Root-knot nematodes (Meloidogyne hapla) can modify the positive plant intraspecific diversity-productivity effect on red clover in clover-grass communities

In field experiments at Harrow, Ontario, the southern root-knot nematode Meloidogyne incognita overwintered successfully on woody perennial roots of peach in a moderate winter, but was unable to survive a subsequent severe winter on this host. At Vineland Station, Ontario, M. incognita did not overwinter below the frost line in a moderate winter under alfalfa, a poor perennial host, but did overwinter under red clover and tomato in a severe winter, although the population was severely reduced. By comparison, the northern root-knot nematode Meloidogyne hapla survived well under all three hosts in both winters at depths from 0 to 90 cm.

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Precrop Effect of Red Clover (Trifolium pratense L.) and Alfalfa (Medicago sativa L.) on the Population Development of the Northern Root-Knot Nematode Meloidogyne hapla Chitwood, 1949 and on Succeeding Crops—A Pot Study

Agronomy ◽

10.3390/agronomy11040722 ◽

2021 ◽

Vol 11 (4) ◽

pp. 722

Author(s):

Renata Dobosz ◽

Roman Krawczyk

Keyword(s):

Population Density ◽

Medicago Sativa ◽

Trifolium Pratense ◽

Red Clover ◽

Continuous Cultivation ◽

Nematode Population ◽

Meloidogyne Hapla ◽

Root Knot Nematode ◽

Crop Species ◽

Tomato Growth

The northern root-knot nematode, Meloidogyne hapla, is a major pest of many crop species. The objective of the study was to determine how M. hapla population dynamics is affected by two precrops, i.e., Trifolium pratense and Medicago sativa, in three crop durations: one, two and three years of continuous cultivation. Moreover, we set ourselves the task of evaluating the effect of the legume precrop soil on the growth of the succeeding tomato plant (Solanum lycopersicum) and on the nematode population. The experiment was performed outdoors in pots with naturally infected soil. Both precrop species investigated were found to modify the J2 nematode population density in the soil. The galls and nematode females with egg masses were observed on the roots of both studied plant species at the end of each growing season. They appeared to be more abundant on the red clover roots than on those of the alfalfa. The obtained data indicate that the spring soil sampling is more appropriate for the estimation of the M. hapla population density in the red clover precrop soil. The legume precrop soil had a limiting effect on tomato growth and fruit yield. The nematode population negatively influenced tomato growth. The experiment revealed that tomato plants could be planted in alfalfa precrop soil following at least three years of continuous alfalfa cultivation. The same cannot be said of the cultivation of red clover as a precrop for tomatoes.

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Plant regeneration from Crotalaria spectabilis hairy roots which showed inhibited growth of root-knot nematodes (Meloidogyne hapla and M. incognita) in vitro

Plant Biotechnology ◽

10.5511/plantbiotechnology.12.0718a ◽

2012 ◽

Vol 29 (5) ◽

pp. 425-430 ◽

Cited By ~ 3

Author(s):

Akiko Ohara ◽

Hiroyuki Daimon ◽

Yoji Momota ◽

Dong Poh Chin ◽

Masahiro Mii

Keyword(s):

Plant Regeneration ◽

Hairy Roots ◽

Meloidogyne Hapla ◽

Root Knot Nematodes ◽

Crotalaria Spectabilis

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Isolate-by-cultivar interaction in root-knot nematodes Meloidogyne hapla, M. chitwoodi, and M. falla× on potato

Canadian Journal of Botany ◽

10.1139/cjb-76-1-75 ◽

1998 ◽

Vol 76 (1) ◽

pp. 75-82 ◽

Cited By ~ 2

Author(s):

J.G. Van der Beek ◽

P.F.G. Vereijken ◽

L.M. Poleij ◽

C.H. Van Silfhout

Keyword(s):

Meloidogyne Hapla ◽

Root Knot Nematodes

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Anaerobic Soil Disinfestation Reduces Viability of Sclerotinia sclerotiorum and S. minor Sclerotia and Root-Knot Nematodes in Muck Soils

Phytopathology ◽

10.1094/phyto-10-19-0386-r ◽

2020 ◽

Vol 110 (4) ◽

pp. 795-804

Author(s):

Andres D. Sanabria-Velazquez ◽

Anna L. Testen ◽

Ram B. Khadka ◽

Zhe Liu ◽

Fuqing Xu ◽

...

