Phythonematoxic properties and nematicidal potential ofTithonia diversifoliaextract and residue onMeloidogyne incognitainfecting yam (Discoria rotundata)

Odeyemi, I. S.; Adewale, K. A.

doi:10.1080/03235400903461039

Cited by 13 publications

(9 citation statements)

References 18 publications

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“…The major observation in DDG patterns generated by our study was that at low concentration ranges the products gradually reduced juvenile hatch (inhibition) (Figure 1), with others depicting this as negative linear models (Giannakou 2011;Odeyemi & Adewale 2011). Inhibition phases were followed by concentration ranges where juvenile hatch levelled off (neutral) (Figure 1), depicted in other studies as no effect on juvenile hatch (Payan et al 1987;Oka et al 2000).…”

Section: Inhibition Of Juvenile Hatchmentioning

confidence: 80%

Confirmation of bioactivities of active ingredients of nemarioc-AL and nemafric-BL phytonematicides

Dube

Mashela

2017

Acta Agriculturae Scandinavica, Section B — Soil & Plant Sc

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Nemarioc-AL and Nemafric-BL phytonematicides consistently reduced populations of plantparasitic nematodes. The contribution of juvenile hatch inhibition to the overall reduction of the nematode numbers by the two phytonematicides, with cucurbitacin A and B as active ingredients, respectively, remains undocumented. The objectives of this study were to examine (i) the response of Meloidogyne incognita second-stage juveniles (J2) hatch to increasing concentration of cucurbitacins A and B, (ii) the potential saturation of J2 hatch when exposed to cucurbitacins for extended incubation periods, (iii) the minimum inhibition concentration for J2 hatch and (iv) the reversibility of J2 hatch inhibition.. Eggs of M. incognita were exposed to a series of purified cucurbitacin A and B concentrations over five incubation periods of 24, 48, 72 h and extended incubation periods of 7 and 10 days. Methanol-dissolved cucurbitacin A and B were each diluted and pipetted into well-plates making 11 concentrations, ranging from 0.0 to 2.5 µg.ml −1 water solvent. Juvenile counts were made after 24, 48 and 72 h, with those for saturation assessed at 7 and 10 days. Thereafter, treatments were diluted five times, incubated again for 5 days and counted to establish reversibility of J2 hatch inhibition. In all incubation periods, treatment effects were highly significant (P ≤ 0.01), with J2 hatch and cucurbitacin concentrations exhibiting quadratic relations. Minimum inhibition concentrations of the two cucurbitacins were between 1.13 and 1.40 µg.ml −1 . Treatment effects for reversibility to J2 hatch inhibition were not significant (P > 0.05). In conclusion, J2 hatch inhibition could be one of the waysthrough which the two phytonematicides reduced population densities of Meloidogyne species. ARTICLE HISTORY

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Section: Inhibition Of Juvenile Hatchmentioning

confidence: 80%

Confirmation of bioactivities of active ingredients of nemarioc-AL and nemafric-BL phytonematicides

Dube

Mashela

2017

Acta Agriculturae Scandinavica, Section B — Soil & Plant Sc

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“…Authors have assessed its crude alkaloid fraction and they discovered that it suppresses egg hatching of M. incognita by 98 % from the second day after the necessary incubation and displayed 100 % inhibitory effect after 9 days. Tithonia extracts' treatment at the rate of 30 tons/ha on yam ( Discoria rotundata ) in the greenhouse experiments significantly curbed the growth of M. incognita (5,000 eggs/plant) reproduction, number of eggs, and juveniles, as well as root gall index ( Odeyemi and Adewale, 2011 ). Hence, B. verticillata could display a significant antinemic activity since it is alkaloid containing plant.…”

Section: Discussionmentioning

confidence: 99%

A review on Borreria verticillata: A potential bionematicide, channeling its significant antimicrobial activity against root-knot nematodes

