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      Relação predador: presa de Chrysoperla externa (Hagen) (Neuroptera: Chrysopidae) para o controle do pulgão-verde em genótipos de sorgo Translated title: Predator: prey ratios of Chrysoperla externa (Hagen) (Neuroptera: Chrysopidae) for the control of greenbug in sorghum genotypes

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          Abstract

          O uso da resistência de plantas associado a agentes de controle biológico pode ser uma alternativa viável no controle de Schizaphis graminum (Rondani) em sorgo. Objetivou-se estudar diferentes relações predador:presa em genótipos de sorgo resistente (TX 430 x GR 111), moderadamente resistente (GB 3B) e suscetível (BR 007B) para o controle do pulgão-verde por Chrysoperla externa (Hagen). Para isso foram realizadas, em condições de casa-de-vegetação, liberações do crisopídeo nas relações predador:presa de 1:5; 1:10; 1:25 e 1:50. O genótipo TX 430 x GR 111 foi o mais eficiente no controle do pulgão-verde, S. graminum, assim como as relações predador:presa de 1:5 e de 1:10 nos três genótipos. A interação resistência de plantas e controle biológico foi positiva e permitiu controle acima de 80% nas relações predador:presa de 1:5 e 1:10 no material resistente TX 430 x GR 111; no genótipo GB 3B o melhor controle foi obtido com 1 predador: 5 presas.

          Translated abstract

          The use of host plant resistance associated with biocontrol agents may be a viable alternative to Schizaphis graminum (Rondani) control in sorghum. This work aimed to study different predator:prey ratios on genotype resistant (TX 430 x GR 111), moderately resistant (GB 3B) and susceptible (BR 007B) for the aphid control by the predator Chrysoperla externa (Hagen). Thus, the lacewings were released at the predator:prey ratios of 1:5; 1:10; 1:25 and 1:50 under greenhouse conditions. The genotype TX x GR 111 was the most efficient to control S. graminum, as well the 1:5 and 1:10 predator: prey ratios on the three genotypes. The interaction between plant resistance and biological control with C. externa was positive and permitted a control over 80% at the predator:prey ratios of 1:5 and 1:10; on the GB 3B genotype the best control was at the 1:5 predator:prey ratio.

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          Ecologia Nutricional de Insetos e suas Implicações no Manejo de Pragas

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            RELEASE OF CHRYSOPERLA CARNEA STEPHENS (NEUROPTERA: CHRYSOPIDAE) FOR CONTROL OF THE GREEN APPLE APHID, APHIS POMI DEGEER (HOMOPTERA: APHIDIDAE)

            Release of the chrysopid, Chrysoperla cornea Stephens, at a rate of ca. 335 000 eggs per hectare, reduced significantly the numbers of apterous adults and nymphs of the green apple aphid, Aphis pomi DeGeer, on dwarf apple trees. Greater reduction in aphid numbers occurred in 1984 than in 1985, and the efficiency of the predator might have been influenced by the predator:prey ratios (1:10 and 1:19) used and by the mean daily temperature that occurred during the test periods. Application of azinphosmethyl (Guthion 50% wp, 0.105 and 0.075 kg AI/100 L) did not adversely affect predation of apterous A . pomi by larvae of C . carnea . Résumé Le lâcher du chrysopidé, Chrysoperla carnea Stephens, à raison d’environ 335 000 oeufs par hectare, réduit significativement le nombre d’adultes aptères et de nymphes du puceron vert du pommier, Aphis pomi DeGeer, sur les pommiers nains. On a assisté à une réduction plus marquée du nombre de pucerons en 1984 qu’en 1985, les rapports prédateur : proie (1 : 10 et 1 : 19) utilisés et la température quotidienne moyenne qui a régné au cours des périodes d’essai ayant peut-être influé sur l’efficience du prédateur. L’application d’azinphos-méthyl (Guthion 50% PM, à raison de 0,105 et de 0,075 kg m.a./100 L) ne nuit pas à la prédation des formes aptères de A . pomi par les larves de C . carnea .
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              Controle biológico de Spodoptera frugiperda utilizando o parasitóide de ovos Trichogramma

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Journal
                ne
                Neotropical Entomology
                Neotrop. entomol.
                Sociedade Entomológica do Brasil (Londrina )
                1678-8052
                August 2004
                : 33
                : 4
                : 447-450
                Affiliations
                [1 ] Universidade Estadual Paulista Brazil
                Article
                S1519-566X2004000400008
                10.1590/S1519-566X2004000400008
                9e8ecaa4-e146-46d2-83fc-3eee9fde63c4

                http://creativecommons.org/licenses/by/4.0/

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                Product

                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=1519-566X&lng=en
                Categories
                ENTOMOLOGY

                Entomology
                Insecta,integrated control,host plant resistance,Schizaphis graminum,controle integrado,resistência de plantas

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