Chemical composition and acaricidal activity of essential oils from Peperomia pellucida Kunth. against Tetranychus urticae

The compositions of the essential oils from unripe (UFr) and ripe (RFr) fruits of Schnus terebinthifolius were analyzed by GC and GC/MS. The major compound identified in both oils was limonene (UFr = 44.1 ± 1.3%; RFr = 31.8 ± 1.2%), followed by α-phellandrene (15.7 ± 0.4%) in the UFr oil and thujene (21.7 ± 0.9%) in the RFr oil. Repellent and toxicity activities of the two oils were also evaluated, and the results compared with eugenol. The UFr oil was more active in the fumigation tests (LC50 = 1.46 μL/L of air), whereas the RFr oil was more active in the sealed dishes (SD) than open dishes (OD) contact assay (LC50 = 3.04 μL/cm2) and not significantly different from eugenol. Both oils exhibited significant repellent activity comparable with that of eugenol. The results suggest that the repellent activity of these oils in association with its toxicity could be a great advantage for the integrated management of T. urticae.

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Acaricidal activity of binary blends of essential oils and selected constituents against Tetranychus urticae in laboratory/greenhouse experiments and the impact on Neoseiulus californicus

Experimental and Applied Acarology ◽

10.1007/s10493-020-00464-8 ◽

2020 ◽

Vol 80 (3) ◽

pp. 423-444

Author(s):

Mário Jorge Cerqueira de Araújo ◽

Cláudio Augusto Gomes da Câmara ◽

Flávia de Souza Born ◽

Marcilio Martins de Moraes

Keyword(s):

Essential Oils ◽

Tetranychus Urticae ◽

Acaricidal Activity ◽

Neoseiulus Californicus ◽

Binary Blends ◽

Greenhouse Experiments ◽

The Impact

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Chemical composition and acaricidal activity of the leaf and fruit essential oils of Protium heptaphyllum (Aubl.) Marchand (Burseraceae)

Acta Amazonica ◽

10.1590/s0044-59672007000100012 ◽

2007 ◽

Vol 37 (1) ◽

pp. 103-109 ◽

Cited By ~ 21

Author(s):

Wendel José Teles Pontes ◽

José Cândido Guerra de Oliveira ◽

Cláudio Augusto Gomes da Câmara ◽

Adelmo C. H. R. Lopes ◽

Manoel Guedes Correia Gondim Júnior ◽

...

Keyword(s):

Chemical Composition ◽

Essential Oils ◽

Spider Mite ◽

Acaricidal Activity ◽

Major Constituent ◽

Repellent Effect ◽

Oviposition Deterrence ◽

Leaf Oil ◽

Two Spotted Spider Mite ◽

Fruit Oil

Essential oils from leaves and fruits of Protiumheptaphyllum collected in Tamandaré beach Pernambuco/Brazil were analysed by GC/MS and tested for toxicity and repellent effect against the two spotted spider mite (Tetranychus urticae). The major constituent identified in the fruits was alpha-terpinene (47.6 %) whereas oil from leaf contained mainly sesquiterpenes such as 9-epi-caryophyllene (21.4 %), trans-isolongifolanone (10.7 %) and 14-hydroxi-9-epi-caryophyllene (16.7 %). The fruit oil was found to be more effective against the mite when compared to the leaf oil. Both showed mortality properties and oviposition deterrence in higher concentration (10 µl.l-1 air), but only the essential oil from fruits induced repellence on T. urticae.

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