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      CONTROLE QUÍMICO DE BONAGOTA SALUBRICOLA (MEYRICK, 1937) (LEPIDOPTERA: TORTRICIDAE) EM LABORATÓRIO E POMAR DE MACIEIRA Translated title: CHEMICAL CONTROL OF BONAGOTA SALUBRICOLA (MEYRICK, 1937) (LEPIDOPTERA: TORTRICIDAE) IN THE LABORATORY AND APPLE ORCHARD

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          Abstract

          RESUMO A lagarta-enroladeira Bonagota salubricola é considerada uma das principais pragas da macieira no Brasil. Para o controle do inseto, tem sido empregado o inseticida clorpirifós-etil, porém, o produto encontra restrições de uso, principalmente devido à toxicidade e a efeitos secundários sobre inimigos naturais. Com o objetivo de avaliar novos inseticidas que possam ser empregados no controle da lagarta-enroladeira, foram conduzidos experimentos de laboratório e em pomar comercial. Os inseticidas avaliados foram spinosad (Tracer 480 SC, 20 e 25 mL/100 L), metoxifenozide (Intrepid 240 SC, 40 e 60 mL/100 L), benzoato de emamectina (Proclaim 5 SG, 10 e 15 g/100 L) associado ao espalhante adesivo AgBem 250 mL/100 L e etofenproxi (Trebon 100 SC, 100 e 150 mL/100 L). Para comparação, foi utilizado o clorpirifós-etil (Lorsban 480 CE, 150 mL/100 L) e uma testemunha. Em laboratório, os inseticidas foram aplicados sobre posturas do inseto (com até 48 horas) e em folhas de maçãs, com posterior infestação de lagartas. Nenhum inseticida apresentou efeito sobre posturas da espécie. Os inseticidas benzoato de emamectina (0,5 e 0,75 g/100 L), clorpirifós-etil (75 g/100 L), metoxifenozide (14,4 g/100 L) e spinosad (12 g/100 L) provocaram mortalidade de lagartas superior a 90%, 96 horas após a aplicação. O etofenproxi não apresentou mortalidade significativa. Em pomar comercial, o dano nos frutos foi significativamente reduzido por todos os inseticidas, sendo que os produtos benzoato de emamectina (0,5 e 0,75 g/100 L) e metoxifenozide (14,4 g/100 L) apresentaram resultado equivalente ao inseticida clorpirifós-etil (75 g/100 L), reduzindo a porcentagem de frutos danificados em 85%. O inseticida spinosad (12 g/100 L) e o etofenproxi (10 e 15 g/100 L) reduziram os danos em 75,6 e 45%, respectivamente. Os inseticidas benzoato de emamectina e metoxifenozide são alternativas ao uso do clorpirifós-etil no controle da lagarta-enroladeira na cultura da macieira.

          Translated abstract

          ABSTRACT The Brazilian apple leafroller (BAL) Bonagota salubricola is one of the major apple pests in Brazil. For pest control, chlorpyriphosethyl is the principal compound used by growers, however its use entails environmental and health concerns. The objective of this work was to evaluate new insecticides for BAL control in laboratory and field experiments. Insecticides evaluated were spinosad (Tracer 480 SC, 20 and 25 mL/100L), methoxyfenozide (Intrepid 240 SC, 40 and 60 mL/100 L), emamectin benzoato (Proclaim 5 SG, 10 and 15 g/100 L) associated with the adjuvant AgBem, 250 mL/100 L, and etofenproxi (Trebon 100 SC, 100 and 150 m L/100 L). Chlorpyriphos-ethyl (Lorsban 480 CE, 150 mL/100 L) was used as a standard. In the laboratory, the insecticides were applied on egg masses (48 hours old) and apple leaves with posterior larvae infestation. No tested insecticide provided ovicidal effect. The insecticides emamectin benzoato (0.5 and 0.75 g/100 L), chlorpyriphos-ethyl (75 g/100 L), methoxyfenozide (14,4 g/100 L) and spinosad (12 g/100 L) caused larvae mortality above 90%, 96 hours after the application. Etofenproxi had reduced effects on larvae. In a commercial orchard, the damage in fruits was reduced for all treatments. The insecticides emamectin benzoato (0.5 and 0.75 g/100 L) and methoxyfenozide (14.4 g/100 L) were equivalent to chlorpyriphos-ethyl (75 g/100 L), reducing the damage by 85%. The insecticide spinosad (12 g/100L) and etofenproxi (10 and 15 g/100L) provided 75.6 and 45% reduction of fruit damage, respectively. The insecticides emamectin benzoato and methoxyfenozide are alternatives to chlorpyriphos-ethyl use for the control of BAL in apple orchards.

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          Most cited references24

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          A Method of Computing the Effectiveness of an Insecticide

          W. Abbott (1925)
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            The chemical and biological properties of methoxyfenozide, a new insecticidal ecdysteroid agonist.

            Methoxyfenozide [N-tert-butyl-N'-(3-methoxy-o-toluoyl)-3,5-xylohydrazide; RH-2485] is the newest diacylhydrazine insecticide to reach the marketplace. It binds with very high affinity to the ecdysone receptor complex (EcR:USP) in lepidopteran insects [Kd = 0.5 nM (Plodia)], where it functions as a potent agonist, or mimic, of the insect molting hormone, 20-hydroxyecdysone (20E). Methoxyfenozide exhibits high insecticidal efficacy against a wide range of important caterpillar pests, including many members of the family Pyralidae, Pieridae, Tortricidae and Noctuidae. It is most effective when ingested by the target caterpillar, but it also has some topical and ovicidal properties. It is modestly root systemic, but not significantly leaf-systemic. Evidence collected to date indicates that methoxyfenozide has an excellent margin of safety to non-target organisms, including a wide range of non-target and beneficial insects.
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              Biological Activity of the Spinosyns, New Fermentation Derived Insect Control Agents, on Tobacco Budworm (Lepidoptera: Noctuidae) Larvae

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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
                June 2009
                : 76
                : 2
                : 225-231
                Affiliations
                [03] Piracicaba São Paulo orgnameUniversidade de São Paulo Brazil
                [02] Vacaria RS orgnameIsca Tecnologias Brasil
                [01] Bento Gonçalves Rio Grande do Sul orgnameEmbrapa Uva e Vinho orgdiv1Centro Experimental Central Brazil
                Article
                S1808-16572009000200225 S1808-1657(09)07600200225
                10.1590/1808-1657v76p2252009
                c45d04a0-0bb7-43c9-8f7c-da3460367e5f

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

                History
                : 09 February 2009
                : 03 August 2007
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 24, Pages: 7
                Product

                SciELO Brazil

                Categories
                Artigo Científico

                injúria,Brazilian apple leafroller,Malus sp,injuries,Lagarta-enroladeira da maçã

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