Effects of Aqueous Extracts of Copaifera langsdorffii (Fabaceae) on the Growth and Reproduction of Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae)

Abstract

Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) is considered a pest of maize crops throughout the Western Hemisphere. We report on the effects of aqueous extracts of leaves and bark of Copaifera langsdorffii (Fabaceae) on the biology of S. frugiperda, as an alternative source of natural bioactive molecules for the sustainable management of this pest. Second instars were sprayed with aqueous extracts prepared with 5% (w/v) plant material and/or fed on an artificial diet containing extracts at a concentration equivalent to 0.25% (w/v) for 17 days. Both leaf and bark extracts of C. langsdorffii significantly reduced S. frugiperda food intake, feces, and larval weight and caused a delay in larval development. Additionally, C. langsdorffii-based extracts increased the oviposition period; induced morphological changes in the eggs, including deformation of the corium and malformation of the micropylar and aeropylar regions; and reduced egg viability. But, aqueous extracts of C. langsdorffii exhibited no negative effects on larval and pupal survival, duration of the pupal stage, survival of pupae, sex ratio, longevity, duration of pre-oviposition period, and female fecundity. Aqueous extracts of leaves and bark of C. langsdorffii are promising alternatives for the control of S. frugiperda in maize crops.

Bioatividade de extratos aquosos de Hedychium coronarium J. Koenig sobre Spodoptera frugiperda J. E. Smith, 1797, (Lepidoptera: Noctuidae)

“…A criação de S. frugiperda foi mantida em laboratório em câmara climatizada sob temperatura de 25±2C; UR de 70±10% e fotofase de 14 horas, conforme descrito por Sâmia et al (2016). A dieta que foi utilizada no bioensaio foi preparada de acordo com Greene et al (1976) e, após o resfriamento, foi moldada em cubos de 1cm 3 .…”

“…Um dos principais fatores que comprometem o rendimento e a qualidade da produção da cultura do milho é a incidência de insetos pragas. Dentre estes, destacam-se os insetos imaturos da ordem Lepidoptera, ou seja, as lagartas (BARROS, 2012), como a lagarta-docartucho, Spodoptera frugiperda, a lagarta-da-espiga, Helicoverpa zea e a broca-da-cana-deaçúcar, Diatraea saccharalis (SÂMIA et al 2016;MICHELOTTO et al, 2013).…”

Copaiba oil and Neem extract can be a potential alternative for the behavioral control of Sitophilus zeamais

“…(Fabaceae) is toxic against Aedes aegypti (L., 1762) (Diptera: Culicidae) and has an efficiency of 100% after two days of exposure (Mendonça et al, 2005). In the management of agricultural pests, the aqueous extract of the leaves and bark of C. langsdorffii harmed the larvae of Spodoptera frugiperda (J. E. Smith, 1797), causing a reduced food intake, decreased larval and pupal weight, increased larval stage, and reduced fertility (Sâmia et al, 2016).…”

Copaifera langsdorffii Novel Putative Long Non-Coding RNAs: Interspecies Conservation Analysis in Adaptive Response to Different Biomes

“…The copaíba oil resin has been shown to exert larvicidal activity against Aedes aegypti [12,13], and antibacterial activity in vitro [6,14,15,16]. The leaf extracts also presented leishmanicidal and antimalarial activities [17,18,19,20,21], also being effective as a biopesticide against lepidoptera [22].…”