Nematicidal Efficacy of Fluensulfone against False Root-knot Nematode (Nacobbus aberrans) in Cucumber Crop under Field Conditions

2016 ◽  
Vol 14 (2) ◽  
pp. 1-8 ◽  
Author(s):  
José Alonso Calvo-Araya ◽  
Martha Orozco-Aceves
Keyword(s):  
Field Conditions ◽  
Root Knot Nematode ◽  
Nacobbus Aberrans

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

Application of PSX biocontrol preparation confers root-knot nematode management and increased fruit quality in tomato under field conditions

2015 ◽  
Vol 26 (2) ◽  
pp. 174-180 ◽  
Author(s):  
Dong-Dong Niu ◽  
Ying Zheng ◽  
Li Zheng ◽  
Chun-Hao Jiang ◽  
Dong-Mei Zhou ◽  
...  
Keyword(s):  
Fruit Quality ◽  
Field Conditions ◽  
Root Knot Nematode ◽  
Nematode Management

scholarly journals αβ-Dehydrocurvularin isolated from the fungus Aspergillus welwitschiae effectively inhibited the behaviour and development of the root-knot nematode Meloidogyne graminicola in rice roots

2020 ◽  
Author(s):  
Chao xiang ◽  
Ying Liu ◽  
Shi-Ming Liu ◽  
Ya-Fei Huang ◽  
Ling-An Kong ◽  
...  
Keyword(s):  
Active Compound ◽  
Nematicidal Activity ◽  
Field Conditions ◽  
Median Lethal Concentration ◽  
Root Knot Nematode ◽  
Control Efficacy ◽  
Meloidogyne Graminicola ◽  
Rice Roots ◽  
Gall Index

Abstract Background: The root-knot nematode Meloidogyne graminicola has become a serious threat to rice production as a result of the cultivation changes from transplanting to direct seeding. The nematicidal activity of Aspergillus welwitschiae have been investigated in vitro , and the disease control efficacy of the active compound has been evaluated under greenhouse and field conditions. Results: The active compound αβ-dehydrocurvularin (αβ-DC), isolated by nematicidal assay-directed fractionation, showed significant nematicidal activity against M. graminicola , with an median lethal concentration (LC 50 ) value of 122.2 μg mL −1 . αβ-DC effectively decreased the attraction of rice roots to nematodes and the infection of nematodes and also suppressed the development of nematodes under greenhouse conditions. Moreover, αβ-DC efficiently reduced the root gall index under field conditions. Conclusion: To our knowledge, this is the first report to describe the nematicidal activity of αβ-DC against M. graminicola . The results obtained under greenhouse and field conditions provide a basis for developing commercial formulations from αβ-DC to control M. graminicola in the future. Keywords: Meloidogyne graminicola ; αβ-dehydrocurvularin; nematicidal activity; attractiveness; development; behaviour

scholarly journals αβ-Dehydrocurvularin isolated from the fungus Aspergillus welwitschiae effectively inhibited the behaviour and development of the root-knot nematode Meloidogyne graminicola in rice roots

2019 ◽  
Author(s):  
Chao xiang ◽  
Ying Liu ◽  
Shi-Ming Liu ◽  
Ya-Fei Huang ◽  
Ling-An Kong ◽  
...  
Keyword(s):  
Active Compound ◽  
Nematicidal Activity ◽  
Field Conditions ◽  
Median Lethal Concentration ◽  
Root Knot Nematode ◽  
Control Efficacy ◽  
Meloidogyne Graminicola ◽  
Rice Roots ◽  
Gall Index

Abstract Background: The root-knot nematode Meloidogyne graminicola has become a serious threat to rice production as a result of the cultivation changes from transplanting to direct seeding. The nematicidal metabolites of Aspergillus welwitschiae have been investigated in vitro, and the disease control efficacy of the active compound has been evaluated under greenhouse and field conditions.Results: The active compound αβ-dehydrocurvularin (αβ-DC), isolated by nematicidal assay-directed fractionation, showed significant nematicidal activity against M. graminicola, with an median lethal concentration (LC50) value of 122.2 μg mL−1. αβ-DC effectively decreased the attraction of rice roots to nematodes and the infection of nematodes and also suppressed the development of nematodes under greenhouse conditions. Moreover, αβ-DC efficiently reduced the root gall index under field conditions.Conclusion: To our knowledge, this is the first report to describe the nematicidal activity of αβ-DC against M. graminicola. The results obtained under greenhouse and field conditions provide a basis for developing commercial formulations from αβ-DC to control M. graminicola in the future.

