Mycorrhizas reduce tomato root penetration by false root-knot nematode Nacobbus aberrans

2018 ◽  
Vol 124 ◽  
pp. 262-265 ◽  
Author(s):  
Nicolás Marro ◽  
Milena Caccia ◽  
Marcelo E. Doucet ◽  
Marta Cabello ◽  
Alejandra Becerra ◽  
...  
Keyword(s):  
Root Penetration ◽  
Root Knot Nematode ◽  
Tomato Root ◽  
Nacobbus Aberrans

Effect of Steinernema feltiae-Xenorhabdus bovienii insect pathogen complex on Meloidogyne javanica

Nematology ◽  
2004 ◽  
Vol 6 (5) ◽  
pp. 671-680 ◽  
Author(s):  
Declan Fallon ◽  
Harry Kaya ◽  
Randy Gaugler ◽  
Brent Sipes
Keyword(s):  
Egg Production ◽  
Meloidogyne Javanica ◽  
Steinernema Feltiae ◽  
Root Penetration ◽  
Soybean Plant ◽  
Cortical Tissue ◽  
Root Knot Nematode ◽  
Colony Forming Units ◽  
Bacterial Treatment ◽  
Nematode Penetration

AbstractIsolates of Steinernema feltiae MG-14 from Hawaii and SN from France, and the symbiont Xenorhabdus bovienii from each nematode isolate, were tested for their glasshouse efficacy against the root-knot nematode, Meloidogyne javanica, on several vegetable plants. Steinernema feltiae application for 3-5 consecutive days at rates of 1000 or 10 000 infective juveniles (IJ) did not affect M. javanica root penetration and development in glasshouse pot experiments. IJ were recovered from the cortical tissue of tomatoes, soybeans, snow peas and cow peas. Xenorhabdus bovienii applied at 1010 colony-forming units (CFU) ml–1 reduced root-knot nematode penetration in cow peas but was ineffective in tomato or snow pea. Xenorhabdus bovienii metabolites had no effect on M. javanica root penetration and egg production in soybean. Soybean plant growth was unaffected by nematode and bacterial treatment; biomass was lower in M. javanica-infected soybean, irrespective of treatment, than in non-infected soybean, but the differences between the treatments were non-significant. Accordingly, the Steinernema feltiae-Xenorhabdus bovienii complex did not meet the objective for the suppression of M. javanica root penetration and development.

scholarly journals Chitosan Increases Tomato Root Colonization by Pochonia chlamydosporia and Their Combination Reduces Root-Knot Nematode Damage

2017 ◽  
Vol 8 ◽  
Author(s):  
Nuria Escudero ◽  
Federico Lopez-Moya ◽  
Zahra Ghahremani ◽  
Ernesto A. Zavala-Gonzalez ◽  
Aurora Alaguero-Cordovilla ◽  
...  
Keyword(s):  
Root Colonization ◽  
Root Knot Nematode ◽  
Tomato Root ◽  
Pochonia Chlamydosporia

External secretions from the false root-knot nematode, Nacobbus aberrans

Nematologica ◽  
1998 ◽  
Vol 44 (3) ◽  
pp. 326-330 ◽  
Author(s):  
K. Evans ◽  
J. Rowe ◽  
N. VON MEN-DE ◽  
M. Gravato-Nobre ◽  
R.H. MANZANILLA-LόPEZ
Keyword(s):  
Root Knot Nematode ◽  
Nacobbus Aberrans

scholarly journals Potency of plant-derived biological nematicides on root-knot disease of tomato, Lycopersicon lycopersicum (L.) Mill

2021 ◽  
Vol 7 (1) ◽  
pp. 1-5
Author(s):  
Olabiyi T.I
Keyword(s):  
Block Design ◽  
Water Extract ◽  
Growth And Yield ◽  
Root Knot Nematode ◽  
Tomato Root ◽  
Tomato Production ◽  
University Of Technology ◽  
Randomized Complete Block Design ◽  
Lycopersicon Lycopersicum ◽  
Experimental Plots

The aim of this research was to evaluate the effectiveness of plant-derived biological nematicides in the management of root-knot nematode disease of tomato. A piece of land measuring 8 m × 54 m was ploughed and raised beds were the experimental plots. The land was divided into 4 blocks, each block comprising 12 treatments and 4 replicates with a total of 48 experimental plots were fitted into randomized complete block design (RCBD). The experiment was carried out at the Teaching and Research Farms, Faculty of Agricultural Sciences, Ladoke Akintola University of Technology, Ogbomoso, Oyo State, Nigeria (Longitude 40E and Latitude 8010N) during 2018 planting season. 20 g macerated root gall of Celosia was applied to tomato root rhizosphere (inoculation). The plant-derived biological nematicides that were assessed on root-knot nematode disease of tomato, UC8 cultivar, include the leaf water extract of neem, castor, wild sunflower, cleome, siam weed, phyllanthus, nitta, tobacco, lantana and calotropis, mixed with black soap, at rate of 9:1 v/w. The black soap and distilled water served as adjuvant and solvent respectively, and as the control experiments. The results showed that the root galling and soil population of root-knot nematode were significantly reduced with consequent enhanced growth and yield of tomato in the plots treated with plant-derived biological nematicides, compared with the tomato in the control experiments. The study has demonstrated that the use of plant-derived biological nematicides can be effectively explored in the management of root-knot nematode disease. The application of plant-derived biological nematicides is therefore recommended for sustainable management of root-knot nematode disease in tomato production.