Izuogu

Bello

Bello³

2020

Heliyon

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Phytopesticides are human-friendly beside been easily accessible and bio-degradable, are therefore environmentally friendly compared to the synthetic pesticides which huge adverse effects on human, animals and the ecosystem. Plants are large reservoir of secondary metabolites largely untapped or under-tapped for use as pesticides. One problem associated with this is to identify plants which can be assessed and further exploited for this use. Borreria verticillata belongs to Rubiaceae , it is native to South Americas but gained popularity globally. It is known as a weed, showing resistance to many synthetic pesticides and can be grown on a wide range of soil types. B. verticillata is used traditionally against skin diseases such as eczema, infectious dermatitis and scabies . Its antimicrobial application is large and efficient as revealed by most authors. This article inclines to propose and offer current studies with information on the various application of this plant species against various microorganisms, thereby extending its use against plant parasitic nematodes which cause severe yield losses to numerous agricultural crops. Most search engines, journals and dissertation search engines i.e. Google scholar, pubmed, sciencedirect, scopus, web of science, springer, elsevier, like Open-thesis, OATD, ProQuest and EthOs were queried by employing titles such as B. verticillata , Borreria verticillata and biological activity of B. verticillata . The most synonymous name was queried too i.e. Spermacoce verticillata . This review suggests a main point about this resistant weed i.e. its significant antimicrobial activity. It further emphases the need exploits this useful effect against nematodes since they are microorganisms. Phytochemistry of the B. verticillata was gathered in this study and the compounds isolated from the plant i.e. terpenes, iridoids, flavonoids and alkaloids (29 compounds) further provide a basis for a significant antihelmintic effect. The review concludes on the need to extends its antimicrobial activity to sustainable agriculture. Since it is a very common plant in Nigeria, it is easily accessible to farmer protect their cultivations from plant-parasitic nematode attacks.

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“…Tithonia residue treatment at the rate of 30 tons/ha on yam (Discoria rotundata) in the greenhouse experiments significantly suppressed M. incognita (5000 eggs/ plant) reproduction, number of eggs, and juveniles, as well as galling. 20 22 The brimstone (Morinda lucida) leaf crude extract (50 and 100% concentrations) and brimstone leaf powder (1 and 2 t/ha), rich in saponins and flavonoids, significantly increase the number of leaves, plant height, number of branches, and fresh leaf and root weight of Celosia argentea (L.), and also significantly reduce the gall index due to M. incognita. 23 When Acacia gummifera, Ceratonia siliqua, Ononis natrix, Tagetes patula, and Peganum harmala were evaluated for their nematicidal effect through their aqueous extract used directly in the in vitro test, and the nematicidal effect ranged between 67% and 95%.…”

Section: Chemical Classes Of Botanical Nematicidalsmentioning

confidence: 99%

Botanical Nematicides: A Review

Ntalli

Caboni

2012

J. Agric. Food Chem.

258

170

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Despite the uselfuness of nematicidal compounds in agricultural practices, some serious concerns are raised today about their excessive use leading to enhancement of biodegradation mechanisms in soil expressed as lack of efficacy under field conditions and resistance development. Moreover, the phase-out of methyl bromide has led to the need for a valid alternative to organophosporous and carbamate compounds, such us fosthiazate, fenamiphos, oxamyl, and aldicarb. In the past years, intregated pest management strategies have been practised worldwide to maximize crop production while maintaining and contributing to agriculture sustainability. Biopesticides and specifically bionematicides constitute a desirable component of pest management technology and practices. Particularly, in the frame of our ongoing research on natural nematicides of botanical origin, we have reviewed the international bibliography for candidate nematicidal compounds. We report herein the nematicidal activity of plant metabolites on the basis of their chemical characteristics and structure.

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Phythonematoxic properties and nematicidal potential ofTithonia diversifoliaextract and residue onMeloidogyne incognitainfecting yam (Discoria rotundata)

Cited by 13 publications

References 18 publications

Confirmation of bioactivities of active ingredients of nemarioc-AL and nemafric-BL phytonematicides

Confirmation of bioactivities of active ingredients of nemarioc-AL and nemafric-BL phytonematicides

A review on Borreria verticillata: A potential bionematicide, channeling its significant antimicrobial activity against root-knot nematodes

Botanical Nematicides: A Review

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