages.
Journal ArticleDOI
Plant secondary substances and insects behaviour
TL;DR: Some herbivorous insects are synthesising the aggregation, attracting, alarm or mating pheromone from the allelochemicals in their host plants as protection against natural enemies.
Journal ArticleDOI
Black soldier flies ( Hermetia illucens Linnaeus) as recyclers of organic waste and possible livestock feed
Paulin Nana,Janaina M. Kimpara,Christian Keambou Tiambo,Claudine Tekounegning Tiogué,Jislaire Youmbi,Boniface Choundong,Théophile Fonkou +6 more
TL;DR: In this article, the feasibility of feeding Hermetia illucens Linnaeus larvae to digest and degrade organic waste in a small-scale was evaluated in low and middle-income countries.
References
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Book
Applied Multivariate Statistical Analysis
R. A. Johnson,Dean W. Wichern +1 more
TL;DR: In this article, the authors present an overview of the basic concepts of multivariate analysis, including matrix algebra and random vectors, as well as a strategy for analyzing multivariate models.
Journal ArticleDOI
Applied Multivariate Statistical Analysis.
TL;DR: In this article, the authors present an overview of the basic concepts of multivariate analysis, including matrix algebra and random vectors, as well as a strategy for analyzing multivariate models.
Book
Nonparametric Statistical Methods
Myles Hollander,Douglas A. Wolfe +1 more
TL;DR: An ideal text for an upper-level undergraduate or first-year graduate course, Nonparametric Statistical Methods, Second Edition is also an invaluable source for professionals who want to keep abreast of the latest developments within this dynamic branch of modern statistics.