Lavandula angustifolia and Oxalis pes-caprae, hosts of Meloidogyne hapla and Meloidogyne javanica - A note for Meloidogyne luci in Greece

2020 ◽  
Vol 13 (2) ◽  
pp. 78-82
Author(s):  
A.R. Gonçalves ◽  
I.L. Conceição ◽  
M. Kormpi ◽  
E.A. Tzortzakakis
Keyword(s):  
Host Range ◽  
Meloidogyne Javanica ◽  
Nematode Species ◽  
Mediterranean Area ◽  
Electrophoretic Analysis ◽  
Vegetable Crops ◽  
Meloidogyne Hapla ◽  
Lavandula Angustifolia ◽  
The Past ◽  
Two Populations

SummaryRoot-knot nematodes (RKN), Meloidogyne spp., have a wide host range and are common in the Mediterranean area. Cultivated lavender (Lavandula angustifolia) was found naturally infested by M. hapla in Kozani area, the first documented infestation of this crop by RKN in Greece. Oxalis pescaprae, a common winter weed in Crete, was found to be a host of M. javanica under artificial inoculation. This weed acts as a potential winter host of the nematode in fields cultivated with vegetable crops. Two populations of M. ethiopica were found in kiwi and maize in Greece in the past. Recently, populations of M. ethiopica from Europe were re-classified as M. luci, based only on the population isolated from kiwi for Greece. In the current work, the RKN populations originating from kiwi and maize and maintained on tomato, were identified as M. luci. Nematode species identification was determined by electrophoretic analysis of protein extracts obtained from females.

scholarly journals Characterization of Root-Knot Nematode Populations Associated with Vegetables in New York State

Plant Disease ◽  
2002 ◽  
Vol 86 (8) ◽  
pp. 840-847 ◽  
Author(s):  
N. A. Mitkowski ◽  
J. G. Van der Beek ◽  
G. S. Abawi
Keyword(s):  
New York ◽  
Host Range ◽  
New York State ◽  
Nematode Species ◽  
Meloidogyne Hapla ◽  
Root Knot Nematode ◽  
Internal Transcribed Spacer Region ◽  
York State ◽  
The North ◽  
Significant Damage

The northern root-knot nematode (Meloidogyne hapla) causes significant damage on vegetables in New York State. This study was conducted to determine if other species of Meloidogyne are also present in New York vegetable fields and to better characterize the root-knot populations in order to facilitate the development of effective rotations for nematode management. Populations of Meloidogyne were collected from 18 vegetable fields across New York and maintained in the greenhouse on tomato cv. Rutgers as both field populations and single-female populations. For the purposes of species identification, nematodes from each population were examined using perineal pattern analysis, scanning electron microscopy, and cytological analysis. All techniques identified the presence of only Meloidogyne hapla in the collected samples. The host range of the populations of Meloidogyne that were collected was investigated using a modified form of the North Carolina Differential Host Test. While host ranges were variable among the collected populations, the host range of all populations closely corresponded to that of M. hapla. The internal transcribed spacer region (ITS1) of the collected populations was amplified and sequenced. All sequences from the collected populations corresponded to the published sequence of M. hapla. Based on these results, it was concluded that M. hapla is the only root-knot nematode species present in New York vegetable fields. Crop rotational strategies for management of the root-knot nematode on vegetables in New York should be devised to reflect this fact.

scholarly journals Occurrence of the Root-Knot Nematode Meloidogyne hapla in the Czech Republic

Plant Disease ◽  
2003 ◽  
Vol 87 (1) ◽  
pp. 98-98
Author(s):  
M. Zouhar ◽  
P. Rysanek ◽  
B. Tesarova
Keyword(s):  
Czech Republic ◽  
Economic Losses ◽  
Vegetable Crops ◽  
Meloidogyne Hapla ◽  
Root Knot Nematode ◽  
Chain Reaction ◽  
Causal Organism ◽  
The Czech Republic ◽  
The Past ◽  
Polymerase Chain

