Efficacy of integrated microorganisms in controlling root-knot nematode Meloidogyne javanica infecting peanut plants under field conditions

Abstract To investigate the influence of deficit irrigation on the root-knot nematode, Meloidogyne javanica, and its interaction with the eggplant crop, field experiments were conducted at two drip-irrigated agricultural areas in Jordan. Effects of limiting irrigation levels to 80, 60, 40 and 20% of the field capacity (FC) were compared with full irrigation (100%) treatment. Growth of eggplant plants was greatly reduced at irrigation levels of 40 and 20% FC at one field location, suggesting that the influence of deficit irrigation is field-dependant. Fruit yield was similar at all irrigation levels, except at 20% level, where a lower yield was noticed compared to 100% irrigation. Root galling of eggplant caused by the nematode was significantly lower at irrigation levels of 20 and 40% than 80 and 100% of FC, but was field-dependant at 60% of FC. The final nematode population was obviously lower at irrigation levels of 20, 40 and 60% than 80 and 100%. Thus, deficit irrigation to levels of 40 or 60% of FC can be utilised for the management of M. javanica infection in eggplant under field conditions.

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Mineral composition of beetroot treated with potential elicitors and inoculated with Meloidogyne javanica

Chemical and Biological Technologies in Agriculture ◽

10.1186/s40538-020-00196-2 ◽

2020 ◽

Vol 7 (1) ◽

Author(s):

Paula Juliana Grotto Débia ◽

Beatriz Cervejeira Bolanho ◽

Claudia Regina Dias-Arieira

Keyword(s):

Population Density ◽

Mineral Composition ◽

Integrated Management ◽

Meloidogyne Javanica ◽

Nematode Population ◽

Root Knot Nematode ◽

Cu Content ◽

Manganese Zinc ◽

Nematode Population Density ◽

Elicitor Treatments

Abstract Background The root-knot nematode Meloidogyne javanica can infect beetroots, causing extensive damage to this food crop. As chemical and genetic control tactics have shown limited efficacy, new strategies are needed to improve the integrated management of this parasite. This study assessed the influence of potential defence elicitors and M. javanica infection on the mineral composition of beetroot. Plants were treated with acibenzolar-S-methyl (ASM), citrus biomass, or a mannanoligosaccharide-based product (MOS) and inoculated with 1000 eggs and second-stage juveniles of M. javanica. At 60 days after inoculation, beetroot plants were harvested and evaluated for nematode population density, vegetative growth, and mineral content. Results All potential elicitors reduced nematode population density in beetroots (p ≤ 0.10) and improved the vegetative parameters of inoculated plants (p ≤ 0.05), except shoot fresh weight. Some minerals were found to be negatively affected by treatments, particularly calcium, whose levels were consistently lower in treated plants. On the other hand, M. javanica inoculation increased magnesium, iron, manganese, zinc, and copper contents in beetroots. However, the latter mineral (Cu content) of inoculated plants was positively influenced by MOS and ASM. Conclusion Potential elicitor treatments did not improve the mineral composition of beetroot, but were effective in reducing nematode population density. Plants inoculated with M. javanica had higher mineral levels. However, gall formation decreases the commercial value of the crop and might render it unsuitable for commercialisation. M. javanica-infected beetroots may be used for nutrient extraction or sold to food processing industries.

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Role of cyanide production by Pseudomonas fluorescens CHA0 in the suppression of root-knot nematode, Meloidogyne javanica in tomato

World Journal of Microbiology and Biotechnology ◽

10.1007/s11274-005-9084-2 ◽

2006 ◽

Vol 22 (6) ◽

pp. 641-650 ◽

Cited By ~ 62

Author(s):

Imran A. Siddiqui ◽

S. Shahid Shaukat ◽

Imtiaz Hussain Sheikh ◽

Aly Khan

Keyword(s):

Pseudomonas Fluorescens ◽

Meloidogyne Javanica ◽

Root Knot Nematode

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A Single Recessive Gene for Resistance to the Root-Knot Nematode (Meloidogyne Javanica) in Cucumis sativus var. hardwlckii

Journal of Heredity ◽

10.1093/oxfordjournals.jhered.a023060 ◽

1997 ◽

Vol 88 (1) ◽

pp. 66-69 ◽

Cited By ~ 9

Author(s):

S. A. Walters ◽

T. C. Wehner ◽

K. R. Barker

Keyword(s):

Cucumis Sativus ◽

Recessive Gene ◽

Meloidogyne Javanica ◽

Single Recessive Gene ◽

Root Knot Nematode

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A case of infection on the scion of grafted tomatoes by the root-knot nematode Meloidogyne javanica

Acta agriculturae Slovenica ◽

10.2478/v10014-007-0012-z ◽

2007 ◽

Vol 89 (1) ◽

Cited By ~ 2

Author(s):

Emmanuel Tzortzakakis

Keyword(s):

Meloidogyne Javanica ◽

Root Knot Nematode

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The effect of organic compost of Caryocar brasiliense waste against Meloidogyne javanica in two vegetable crops

Nematology ◽

10.1163/15685411-bja10103 ◽

2021 ◽

pp. 1-8

Author(s):

Fabíola de J. Silva ◽

Regina C.F. Ribeiro ◽

Adelica A. Xavier ◽

Vanessa A. Gomes ◽

Paulo V.M. Pacheco ◽

...

Keyword(s):

Integrated Control ◽

Meloidogyne Javanica ◽

Control Measures ◽

Vegetable Crops ◽

Root Knot Nematode ◽

Second Stage ◽

Tomato Roots ◽

Crop Development ◽

Caryocar Brasiliense ◽

Organic Compost

Summary Root-knot nematodes (Meloidogyne spp.) are responsible for various significant crop losses, which require taking integrated control measures. The present study aimed to identify a possible sustainable approach to the management of Meloidogyne javanica in vegetable crops using an organic compound based on pequi (Caryocar brasiliense) fruit residues. A pot experiment was conducted using cultivars of tomato and lettuce susceptible to M. javanica, with three amendments including inorganic fertiliser, cattle manure and five doses of organic compost with pequi residues. All treatments were inoculated with second-stage juveniles of M. javanica to simulate the root-knot nematode disease in field conditions. Increasing doses of organic compost with pequi residues from 5 kg m−3 to 30 kg m−3 promoted a significant decrease in the nematode population in both cultures evaluated. Organic compost (30 kg m−3) reduced the numbers of galls and eggs of M. javanica by 41.6 and 46.5% in tomato roots, and by 80.3 and 59.2% in lettuce roots, respectively, compared with non-treated control. Organic compost also increased crop development considerably. In general, there was a 43.0% increase in plant development compared to non-treated control. Hence, organic compost of pequi residues could be an alternative to toxic chemical nematicides and recommended as eco-friendly management of M. javanica in vegetable crops.

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