Management of Meloidogyne incognita and other phytonematodes infecting Amaranthus cruentus and Telfairia occidentalis with African marigold (Tagetes erecta) and Siam weed (Chromolaena odorata)

Ogundele, R. A.; Oyedele, D. J.; Adekunle, O. K.

doi:10.1007/s13313-016-0438-z

Cited by 14 publications

(6 citation statements)

References 19 publications

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“…A recent study in Southwest, Nigeria showed that the interactions between Helicotylenchus and other plant parasitic nematodes resulted in `significant yield losses in some vegetable fields 14,15 . The nematode is known to prefer soils rich in organic matter 36 .…”

Section: Discussionmentioning

confidence: 99%

“…In several studies conducted in many African countries, Pratylenchus spp. were found to be associated with a number of vegetables and in some cases it was recorded as a major pest in the study areas [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] . Xiphinema, Longidorus and Paratrichodorus sp.…”

Section: Discussionmentioning

confidence: 99%

“…In this study the nematodes were encountered in hydromorphic fields. The nematode has been shown to reduce the yields of T. occidentalis and A. cruentus in Nigeria 15 .…”

Section: Discussionmentioning

confidence: 99%

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Plant Parasitic Nematodes Associated with Three African Indigenous Vegetables in Southwest Nigeria

Amulu,

Oyedele,

Adekunle

2024

Trends Agric. Sci

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Background and Objective: African indigenous vegetables are rich in nutrients and medicinal properties that are important for health and vitality, but their availability is on the decline partly due to attacks by plant parasitic nematodes, hence field surveys were conducted in 2016 and 2017 to investigate the distribution of plant parasitic nematodes and their interactions with free-living nematodes in fields planted to three African indigenous vegetables in Southwest Nigeria. Materials and Methods: A total of 180 soil samples were taken from 180 farms in all Local Government Areas (LGAs) visited in the four States in Southwest Nigeria. Samples were taken from three vegetable fields in all the LGAs visited. Nematodes were extracted from 200 mL sub-samples; the nematodes were counted and identified under a compound microscope using a pictorial guide. Results: The results showed that 16 genera of plant parasitic nematodes were found associated with Amaranthus cruentus, Solanum macrocarpon and Telfairia occidentalis. Meloidogyne, Helicotylenchus, Rotylenchulus, Xiphinema, Pratylenchus and Hoplolaimus were the most abundant nematode species encountered in vegetable fields in the study areas. The correlation analysis shows an antagonistic relationship between free-living nematodes and plant parasitic nematodes. Conclusion: There is a need to cultivate vegetable crops to suppress the populations of plant parasitic nematodes in Southwest Nigeria.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Plant Parasitic Nematodes Associated with Three African Indigenous Vegetables in Southwest Nigeria

Amulu,

Oyedele,

Adekunle

2024

Trends Agric. Sci

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“…For example, in plots amended with seedlings of African marigold, significant reduction in population densities of M. incognita , Helicotylenchus spp., and Dolichodorus spp. were achieved, with corresponding increase in total N, available P and exchangeable K ( Ogundele et al, 2016 ). Tagetes is known to increase nematode-trapping fungi or parasitic fungi, and enhance both nematode egg and motile form parasitism.…”

Section: Composition Activity and Potency Of The Active Constituentsmentioning

confidence: 99%

A Review of the Potency of Plant Extracts and Compounds from Key Families as an Alternative to Synthetic Nematicides: History, Efficacy, and Current Developments

Mwamula

Kabir²,

Lee

2022

Plant Pathol J

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The global nematicides market is expected to continue growing. With an increasing demand for synthetic chemical-free organic foods, botanical nematicides are taking the lead as replacements. Consequently, in the recent years, there have been vigorous efforts towards identification of the active secondary metabolites from various plants. These include mostly glucosinolates and their hydrolysis products such as isothiocyanates; flavonoids, alkaloids, limonoids, quassinoids, saponins, and the more recently probed essential oils, among others. And despite their overwhelming potential, variabilities in quality, efficacy, potency and composition continue to persist, and commercialization of new botanical nematicides is still lagging. Herein, we have reviewed the history of botanical nematicides and regional progresses, the potency of the identified phytochemicals from the key important plant families, and deciphered some of the impediments involved in standardization of the active compounds in addition to the concerns over the safety of the purified compounds to non-target microbial communities.

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“…The other forb species can be used to manage root-lesion nematodes (Pratylenchus penetrans) and root-knot nematodes (Meloidogyne spp. ), as shown in studies on marigold (Pudasaini et al, 2006;Hooks et al, 2010;Adekunle, 2011;Ogundele et al, 2016).…”

Section: Cover Crop Species In Pure Standmentioning

confidence: 63%

On productivity, resource capture, and yield stability of cover crop species mixtures

Elhakeem¹

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Winter cover crops are grown in temperate regions to capture nitrogen, build organic matter in soil, and suppress weeds during autumn and winter. This thesis aimed to identify whether growing species mixtures instead of pure stands strengthens the ecosystem services provided by cover crops. Emphasis was given to productivity, resource capture and yield stability. From 2015 to 2019, I conducted fourteen field experiments across three locations in the Netherlands and one location in Germany.Twenty-five cover crop species were characterized as to their productivity to produce a shortlist of promising species for further studies. I found large differences in productivity between species. Species with early ground cover, such as crucifers and black oats, had the highest productivity and they showed the greatest suppression of weeds. An analysis was made of complementarity and dominance effects in mixtures. Complementarity occurred more often when the mixed species were equally productive, e.g. when combining oilseed radish and black oats, while mixing species with different productivity resulted more often in dominance of the highly productive species in the mixture. Mixing cover crop species within the row or in alternate rows had a small and variable effect on the competitive relationship between mixed species. Across all experiments, mixtures produced 25 to 42% more biomass and captured 11 to 34% more nitrogen than pure stands. This large difference was reduced when the comparison was restricted to the most productive pure stands and species mixtures. In this case, mixtures and pure stands produced similar biomass in most experiments, though, on average, mixtures captured 9% more nitrogen from soil than the best pure stands. In an analysis of data collected in multiple treatments at multiple sites and years, I analysed how the variability of yield differed between mixtures and pure stands. The contributions to yield variability were estimated as variance components using Bayesian mixed models. Yield variability was related to the variation in growing conditions as related to variation in soils and weather between sites and years. At this level there was no difference between mixtures and pure stands. Therefore, I conclude that mixtures do not provide insurance against variability in growing conditions. Within each combination of site and year (site-year), mixing species, however, significantly reduced the yield variability between treatments. This difference was mainly due to the low yield of some species when grown in pure stands, illustrating the importance of species choice. Moreover, mixtures had smaller within-field variation than pure stands. I investigated how biomass formation of cover crops can be separated in the processes of radiation interception and radiation use efficiency. Of the high yielding species, some intercepted large amounts of radiation (crucifers) and some had high radiation use efficiency (oats).Combining species with high radiation interception and high radiation use efficiency did, howev...

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Management of Meloidogyne incognita and other phytonematodes infecting Amaranthus cruentus and Telfairia occidentalis with African marigold (Tagetes erecta) and Siam weed (Chromolaena odorata)

Cited by 14 publications

References 19 publications

Plant Parasitic Nematodes Associated with Three African Indigenous Vegetables in Southwest Nigeria

Plant Parasitic Nematodes Associated with Three African Indigenous Vegetables in Southwest Nigeria

A Review of the Potency of Plant Extracts and Compounds from Key Families as an Alternative to Synthetic Nematicides: History, Efficacy, and Current Developments

On productivity, resource capture, and yield stability of cover crop species mixtures

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