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      SUSCETIBILIDADE DA BROCA-DA-ERVA-MATE HEDYPATHES BETULINUS (KLUG, 1825) (COLEOPTERA: CERAMBYCIDAE) AO NEMATÓIDE STEINERNEMA CARPOCAPSAE (NEMATODA, STEINERNEMATIDAE) Translated title: SUSCEPTIBILITY OF HEDYPATHES BETULINUS (KLUG, 1825) (COLEOPTERA: CERAMBYCIDAE) TO THE ENTOMOPATHOGENIC NEMATODE STEINERNEMA CARPOCAPSAE (NEMATODA, STEINERNEMATIDAE)

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          Abstract

          RESUMO A broca-da-erva-mate, Hedypathes betulinus (Klug, 1825) (Coleoptera: Cerambycidae), é uma das principais pragas dessa cultura. Seu controle é dificultado devido aos hábitos crípticos das larvas, sendo a catação dos insetos adultos o método usado pelos produtores para diminuir a infestação. Este trabalho teve como objetivo avaliar pela primeira vez a suscetibilidade de H. betulinus ao nematoide entomopatogênico Steinernema carpocapsae , em condições de laboratório, visando futura utilização no controle da praga. O nematoide foi aplicado em quatro diferentes concentrações (12,5; 25; 50 e 100 Juvenis Infectantes/cm2), contra adultos. O inseto mostrou-se susceptível em todas as concentrações testadas, obtendo-se mortalidade de 35 a 78% para a menor e maior concentrações, respectivamente.

          Translated abstract

          ABSTRACT Hedypathes betulinus (Klug, 1825) (Coleoptera: Cerambycidae) is the main pest of Paraguay tea. Its control is difficult, due to the cryptic habit of the larvae. Usually it is controlled by catching the adults. This work aimed for the first time to evaluate a new control method for this pest, testing the susceptibility of H. betulinus to the entomopathogenic nematode Steinernema carpocapsae in the laboratory. The nematode was applied in 4 doses (12.5; 25; 50 and 100 infective juveniles/cm2), against adult insects. The nematode caused mortality of 35% and 76% at the smallest and largest concentrations, respectively.

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          Most cited references23

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          Behavioral ecology of entomopathogenic nematodes

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            Entomopathogenic nematode host finding: response to host contact cues by cruise and ambush foragers

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              Susceptibility of lady beetles (Coleoptera: Coccinellidae) to entomopathogenic nematodes.

              We investigated differential susceptibility of lady beetles to entomopathogenic nematodes, for two reasons: (1) to estimate potential nontarget effects on natural lady beetle populations, (2) to compare the susceptibility of exotic versus native lady beetle species. We hypothesize that successful establishment of some exotically introduced arthropods may be due, in part, to a lower susceptibility relative to competing native species. In laboratory studies, we compared the pathogenicity, virulence, and reproductive capacity of Heterorhabditis bacteriophora and Steinernema carpocapsae among two native (Coleomegilla maculata and Olla v-nigrum) and two successfully established exotic (Harmonia axyridis and Coccinella septempunctata) lady beetles, and a known susceptible lepidopteran host, Agrotis ipsilon. After 1 and 2 days of exposure to either nematode species, mortality of A. ipsilon was higher than in all lady beetles. Thus, we predict that nematode field applications would have significantly less impact on lady beetle populations than on a susceptible target pest. Additionally, the impact of soil-applied nematodes may be lower on lady beetles than on soil-dwelling hosts because the former spends relatively less time on the soil. Exotic lady beetles were less susceptible to nematode infection than native species. Reproductive capacity data also indicated lower host suitability in H. axyridis, but not in C. septempunctata. Overall, the hypothesis that low susceptibility to pathogens in certain exotic lady beetles may have contributed to competitive establishment was supported (especially for H. axyridis). Additional studies incorporating different hosts and pathogens from various geographic locations will be required to further address the hypothesis.
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                Author and article information

                Journal
                aib
                Arquivos do Instituto Biológico
                Arq. Inst. Biol.
                Instituto Biológico (São Paulo, SP, Brazil )
                0020-3653
                1808-1657
                September 2009
                : 76
                : 3
                : 479-482
                Affiliations
                [03] Cascavel Paraná orgnameUniversidade Estadual do Oeste do Paraná Brazil
                [01] Cornélio Procópio PR orgnameUniversidade Estadual do Norte Paranaense Brasil
                [02] Campinas SP orgnameInstituto Biológico orgdiv1Centro Experimental Central Brasil
                Article
                S1808-16572009000300479 S1808-1657(09)07600300479
                10.1590/1808-1657v76p4792009
                9bc71b54-2ea0-4123-8e67-0215a679e6f8

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

                History
                : 18 May 2008
                : 18 May 2009
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 31, Pages: 4
                Product

                SciELO Brazil

                Categories
                Comunicação Científica

                Controle biológico,nematoides entomopatogênicos,Biological control,entomopathogenic nematodes

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