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      Feeding preferences of the willow sawfl y Nematus oligospilus (Hymenoptera: Tenthredinidae) for commercial Salix clones Translated title: Preferencias alimentarias de la avispa sierra de los sauces Nematus oligospilus (Hymenoptera: Tenthredinidae) por clones de Salix comerciales

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          Abstract

          Nematus oligospilus Förster (Hymenoptera: Tenthredinidae) is a willow sawfly native to the Northern Hemisphere which became a serious defoliator in willow plantations (Salix spp.) of the Southern Hemisphere after being introduced in the early 1980´s. Studies on host preferences provide useful information for the development of pest management strategies where the willow sawfly may produce tree damage and economic loss. Feeding preferences of N. oligospilus larvae were evaluated in laboratory trials by simultaneously offering leaves from four willow tree clones commonly used in commercial plantations in Argentina (Salix babylonica var sacramenta Hortus, Salix nigra Marsch., S. babylonica L. x Salix alba L. 131-27 and Salix matsudana Koidz. x S. alba L. 13-44). Larvae of N. oligospilus fed on leaves from the four clones. However, insects consumed a significantly higher proportion of S. babylonica var sacramenta leaves than of leaves from the other clones. Results indicate that all clones used in the trials were palatable to the insect, and that S. babylonica var sacramenta is the preferred host for larval herbivory.

          Translated abstract

          Nematus oligospilus Förster (Hymenoptera: Tenthredinidae), o la avispa sierra de los sauces, es nativa del Hemisferio Norte y se ha convertido en un serio defoliador en plantaciones de sauces (Salix spp.) del Hemisferio Sur, después de su introducción a principios de 1980. Los estudios sobre las preferencias de hospedador aportan información útil para el desarrollo de estrategias, donde la avispa sierra puede producir daño a los árboles y pérdidas económicas. Se evaluó la preferencia alimentaria de las larvas de N. oligospilus, mediante ensayos de laboratorio; se ofrecieron en forma simultánea hojas de cuatro clones de sauce, usados comúnmente en plantaciones comerciales en Argentina (Salix babylonica var sacramenta Hortus, Salix nigra Marsch., S. babylonica L. x Salix alba L. 131-27 and Salix matsudana Koidz. x S. alba L. 13-44). Las larvas de N. oligospilus se alimentaron de las hojas de los cuatro clones. Sin embargo, consumieron una proporción significativamente mayor de las hojas de S. babylonica var sacramenta. Estos resultados indican que todos los clones utilizados en los ensayos fueron palatables para el insecto y que S. babylonica var sacramenta es el hospedador preferido para la herbivoría de las larvas.

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          Ecological Methodology

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            Host Selection and Larval Performance of Two Willow-Feeding Sawflies

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              Oviposition Preference and Larval Performance of Nematus oligospilus (Hymenoptera: Tenthredinidae) in Relation to Host Plant Vigor

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                Author and article information

                Journal
                rsea
                Revista de la Sociedad Entomológica Argentina
                Rev. Soc. Entomol. Argent.
                Sociedad Entomológica Argentina (La Plata, Mendoza, Argentina )
                0373-5680
                1851-7471
                June 2012
                : 71
                : 1-2
                : 145-150
                Affiliations
                [01] Ciudad Autónoma de Buenos Aires orgnameUniversidad de Buenos Aires orgdiv1Facultad de Ciencias Exactas y Naturales orgdiv2Departamento de Ecología, Genética y Evolución Argentina
                Article
                S0373-56802012000100014 S0373-5680(12)07100100014
                59426750-1410-4d43-b78f-c1145bca3246

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 10 May 2012
                : 27 January 2012
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 27, Pages: 6
                Product

                SciELO Argentina


                Defoliación,Salicaceae,Defoliation,Herbivory,Willow sawfly,Herbivoría,Avispa sierra

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