Cinnamomum camphora var. linaloolifera essential oil on pest control: Its effect on Trialeurodes vaporariorum (Hemiptera: Aleyrodidae)

Camila Bonatto Vicenço,Wendel Paulo Silvestre,Gabriel Fernandes Pauletti,Neiva Monteiro De Barros,Joséli Schwambach

doi:10.33448/rsd-v10i7.16216

Camila Bonatto Vicenço, Wendel Paulo Silvestre + Show 3 more

Open Access

https://doi.org/10.33448/rsd-v10i7.16216

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Abstract

This study evaluated the insecticidal effect of Cinnamomum camphora var. linaloolifera essential oil and its major compound, linalool, on Trialeurodes vaporariorum. Essential oil treatments were applied at 0.5, 1.0, 1.5, and 2.0% v/v on eggs, nymphs, and adult individuals and linalool equivalent concentrations on nymphs of T. vaporariorum. The negative controls water and Tween-80® (0.5% v/v) and a positive control (spiromesifen 0.05% v/v for eggs and nymphs; pymetrozine 0.04% m/v for adults) were also used. The essential oil of C. camphora at 2.0% v/v caused egg mortality of 49.7%; same concentration caused the highest nymph mortality (88.5%). For adults, the essential oil at 2.0% v/v caused the highest mortality (40.0%) after 48 h, not changing from 48 to 72 h. The essential oil and linalool performed similarly relative to the nymphs, whose mortalities have not differed statistically, with exception of the concentrations of 0.5 and 1.0% v/v. Regarding the chemical control, the concentration of 2.0% v/v has had similar mortality for nymphs; for eggs and adults, the essential oil caused lower mortality (49.4 and 40.0%) than the synthetic pesticide (65.0 and 72.0%). The essential oil of C. camphora may be a potential control alternative for T. vaporariorum, especially regarding the Integrated Pest Management (IPM) practices.

Highlights

Trialeurodes vaporariorum (Westwood, 1856) is considered the main pest in ornamental and vegetables in protected cultivations (Lourenção et al, 2008)
2.2 Plant material for essential oil extraction The plant material of Cinnamomum camphora var. linaloolifera was collected in the Institute of Biotechnology of UCS
3.1 Essential oil composition and yield The essential oil obtained from the dried leaves of C. camphora has had a yield of 1.60% v/w

Summary

Introduction

Trialeurodes vaporariorum (Westwood, 1856) is considered the main pest in ornamental and vegetables in protected cultivations (Lourenção et al, 2008). The honeydew covers fruits and leaves and serves as food to a saprophyte fungus, rendering the plant surface blackish and sticky (Perring et al 2018). This indirect damage fosters the development of a fungus (Capnodium sp.), which harms the leaves’ physiological processes, causing them to wilt and fall, hastening the development cycle of the cultivation (Barbosa et al, 2002). T. vaporariorum may act as a vector in transmitting viral diseases, which causes severe damage and production loss in several kinds of vegetables (Capinera, 2008)

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