A fodder sorghum cultivar, ‘Kyushuko 3 go’, suppresses root-knot nematode, Meloidogyne incognita

Nematology ◽  
2019 ◽  
Vol 21 (5) ◽  
pp. 489-496 ◽  
Author(s):  
Gaku Murata ◽  
Tomoyuki Takai ◽  
Kenta Uesugi
Keyword(s):  
Root System ◽  
Meloidogyne Incognita ◽  
Green Manure ◽  
Field Tests ◽  
Field Conditions ◽  
Root Penetration ◽  
Root Knot Nematode ◽  
Population Densities ◽  
Second Stage ◽  
Fodder Production

Summary Commercially available sorghum cultivars were tested for resistance to Meloidogyne incognita in order to select cultivars that combine fodder production with M. incognita population management. Initially in a pot test with 12 sorghum cultivars, ‘Kyushuko 3 go’, a sorghum hybrid, supported very low M. incognita reproduction approximately 40 days after inoculation (dai) with 500 second-stage juveniles (J2) pot−1, similar to the resistant green manure ‘Tsuchitaro’. Further tests for development of M. incognita in roots (20 dai with 150 J2 (root system)−1) indicated that the resistance of ‘Kyushuko 3 go’ acts after nematode root penetration. In field tests in 2015 and 2016, ‘Kyushuko 3 go’ suppressed M. incognita population densities, although some variations in field conditions may influence reproduction of M. incognita on ‘Kyushuko 3 go’. These findings demonstrated M. incognita-resistant fodder sorghum cultivars could be a useful alternative to susceptible cultivars for root-knot nematode management.

scholarly journals Suppression of Root-Knot Nematode by Vermicompost Tea Prepared From Different Curing Ages of Vermicompost

Plant Disease ◽  
2017 ◽  
Vol 101 (5) ◽  
pp. 734-737 ◽  
Author(s):  
Shova Mishra ◽  
Koon-Hui Wang ◽  
Brent S. Sipes ◽  
Miaoying Tian
Keyword(s):  
Cucumis Sativus ◽  
Cucurbita Pepo ◽  
Root Penetration ◽  
Root Knot Nematode ◽  
Root Knot Nematodes ◽  
Meloidogyne Spp ◽  
Vermicompost Tea ◽  
Over Time

Suppression of root-knot nematodes (Meloidogyne spp.) by vermicompost tea (VCT) has been inconsistent. Greenhouse and laboratory trials were conducted to compare the effects of VCT prepared from different curing ages of vermicompost (VC) on root penetration, reproduction, and hatching of M. incognita. In the penetration experiment, zucchini (Cucurbita pepo) seedlings were drenched with VCT prepared from (i) uncured (UVC), (ii) partially cured (PVC), (iii) completely cured (CVC) vermicompost, and (iv) water or no vermicompost (NVC) 3 days prior to M. incognita inoculation. The experiment was repeated twice on cucumber (Cucumis sativus) and terminated one week after nematode inoculation. All three trials showed that UVC and PVC reduced (P ≤ 0.05) penetration of M. incognita compared with CVC and NVC. Two greenhouse trials showed that VCT from different curing ages of VC did not reduce the abundance of M. incognita juveniles in soil and eggs in roots 2.5 months after nematode inoculation. Two laboratory trials to examine hatching consistently showed that VCT from UVC and PVC suppressed hatching (P ≤ 0.05) compared with NVC, achieving 83.1% hatch reduction by UVC. Overall, VCT from UVC and PVC suppressed root penetration and hatching, but not the reproduction of M. incognita over time.

Influence of the mutualistic endophyte Fusarium oxysporum 162 on Meloidogyne incognita attraction and invasion

Nematology ◽  
2007 ◽  
Vol 9 (6) ◽  
pp. 771-776 ◽  
Author(s):  
Richard Sikora ◽  
Abd El-Fattah Dababat
Keyword(s):  
Fusarium Oxysporum ◽  
Root Exudates ◽  
Meloidogyne Incognita ◽  
Repellent Activity ◽  
Choice Test ◽  
Root Knot Nematode ◽  
Tomato Root ◽  
Tomato Roots

AbstractThe non-pathogenic endophytic Fusarium oxysporum strain 162 (FO162) has been selected for its capacity to reduce root-knot nematode galling on tomato. The objectives of this study were to investigate the influence of this fungus on invasion of tomato roots by Meloidogyne incognita. The number of M. incognita that invaded roots of plants treated with FO162 was significantly lower (reductions of 36.0-55.9%) than in the non-treated controls in linked twin-pot chambers. The results demonstrated that colonisation of the roots by FO162 affects the number of M. incognita that penetrate the roots. The results of a choice test in the absence of a plant indicated that the tomato root exudates collected from plants colonised by FO162 are either less attractive or they exude substances that have repellent activity toward M. incognita juveniles.

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