Herbicide effects of essential oils

Tworkoski, Thomas

doi:10.1614/0043-1745(2002)050[0425:heoeo]2.0.co;2

Cited by 266 publications

(185 citation statements)

References 13 publications

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“…In addition, the volatile oil has also been implicated in allelopathic interactions suppressing the germination and growth of other plants (Lorber and Muller, 1976;Kohli, 1990;Angelini et al, 2003;Barney et al, 2005). This property of essential oils is being exploited for their use as bioherbicide (Dudai et al, 1999;Tworkoski, 2002;Singh et al, 2005). Moreover, these are generally regarded as safer compounds because of their biodegradable nature (Isman, 2000) and thus may serve as an excellent ecofriendly tool for weed management.…”

Section: Introductionmentioning

confidence: 99%

Chemical Composition and Phytotoxicity of Volatile Essential Oil from Intact and Fallen Leaves of Eucalyptus citriodora

Batish

Singh

Setia

et al. 2006

Zeitschrift Für Naturforschung C

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A total of 23 volatile constituents was identified and characterized by GC and GC-MS in the volatile essential oil extracted from intact (juvenile and adult) and fallen (senescent and leaf litter) leaves of lemon-scented eucalyptus (Eucalyptus citriodora Hook.). The leaves differed in their pigment, water and protein content, and C/N ratio. The oils were, in general, monoterpenoid in nature with 18 monoterpenes and 5 sesquiterpenes. However, a great variability in the amount of essential oils and their individual constituents was observed in different leaf tissues. The amount was maximum in the senescent leaves collected from the floor of the tree closely followed by that from juvenile leaves. In all, 19 constituents were identified in oil from juvenile and senescent leaves compared to 23 in adult leaves and 20 in leaf litter, respectively. Citronellal, a characteristic monoterpene of the oil reported hitherto was found to be more (77Ð78%) in the juvenile and senescent leaves compared to 48 and 54%, respectively, in the adult leaves and leaf litter. In the adult leaves, however, the content of citronellol Ð another important monoterpene Ð was very high (21.9%) compared to other leaf types (7.8Ð12.2%). Essential oil and its two major monoterpenes viz. citronellal and citronellol were tested for their phytotoxicity against two weeds (Amaranthus viridis and Echinochloa crus-galli) and two crops (Triticum aestivum and Oryza sativa) under laboratory conditions. A difference in the phytotoxicity, measured in terms of seedling length and dry weight, of oil from different leaves and major monoterpenes was observed. Oil from adult leaves was found to be most phytotoxic although it occurs in smaller amount (on unit weight basis). The different toxicity of different oil types was due to the relative amount of individual monoterpenes present in the oil, their solubility and interactive action. The study concludes that oil from senescent and juvenile leaves being rich in citronellal could be used as commercial source of citronellal whereas that from adult leaves for weed management programmes as it was the most phytotoxic.

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Section: Introductionmentioning

confidence: 99%

Chemical Composition and Phytotoxicity of Volatile Essential Oil from Intact and Fallen Leaves of Eucalyptus citriodora

Batish

Singh

Setia

et al. 2006

Zeitschrift Für Naturforschung C

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“…(Bainard and Isman, 2006;Kim et al, 2008;Tworkoski, 2002;Yun et al, 2012) Means are based on data from three replicates. a The herbicidal activity was determined by visual injury 7 days after the application of the essential oil.…”

Section: 제초 활성 검정mentioning

confidence: 99%

Herbicidal Activities of Essential Oils from Pine, Nut Pine, Larch and Khingan Fir in Korea

Yun¹,

Cho²,

Yeon³

et al. 2013

Weed & Turfgrass Science

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ABSTRACT. The objective of this research was to understand herbicidal activity of essential oils isolated from leaves of pine (Pinus densiflora), nut pine (Pinus koraiensis), larch (Larix kaempferi) and khingan fir (Abies nephrolepsis) in Korea. In a seed bioassay, essential oils of nut pine, larch and khingan fir inhibited the growth of rapeseed (Brassica napus) seedlings by 50% at 4,766, 1,865, 5,934 µg ml -1 , respectively, however, that of pine did not show any herbicidal effect. In a green house experiment, fall panicum, Southern crabgrass, sorghum, barnyardgrass, quackgrass, black nightshade, Indian jointvetch, velvet leaf, and Japanese morningglory were controlled in 24 hours by the foliar application of 10% essential oils from pine, nut pine, larch and khingan fir. The treated plant parts showed burndown effect, however, new shoots appeared 3 days after treatment. Results of GC-MS analysis showed that essential oils from pine, nut pine, larch and khingan fir contained 16, 25, 25, and 16 compounds, respectively, with hydrocarbons, alcohols, ketones, and esters. The major compounds of the essential oils were 3-carene, bornyl acetate, camphene, limonene, α-pinene, β-pinene and β-phellandrene.

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“…Essential oils are known to be effective herbicides [55]. Similarly birch tar oil has shown a herbicidal effect on numerous species of weeds [56].…”

Section: Wood Vinegar As Herbicide and Plant Growth Enhancermentioning

confidence: 99%

History and Use of Wood Pyrolysis Liquids as Biocide and Plant Protection Product

Tiilikkala¹,

Fagernäs²,

Tiilikkala³

2010

TOASJ

154

107

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Archeological studies have found that pyrolysis liquids were already used in the time of the Neanderthal. Wood vinegar and other slow pyrolysis liquids are produced as a by-product of charcoal production. However, future business ideas may be the other way round as pyrolysis liquids may replace synthetic chemicals in the form of pesticides and biocides.Directives and regulations related to the sustainable use of pesticides govern and direct plant protection strategies towards a lower use of synthetic chemicals. It is hoped that many mega trends of global policies will boost the use of plant based products given that a reduced reliance on fossil fuel is a general target in the global food and feed production economy. Pyrolysis technology has been actively studied and developed around the world and is linked to the development of the knowledge based bio-economy. The importance and social impact of pyrolysis technologies will also be enhanced because it is a practicable technique in the sustainable use of wastes and biomasses. However, very little scientific evidence is available to support efficacy claims of wood vinegar and toxicology assessments of the products used. Wood tar has been investigated a bit more thoroughly. The aim of this review was to clarify the potential of slow pyrolysis liquids in agricultural use, in particular, in pesticide applications. In addition, some of the main challenges in developing novel bio control technologies are discussed and the barriers in the commercialization of biological control agents are revealed.

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Herbicide effects of essential oils

Cited by 266 publications

References 13 publications

Chemical Composition and Phytotoxicity of Volatile Essential Oil from Intact and Fallen Leaves of Eucalyptus citriodora

Chemical Composition and Phytotoxicity of Volatile Essential Oil from Intact and Fallen Leaves of Eucalyptus citriodora

Herbicidal Activities of Essential Oils from Pine, Nut Pine, Larch and Khingan Fir in Korea

History and Use of Wood Pyrolysis Liquids as Biocide and Plant Protection Product

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