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.

Greenhouse and field resistance in cucumber to root-knot nematodes

Nematology ◽  
1999 ◽  
Vol 1 (3) ◽  
pp. 279-284 ◽  
Author(s):  
S. Alan Walters ◽  
Todd C. Wehner ◽  
Kenneth R. Barker
Keyword(s):  
Cucumis Sativus ◽  
Multiple Root ◽  
Nematode Species ◽  
Nematode Resistance ◽  
Field Resistance ◽  
Field Conditions ◽  
Meloidogyne Arenaria ◽  
Root Knot Nematode ◽  
Root Knot Nematodes ◽  
Race 2

Abstract Ten cultigens were evaluated for resistance to Meloidogyne arenaria races 1 and 2, and M. javanica under greenhouse and field conditions. Resistance to M. arenaria races 1 and 2, and M. javanica was verified in Cucumis sativus var. hardwickii line LJ 90430 and to M. arenaria race 2 in C. sativus var. sativus Southern Pickler and Mincu in a greenhouse test. Another cultigen of C. sativus var. hardwickii (PI 215589) was found to be resistant to M. arenaria race 2 but not to other root-knot nematode species tested. LJ 90430 is the cultigen of choice to develop root-knot nematode resistant cucumbers, since it has multiple root-knot nematode resistance and is cross-compatible with cucumber. Greenhouse and field data were positively correlated (r = 0.74) over both years. Experiment repeatabilities were calculated from the cultigens infected with root-knot nematodes under both greenhouse and field conditions. Four environments (greenhouse and field over 2 years) were used in the analysis. Repeatabilities were high in all instances (ranging from 0.83-0.99) and indicated that the environment (field or greenhouse) was not an important factor in assessing root-knot nematode resistance for the cultigens evaluated. Resistenz von Gurkengegen Wurzelgallennematoden im Gewachshaus undim Freiland - Unter Gewachshausund Freilandbedingungen wurden zehn Cultigene auf ihre Resistenz gegen Meloidogyne arenaria Rassen 1 und 2 und gegen M. javanica gepruft. Bei Cucumis sativus var. hardwickii Linie LJ 90430 wurde im Gewachshausversuch Resistenz gegen M. arenaria Rassen 1 und 2 sowie gegen M. javanica nachgewiesen, und in C. sativus var. sativus "Southern Pickler" und "Mincu" Resistenz gegen M. arenaria Rasse 2. Cultigen C. sativus var. hardwickii (PI 215589) war resistent gegen M. arenaria Rasse 2 aber nicht gegen die anderen gepruften Arten von Wurzelgallennematoden. LJ 90430 ist das Cultigen der Wahl bei der Entwicklung von Gurken, die gegen Wurzelgallennematoden resistent sind, da es multiple Resistenzen gegen Wurzelgallennematoden besitzt und kreuzungsvertraglich mit Gurke ist. Die Ergebnisse der Gewachshaus- und Feldversuche waren uber beide Versuchsjahre hin positiv korreliert (r = 0,74). Ausgehend von den Cultigenen, die im Gewachshaus und im Freiland mit Wurzelgallennematoden infiziert waren, wurden die Wiederholbarkeiten der Versuche berechnet. Dabei wurden vier verschiedene Umweltbedingungen (Gewachshaus und Freiland uber zwei Jahre) verwendet. Die Wiederholbarkeiten waren in allen Fallen hoch (0,83-0,99) und zeigten an, dass die Umwelt (Freiland oder Gewachshaus) kein wichtiger Faktor bei der Bestimmung der Resistenz gegen Wurzelgallennematoden bei den gepruften Cultigenen war.

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