scholarly journals Pathogenic Variability among Eight Populations of Meloidogyne javanica Isolates on Tomato Plants

2015 ◽  
Vol 43 (1) ◽  
pp. 79-87
Author(s):  
Mohamed Banora
Keyword(s):  
Meloidogyne Javanica ◽  
Tomato Plants ◽  
Pathogenic Variability

Cover crops and Pochonia chlamydosporia for the control of Meloidogyne javanica

Nematology ◽  
2011 ◽  
Vol 13 (8) ◽  
pp. 919-926 ◽  
Author(s):  
Guilherme S. de Podestá ◽  
Rosangela Dallemole -Giaretta ◽  
Silamar Ferraz ◽  
Ernani Luis Agnes ◽  
Leandro Grasside Freitas ◽  
...  
Keyword(s):  
Pearl Millet ◽  
Cover Crops ◽  
Soil Cover ◽  
Meloidogyne Javanica ◽  
Infested Soil ◽  
Tomato Seedling ◽  
Tomato Plants ◽  
Pochonia Chlamydosporia ◽  
Colony Forming Units ◽  
Tillage System

AbstractThe objective of this research was to evaluate the effect of the combination of Pochonia chlamydosporia var. chlamydosporia with summer and winter cover plants on the control of Meloidogyne javanica on tomato plants under glasshouse conditions. Treatment combinations were with four soil covers (pearl millet and Surinam grass in Experiment 1, oil radish and black oat in Experiment 2; plus tomato and fallow controls) and two P. chlamydosporia treatments (with or without the fungus). The antagonist was applied to nematode-infested soil when the cover crops or tomato were planted. Tomato plants were removed and the above-ground parts of the cover crops were cut, dried, and placed on the pots 60 days after planting. One tomato seedling was transplanted in each pot in a no-tillage system and cultivated for 60 days. Surinam grass, pearl millet and black oat reduced galls and eggs of M. javanica by more than 90%, without application of the fungus. However, P. chlamydosporia + Surinam grass significantly reduced by 72% the number of galls compared with cultivation of the grass in soil without the fungus. Pochonia chlamydosporia became established in soil and could be re-isolated at the end of both experiments. Colony forming units (CFU) (g soil)–1 varied from 1.0 × 105 (fallow) to 2.6 × 105 (pearl millet) and from 1.1 × 105 (fallow) to 2.3 × 105 (oil radish) for the experiments with summer soil cover crops and winter soil cover crops, respectively. The cultivation of Surinam grass, pearl millet and black oat reduced M. javanica populations, and the combination with P. chlamydosporia may favour the establishment of the fungus in the soil and enhance the control of the nematode.

scholarly journals EFFECT OF THE AQUEOUS EXTRACT OF THE MINT (Mentha sp.) AND Lantana camara FOR Meloidogyne javanica IN TOMATO PLANTS IN A GREENHOUSE CONDITION

Nucleus ◽  
2016 ◽  
Vol 13 (1) ◽  
pp. 15-24
Author(s):  
Bianca Oliveira Gonçalves Costa ◽  
Misael Umberto de Oliveira ◽  
Kenji Cláudio Augusto Senô
Keyword(s):  
Aqueous Extract ◽  
Meloidogyne Javanica ◽  
Lantana Camara ◽  
Greenhouse Condition ◽  
Tomato Plants

Nematicidal activity of essential oil components against the root-knot nematode Meloidogyne javanica

Nematology ◽  
2001 ◽  
Vol 3 (2) ◽  
pp. 159-164 ◽  
Author(s):  
Yuji Oka
Keyword(s):  
Essential Oil ◽  
Meloidogyne Javanica ◽  
Nematicidal Activity ◽  
Root Knot Nematode ◽  
Tomato Plants ◽  
Pot Experiments ◽  
Application Methods ◽  
Oil Components ◽  
Shoot Weight

