Nematicidal Activity of Essential Oils of Cymbopogon Grasses

“…This also confirms the works of various workers who investigated the activities of these extracts by showing a reduction in the population level of nematodes. For example Sangwin et al (1985), and Akhtar and Mahmood (1994), reported that these substances reduce the population of nematodes species by over 50%. The fewer number of galls may be indicative of an acquired resistivity conferred on the plant by the extracts.…”

Section: Resultsmentioning

confidence: 99%

Effect of Mahogany (<i>Khaya senegalensis L</i>) Leaf Extract on Root-Knot Nematode of Tomatoes (<i>Lycopersicum esculentum L.</i>)

Liman¹,

Ibrahim²,

Ibrahim³

et al. 2011

Nig J Bas App Sci

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A screen house experiment was conducted to test the efficacy of leaf extract of mahogany (Khaya senegalensis L) for the control of root-knot nematodes of tomato. The completely randomized design was used to test the materials. Results obtained showed that the leaf extracts of the mahogany plant significantly (P˂0.05) reduced the population of the nematodes compared to the untreated seedlings. It also indicated that there is significant difference (P˂0.05) on the effect of the extract on the test organism between the varying concentrations of the extract used. The study revealed that the higher the concentration of the extract the more its effect on the test organism. The result also showed a significant variation (P˂0.05) in the extent of galling, plant height and root lenght in tomato treated with different levels of concentrations of the leaves extracts. The implications of these findings were discussed.

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“…De acordo com Sangwan et al (1985), os constituintes químicos do óleo essencial de gramíneas do gênero Cymbopogon, quando combinados, exercem importante papel na atividade nematicida. O óleo essencial de Pelargonium graveolens demonstrou atividade nematicida a Meloidogyne incognita, em decorrência da presença de substâncias químicas como o citronelol, geraniol e linalol (Leela et al, 1992).…”

Section: Introductionunclassified

Atividade antagonista do óleo essencial de Lippia alba (Mill.) N. E. Brown (Verbenaceae) sobre Meloidogyne incognita (Kofoid & White) Chitwood

Gonçalves

Barbosa

Lima

et al. 2016

Rev. bras. plantas med.

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RESUMO: O controle de fitonematóides é uma tarefa difícil. A alta infestação de nematoides no solo obriga os produtores a usarem doses mais elevadas de nematicidas, ou ainda, a aumentarem a freqüência das aplicações, geralmente no solo, ocasionando maior potencial de dano ao homem e ao ambiente. Além disso, nematicidas convencionais vêm sofrendo grandes restrições de uso em muitos países. Desse modo, a busca de novas medidas de controle de fitonematóides é uma prioridade da agricultura sustentável. Desta forma, objetivou-se estudar o efeito de óleos essenciais de Lippia Alba, na mortalidade de juvenis pré-parasitas do segundo estádio de Meloidogyne incognita. O ensaio foi montado em delineamento inteiramente casualizado, com 4 repetições, em esquema fatorial 3×4 (3 quimiotipos x 4 concentrações) empregando-se três diferentes quimiotipos de L. Alba (I, II, III) nas concentrações de 0, 100, 500 e 1000 ppm, coletados em diferentes horas do dia (7, 9, 13, 16 e 19h ABSTRACT: Antagonist activity of the essential oil Lippia alba (Mill.) N. E. Brown (Verbenaceae) on Meloidogyne incognita (Kofoid & White) Chitwood. The control of nematodes is difficult. The high infestation of nematodes in the soil requires the producers use higher doses of nematicides, increasing the frequency of applications, usually in soil, causing negative effects to humans and the environment. Furthermore, conventional nematicides have suffered great use restrictions in many countries. Thus, the search for new measures to control nematodes is a priority of sustainable agriculture. Thus, the objective of this study was available the effect of essential oils from Lippia Alba against Meloidogyne incognita. The experiment was conducted in a completely randomized design with four replications in a factorial 3x4 (3 chemotypes and 4 concentrations) using three different chemotypes of L. Alba (I, II, III) at concentrations of 0, 100, 500 and 1000 ppm, collected in different times of day (7 AM, 9 AM, 1 PM, 4 PM e 7 PM). The data collected (% mortality) were subjected to analysis of variance and mean values were compared using the Tukey test. It was able to conclude that L. alba contains in its essential oil, compounds with significant effects on mortality of M. incognita. Thus, it is important to note that the greatest nematicide effect of essential oil of L. alba suggests the possibility of its use to control M. incognita.

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Nematicidal Activity of Essential Oils of Cymbopogon Grasses

Cited by 21 publications

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Soil amendment with chopped or ground dry leaves of six species of plants for the control of Meloidogyne javanica in tomato under greenhouse conditions

Soil amendment with chopped or ground dry leaves of six species of plants for the control of Meloidogyne javanica in tomato under greenhouse conditions

Effect of Mahogany (<i>Khaya senegalensis L</i>) Leaf Extract on Root-Knot Nematode of Tomatoes (<i>Lycopersicum esculentum L.</i>)

Atividade antagonista do óleo essencial de Lippia alba (Mill.) N. E. Brown (Verbenaceae) sobre Meloidogyne incognita (Kofoid & White) Chitwood

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