Keyword(s):

Carbon Source ◽

Sclerotinia Sclerotiorum ◽

Wheat Bran ◽

Carbon Sources ◽

Ethanol Solution ◽

Meloidogyne Hapla ◽

Root Knot Nematodes ◽

Soil Disinfestation ◽

Anaerobic Soil Disinfestation ◽

Muck Soil

Experiments were conducted to evaluate potential functional and mechanistic differences in the suppression of Sclerotinia sclerotiorum and S. minor and root-knot nematodes in muck soils by anaerobic soil disinfestation (ASD) using different carbon source amendments. Volatile compounds produced during ASD in muck soil amended with molasses, wheat bran, or mustard greens at 20.2 Mg/ha or a 2% ethanol solution significantly reduced the mycelial growth and number of sclerotia produced by both Sclerotinia spp. compared with the anaerobic control. In amended soils, acetic and butyric acids were detected in concentrations that reduced the viability of sclerotia of both pathogens. Higher concentrations of carbon dioxide were observed in ASD-treated soils, regardless of the amendment, than in the nonamended anaerobic control. Only amendment with wheat bran did not increase the production of methane gas during ASD compared with the controls. Meloidogyne hapla survival was completely suppressed in soils treated with ASD regardless of carbon source. Field trials were conducted in Ohio muck soil to assess survival of sclerotia of both Sclerotinia spp. The viability of sclerotia of both Sclerotinia spp. was significantly reduced in soil subjected to ASD amended with wheat bran (20.2 Mg/ha), molasses (10.1 Mg/ha), or wheat bran (20.2 Mg/ha) plus molasses (10.1 Mg/ha) compared with the controls. A consistent negative correlation between soil reduction and viability of sclerotia of both pathogens was observed. Wheat bran and molasses are both widely available amendments that can be used as ASD carbon sources for the management of soilborne pathogens in muck soils.

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Meloidogyne hapla, the Northern Root-Knot Nematode, in Florida Strawberries and Associated Double-Cropped Vegetables

EDIS ◽

10.32473/edis-in1224-2018 ◽

2019 ◽

Vol 2019 (1) ◽

Author(s):

Johan Desaeger

Keyword(s):

The State ◽

Extension Agents ◽

Crop Loss ◽

Meloidogyne Hapla ◽

Root Knot Nematode ◽

Root Knot Nematodes ◽

Fact Sheet ◽

Nematode Parasites ◽

And Behavior

Northern root-knot nematodes (Meloidogyne hapla) are rather uncommon nematode parasites of strawberries and vegetables in Florida, but when present they are capable of causing significant crop loss. Root-knot nematodes are largely unknown to strawberry growers in Florida and very little is known about their biology and behavior in the state. This 5-page fact sheet written by J. Desaeger and published by the UF/IFAS Department of Entomology and Nematology is intended to educate and provide information on this nematode to researchers, Extension agents, growers, industry representatives, and other stakeholders in the strawberry and vegetable community. http://edis.ifas.ufl.edu/in1224

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Host Status of Lisianthus `Mariachi Lime Green' for Three Species of Root-knot Nematodes

HortScience ◽

10.21273/hortsci.39.1.120 ◽

2004 ◽

Vol 39 (1) ◽

pp. 120-123 ◽

Cited By ~ 3

Author(s):

Martin Schochow ◽

Steven A. Tjosvold ◽

Antoon T. Ploeg

Keyword(s):

Nematode Species ◽

Meloidogyne Hapla ◽

Cut Flower ◽

Root Knot Nematode ◽

Eustoma Grandiflorum ◽

Root Knot Nematodes ◽

Tomato Plants ◽

Flower Production ◽

Significant Damage ◽

Host Status

Lisianthus [Eustoma grandiflorum (Raf.) Shinn.] plants were grown in soil infested with increasing densities of Meloidogyne hapla Chitwood, M. incognita (Kofoid & White) Chitwood, or M. javanica (Treub) Chitwood, root-knot nematodes. Compared to tomato plants grown in soil with the same nematode numbers and species, lisianthus had less severe root symptoms, suffered less damage, and resulted in lower nematode multiplication rates. Lisianthus was a better host for M. javanica than for M. incognita, and a poor host for M. hapla. Lisianthus shoot weights were significantly reduced after inoculation with M. javanica or M. hapla, but not after M. incognita inoculation. The number of flowers produced per lisianthus plant was reduced by all three nematode species. The results show that the root-knot nematode species that are most common in California may cause significant damage in the cut-flower production of lisianthus.

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