Towards new botanical pesticides: the toxic effect of Eremanthus goyazensis (Asteraceae) leaves essential oil against Brevipalpus phoenicis (Acari: Tenuipalpidae)

Abstract

Recebido em 26/4/12; aceito em 24/8/12; publicado na web em 25/9/12 This work reports the chemical characterization of Eremanthus goyzensis essential oil and its toxic effect over Brevipalpus phoenicis. The essential oil displayed a major composition of sesquiterpenes (61.87%) including trans-caryophillene (26.81%) and germacrene-D (13.31%). The fumigation test indicated a promising bioactivity over adult B. phoenicis individuals at 24 h (2.03 μL/L of air) and 48 h (1.08 μL/L of air) of exposition. A brief discussion of essential oils composition and their singular role on the toxic effect over B. phoenicis is provided here. Our results may contribute to a new and profitable use of a species of Brazilian flora on agribusiness.

Genomes of trombidid mites reveal novel predicted allergens and laterally transferred genes associated with secondary metabolism

“…Germacrene has also been implicated as an arthropod repellent among complex sesquiterpene mixtures found in the essential oils of various plants, which have been shown to be effective against several acarines, including the ticks Rhipicephalus microplus and Ixodes ricinus [ 159 , 160 ] and the poultry red mite Dermanyssus gallinae [ 160 ]. Although it has not been assayed in isolation, germacrene is additionally a significant component of essential oils or crude leaf extracts that exhibit toxic effects against phytophagous mites ( Brevipalpus phoenicis in the Trombidiformes [ 161 ]) and ants ( Solenopsis invicta [ 162 ]).…”

Histolocalization of chemotaxonomic markers in Brazilian Vernonieae (Asteraceae)

“…It is well know that Lychnophorinae produce metabolites of therapeutic importance, such as terpenoids (mono‐, sesqui‐, di‐ and triterpenes and sesquiterpene lactones) and phenolic compounds (flavonoids and cinnamic acid derivatives) (Vichnewski & Gilbert, ; Vichnewski et al ., ; Herz et al ., ; Dias Barros et al ., ; Oliveira et al ., ; Grael et al ., ; Dos Santos et al ., ; Kanashiro et al ., ; Taleb‐Contini et al ., ; Silvério et al ., ; Keles et al ., ; Dos Santos et al ., ; Baldin et al ., ; De Souza et al ., ; Abreu et al ., ; Silvério et al ., ; Gouvea et al ., ; Saúde‐Guimarães, Raslan & Oliveira, ). In addition, many studies have investigated the chemotaxonomy of Lychnophorinae because of the chemical richness that characterizes the subtribe (Bohlmann et al ., , b; Herz et al ., ; Bohlmann et al ., ; Zdero et al ., ; Bohlmann et al ., ; Bohlmann & Jakupovic, ; Borella et al ., ; Lunardello et al ., ; Borella et al ., ; Vichnewski et al ., ; Sacilotto, Sartori & Vichnewski, ; Sartori et al ., ; Sakamoto et al ., , ; Keles et al ., ; Sakamoto et al ., ; Souza et al ., ; Lusa et al ., ).…”

Genomes of trombidid mites reveal novel predicted allergens and laterally-transferred genes associated with secondary metabolism

“…Germacrene has also been implicated as an arthropod repellent amongst complex sesquiterpene mixtures found in the essential oils of various plants, which have been shown to be effective against several acarines, including the ticks Rhipicephalus microplus and Ixodes ricinus [147, 148], and the poultry red mite Dermanyssus gallinae [148]. Although it has not been assayed in isolation, germacrene is additionally a significant component of essential oils or crude leaf extracts that exhibit toxic effects against phytophagous mites ( Brevipalpus phoenicis in the Trombidiformes [149]) and ants ( Solenopsis invicta [150]).…”