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1. CARACTERIZAÇÃO E ATIVIDADE INSETICIDA DO ÓLEO ESSENCIAL DE Zingiber officinale ROSCOE - ZINGIBERACEAE SOBRE Duponchelia fovealis ZELLER, 1847 (LEPIDOPTERA: CRAMBIDAE).

Author

Oliveira Ataide, Julielson, Pratissoli, Dirceu, Ferreira Melo Fragoso, Débora, and Fontes Pinheiro, Patricia

Subjects
*INSECT eggs, *GINGER, *CRAMBIDAE, *INSECT mortality, *CATERPILLARS, *ESSENTIAL oils
Abstract

The activity of ginger essential oil, Zingiber officinale Roscoe - Zingiberaceae, on eggs and caterpillars of Duponchelia fovealis Zeller, 1847 (Lepidoptera: Crambidae) was evaluated. Oil was produced by hydrodistillation with Clevenger and was characterized by (CG-DIC and CG-EM). For biological tests, an aerograph was employed for spraying a solution of essential oil at 2% concentration (m/v-1) on insects and the effect of eggs by immersion was evaluated. Solvent used for the preparation of solutions of essential oils consisted of water solution with 0.05% (m/v-1) Tween 80 and 2% (m/v-1) acetone and negative control, insecticide Clorfenapir as positive control. Main compounds in ginger essential oil were a-zingiberene (17.21%), geranial (16.46%), camphene (10.19%). Estimated rates for lethal concentrations (CL50 and CL90) for eggs were 0.25 and 0.54% respectively, and 0.61 and 1.35% for first stage caterpillars, respectively. The above proved potential of ginger essential oil on insect mortality. [ABSTRACT FROM AUTHOR]

Published
2020
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2. Trichogramma galloi e Trichogramma pretiosum para o manejo de Duponchelia fovealis (Lepidoptera: Crambidae) em morangueiro

Author

Victor Dias Pirovani, José Romário de Carvalho, Luana Viana Faria, Dirceu Pratissoli, Marcel Oliveira Tiburcio, and Alixelhe Pacheco Damascena

Subjects
0106 biological sciences, Agriculture (General), Fragaria x ananassa, biological control, Biology, 01 natural sciences, S1-972, 010602 entomology, Horticulture, strawberry caterpillar, lagarta do morangueiro, Animal Science and Zoology, Agronomy and Crop Science, controle biológico, 010606 plant biology & botany
Abstract

The objective of this work was to determine the ideal number for field release of Trichogramma galloi and T.pretiosum for controlling Duponchelia fovealis (Lepidoptera: Crambidae) in strawberry (Fragaria x ananassa). The experiment was carried out in a greenhouse, where the strawberry cultivar 'Oso Grande' was infected with 100 eggs of D.fovealis distributed on the leaf surface area of each plant. A total of 1, 2, 4, 8, 16, 32, 64, and 128 female parasitoids were released per egg of D. fovealis. The greatest level of egg parasitism, with no differences for the species of Trichogramma, was observed at the densities of four and eight parasitoids per egg of D.fovealis, considered ideal for field release. Resumo: O objetivo deste trabalho foi estimar o número ideal de Trichogramma galloi e T.pretiosum para liberação em campo, para o manejo de Duponchelia fovealis (Lepidoptera: Crambidae) em morangueiro (Fragaria x ananassa). O experimento foi implantado em casa de vegetação, onde morangueiros da cultivar 'Oso Grande' foram infestados com 100 ovos de D.fovealis distribuídos na área foliar de cada planta. Foram liberadas 1, 2, 4, 8, 16, 32, 64 e 128 fêmeas parasitoides por ovo de D.fovealis. O maior nível de parasitismo, sem diferenças entre as espécies de Trichogramma, foi observado às densidades de quatro e oito parasitoides por ovo de D.fovealis, consideradas ideais para liberação em campo.

Published
2017

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