Essential oils activity from plants of the Brazilian Caatinga on the vegetable leafminer

Tiago Cardoso Costa-Lima,Andréa Costa Oliveira,Rita de Cássia Rodrigues Gonçalves-Gervásio,Ana Valéria Vieira Souza

doi:10.1590/1983-40632020v5058313

Tiago Cardoso Costa-Lima, Andréa Costa Oliveira + Show 2 more

Open Access

https://doi.org/10.1590/1983-40632020v5058313

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Abstract

ABSTRACT Liriomyza sativae (Blanchard) is a worldwide polyphagous pest for horticultural and ornamental crops, whose chemical control is the major method adopted. However, botanical insecticides in the form of essential oils (EOs) are presented as promising alternatives. This study aimed to evaluate the effect of EOs from the species Croton sonderianus Muell. Arg., Croton conduplicatus Kunth., Lippia gracilis Schauer and Lippia schaueriana Mart. on the biological aspects of L. sativae adults and immature stages (larva and pupa). The results showed larval and pupal mortality after the immersion of leaves with newly hatched L. sativae larvae in EOs solution from L. gracilis and L. schaueriana leaves. The EOs from C. conduplicatus stem bark and leaf and from C. sonderianus stem bark extended the leafminer pupal stage duration, while those from C. conduplicatus leaves and C. sonderianus stem bark decreased the oviposition and feeding punctures in no-choice tests. Only C. conduplicatus confirmed the effect in the free-choice test, showing to be the most promising in the study. This way, EOs from L. gracilis and L. schaueriana leaves show an insecticide activity on L. sativae larvae, and those from C. conduplicatus leaves reduce the leafminer oviposition and feeding punctures in melon plants.

Highlights

The leafminer Liriomyza sativae Blanchard (Diptera: Agromyzidae) is a polyphagous pest of vegetables and ornamental plants, originally from the Americas; it is currently a global pest present in Africa, Europe, Asia and Oceania (CABI 2018).The major damage is caused by its larvae, which feed internally in the leaves, forming galleries.there is a leaf area damage and, a photosynthetic activity reduction, resulting in a lower yield and fruit quality (Costa et al 2017).Chemical control is the major method adopted by producers; insecticide-resistant populations have been reported (Ferguson 2004, Wei 2015)
The identification of compounds present in the essential oils (EOs) samples used in this study was previously published for the following species: C. sonderianus leaves (Souza et al 2017a), C. conduplicatus leaves (Almeida et al 2014) and stem barks (Oliveira et al 2017), L. gracilis leaves (Souza et al 2017b) and L. schaueriana leaves (Souza et al 2018)
The EOs chemical composition was determined by gas-phase chromatography coupled to mass spectrometer (GCMS), in a Shimadzu chromatograph GC-2010 Plus, GCMS-QP2010 Ultra equipped with an automatic sampler AOC model-20i (Souza et al 2017a) and by gas chromatography coupled to a flame ionization detector (GC-DIC), in a gas chromatograph Varian® CP-3380 equipped with DIC

Summary

Introduction

The leafminer Liriomyza sativae Blanchard (Diptera: Agromyzidae) is a polyphagous pest of vegetables and ornamental plants, originally from the Americas; it is currently a global pest present in Africa, Europe, Asia and Oceania (CABI 2018).The major damage is caused by its larvae, which feed internally in the leaves, forming galleries.there is a leaf area damage and, a photosynthetic activity reduction, resulting in a lower yield and fruit quality (Costa et al 2017).Chemical control is the major method adopted by producers; insecticide-resistant populations have been reported (Ferguson 2004, Wei 2015). The leafminer Liriomyza sativae Blanchard (Diptera: Agromyzidae) is a polyphagous pest of vegetables and ornamental plants, originally from the Americas; it is currently a global pest present in Africa, Europe, Asia and Oceania (CABI 2018). The major damage is caused by its larvae, which feed internally in the leaves, forming galleries. There is a leaf area damage and, a photosynthetic activity reduction, resulting in a lower yield and fruit quality (Costa et al 2017). Chemical control is the major method adopted by producers; insecticide-resistant populations have been reported (Ferguson 2004, Wei 2015). Parasitoids are the major natural enemies of leafminers (Connor & Taverner 1997), and several studies have shown the insecticides impact on these species (Matsuda & Saito 2014, Guantai et al 2015).

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