AbstractNematicidal activity of eight essential oil components; trans -anethole, anis alcohol, p-anisaldehyde, benzaldehyde, 4-methoxyphenol, trans-cinnamaldehyde, (R)-(+)-pulegone, 2-furaldehyde, and a non-essential oil component anisole, was tested against the root-knot nematode Meloidogyne javanica in solutions in 200-ml and 3-l pots and in microplots. Among the anisole derivatives, p-anisaldehyde showed the highest nematicidal activity in solutions and in soil. However, trans-cinnamaldehyde, 2-furaldehyde and benzaldehyde showed higher nematicidal activity than p-anisaldehyde in the 3-l pot experiments. EC50 values of trans-cinnamaldehyde for juvenile immobilisation and hatching inhibition in vitro were as low as 15 and 11.3 μl/l, respectively. In the 3-l pot experiments, trans-cinnamaldehyde, 2-furaldehyde, benzaldehyde and carvacrol at a concentration of 100 mg/kg greatly reduced the root galling of tomato, whereas trans-anethole was not effective. In a microplot experiment, soil treatment with trans-cinnamaldehyde (50 ml/m2) reduced the galling index and increased the shoot weight of tomato plants. Although further experiments, such as development of formulations and application methods, are needed, some essential oil components, especially aldehydes, can be developed into lowtoxicity nematicides.

The relationships of time and temperature to body weight and numbers of endospores in Pasteuria penetrans-infected Meloidogyne javanica females

Nematology ◽  
2004 ◽  
Vol 6 (1) ◽  
pp. 33-36 ◽  
Author(s):  
Daim Ali Darban ◽  
Barbara Pembroke ◽  
Simon Gowen
Keyword(s):  
Body Weight ◽  
Meloidogyne Javanica ◽  
Pasteuria Penetrans ◽  
Tomato Plants ◽  
Rate Of Increase ◽  
Growth Room

Abstract Tomato plants inoculated with Meloidogyne javanica juveniles infected with Pasteuria penetrans were grown in a glasshouse (20-32°C) for 36, 53, 71 and 88 days and in a growth room (26-29°C) for 36, 53, 71 and 80 days. Over these periods the numbers of P.penetrans endospores in infected M. javanica females and the weights of individual infected females increased. In the growth room, most spores (2.03 106) were found after 71 days. However, in the glasshouse the rate of increase was slower and spore numbers were still increasing at the final sampling at 88 days (2.04 106), as was the weight of the nematodes (72 μg). Weights of uninfected females reached a maximum of 36.2 and 43.1 μg after 71 days in the growth room and glasshouse, respectively.

scholarly journals Biocontrol of Meloidogyne javanica on Tomato Plants byHypocrea lixii(the Teleomorph ofTrichoderma harzianum)

2014 ◽  
Vol 42 (11) ◽  
pp. 1660-1660
Author(s):  
Abdallah M. Elgorban ◽  
Mohamed A. Abdel-Wahab ◽  
Ali H. Bahkali ◽  
Basheer A. Al-Sum
Keyword(s):  
Meloidogyne Javanica ◽  
Tomato Plants

scholarly journals Plant Health and Rhizosphere Microbiome: Effects of the Bionematicide Aphanocladium album in Tomato Plants Infested by Meloidogyne javanica

2020 ◽  
Vol 8 (12) ◽  
pp. 1922
Author(s):  
Claudia Leoni ◽  
Elisabetta Piancone ◽  
Nicola Sasanelli ◽  
Giovanni Luigi Bruno ◽  
Caterina Manzari ◽  
...  
Keyword(s):  
Meloidogyne Javanica ◽  
Severity Index ◽  
Plant Health ◽  
Soil Nematode ◽  
Root Knot Nematode ◽  
Tomato Plants ◽  
Rhizosphere Microbiome ◽  
Inorganic Substances ◽  
Antagonistic Microorganisms ◽  
Aphanocladium Album

The artificial introduction in the soil of antagonistic microorganisms can be a successful strategy, alternative to agrochemicals, for the control of the root-knot nematodes (Meloidogyne spp.) and for preserving plant health. On the other hand, plant roots and the associated rhizosphere constitute a complex system in which the contribution of microbial community is fundamental to plant health and development, since microbes may convert organic and inorganic substances into available plant nutrients. In the present study, the potential nematicidal activity of the biopesticide Aphanocladium album (A. album strain MX-95) against the root-knot nematode Meloidogyne javanica in infected tomato plants was investigated. Specifically, the effect of the A. album treatment on plant fitness was evaluated observing the plant morphological traits and also considering the nematode propagation parameters, the A. album MX-95 vitality and population density. In addition, the treatment effects on the rhizosphere microbiome were analysed by a metabarcoding procedure. Treatments with A. album isolate MX-95 significantly decreased root gall severity index and soil nematode population. The treatment also resulted in increased rhizosphere microbial populations. A. album MX-95 can be favourably considered as a new bionematicide to control M. javanica infestation.

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