Nematicidal activity of plant essential oils and components from garlic (Allium sativum) and cinnamon (Cinnamomum verum) oils against the pine wood nematode (Bursaphelenchus xylophilus)

Abstract

Plant essential oils from 43 plant species were tested for their nematicidal activities against the pine wood nematode, Bursaphelenchus xylophilus. Responses varied with plant material and concentration. Good nematicidal activity against male, female and juvenile nematodes of B. xylophilus was achieved with essential oils of Cinnamomum verum, Leptospermum petersonii, Asiasarum sieboldi, Boswellia carterii, Pimenta racemosa, Cymbopogon citratus, Mentha spicata, clove and garlic. Garlic and cinnamon oils showed the most potent nematicidal activity among the plant essential oils. Analysis by gas chromatography-mass spectrometry led to identification of three major compounds from garlic and two from cinnamon oil. These five compounds from two essential oils were tested individually for their nematicidal activities against the pine wood nematode. Responses varied with compounds and dose. LC50 values of diallyl trisulphide, diallyl disulphide and cinnamyl acetate against juvenile nematode were 2.79, 37.06 and 32.81 μl−1, respectively. The essential oils described herein merit further study as potential nematicides against the pine wood nematode.

Bioactivity against Bursaphelenchus xylophilus: Nematotoxics from essential oils, essential oils fractions and decoction waters

“…Eucalyptus citriodora EO showed weak activity against the PWN in a previous study (Park et al, 2005). Nevertheless, the fact that Park et al (2005) do not detail this EO composition does not allow a direct comparison between studies.…”

“…Nevertheless, the fact that Park et al (2005) do not detail this EO composition does not allow a direct comparison between studies.…”

Antifungal activity of Myrtaceae essential oils and their components against three phytopathogenic fungi

“…Many plant essential oils belonging to Myrtaceae species have been reported to have diverse bioactivity, such as insecticidal, antifungal and nematicidal activity. [7][8][9] In this study, we assessed the fungicidal activity of 11 Myrtaceae plant essential oils and their components against three phytopathogenic fungi to find new types of disease control alternatives.…”

Fumigant antifungal activity of plant essential oils and components from West Indian bay (Pimenta racemosa) and thyme (Thymus vulgaris) oils against two phytopathogenic fungi

“…3 Many essential oils and their constituents have been reported to exhibit antifungal, insecticidal and nematicidal activities. [4][5][6] Thyme is a 10 -30 cm tall aromatic plant native to the Mediterranean region. It is commonly sold fresh, ground, dried or as an essential oil.…”