Meloidogyne hapla was detected in several commercial vegetable fields in the Province of Central Bohemia in the Czech Republic. Crops grown in the area of infestation include leek, onion, cauliflower, early potatoes, and carrot. During the past 2 to 3 years, growers have observed typical symptoms of Meloidogyne infection as stunting and galls on roots of carrot. Identification of the causal organism was based on microscopic observation of the perineal patterns of females obtained from root galls and polymerase chain reaction (1,2). Known isolates of M. chitwoodi, M. arenaria, M. javanica, M. incognita, and M. fallax from M. Phillips (SCRI, Dundee) and C. Zijlstra (PRI, Wageningen), and M. hapla from M. Liskova (PI, Kosice) were used as controls. M. hapla was identified in galled roots using both methods. Several fields with carrots were inspected in the area during vegetation in 2000 and 2001. In most fields, only isolated and limited outbreaks occurred, but recently, we observed a widespread and fairly homogeneous occurrence of root knot attributed to M. hapla in a 2-ha field. This nematode may become a more widespread and damaging pest, especially of carrot, in the Czech Republic. Other than carrot, vegetable crops grown in the area and tested in the greenhouse and field in soil highly infested by our isolates of M. hapla had no visible symptoms of infection. Therefore, exclusion of carrot cultivation or a longer crop rotation is recommended to minimize economic losses to growers. To our knowledge, this is the first report of the occurrence of M. hapla in the Czech Republic. References: (1) T. S. Harris et al. J. Nematol. 22:518, 1990. (2) C. Zijlstra et al. Genetics 85:1231, 1995.

scholarly journals Parasitic nematodes of Pool Frog (Pelophylax lessonae) in the Volga Basin

2019 ◽  
pp. 7314-7321
Author(s):  
Alexander Ruchin ◽  
Igor V. Chikhlyaev ◽  
Alexander I. Fayzulin
Keyword(s):  
Life Cycle ◽  
Host Range ◽  
Nematode Species ◽  
Systematic Position ◽  
Volga Basin ◽  
Parasitic Nematodes ◽  
The Past ◽  
First Time ◽  
Cosmocerca Ornata

Objetive. Present a modern review of the nematodes fauna of the pool frog Pelophylax lessonae (Camerano, 1882) from Volga basin populations on the basis of our own research and literature sources analysis. Materials and methods. Present work consolidates data from different helminthological works over the past 80 years, supported by our own research results. During the period from 1936 to 2016 different authors examined 1460 specimens of pool frog, using the method of full helminthological autopsy, from 13 regions of the Volga basin. Results. In total 9 nematodes species were recorded. Nematode Icosiella neglecta found for the first time in the studied host from the territory of Russia and Volga basin. Three species appeared to be more widespread: Oswaldocruzia filiformis, Cosmocerca ornata and Icosiella neglecta. For each helminth species the following information included: systematic position, areas of detection, localization, biology, list of definitive hosts, the level of host-specificity. Conclusions. Nematodes of pool frog, excluding I. neglecta, belong to the group of soil-transmitted helminthes (geohelminth) and parasitize in adult stages. Some species (O. filiformis, C. ornata, I. neglecta) are widespread in the host range. The latter two are able to reach high invasion indices and also to be the background parasites of the pool frog. It happens due to these nematode species life cycle specificity and the long-term connection of the amphibian with water.

scholarly journals Golovinomyces longipes (Noordel. & Loer.) L. Kiss on Matricaria chamomilla L.: another host range expansion

2021 ◽  
Author(s):  
M. Götz ◽  
U. Braun
Keyword(s):  
Sequence Analysis ◽  
Powdery Mildew ◽  
Host Range ◽  
Dna Sequence ◽  
Range Expansion ◽  
Matricaria Chamomilla ◽  
Important Family ◽  
The Past ◽  
Morphological Studies ◽  
Host Range Expansion

AbstractGolovinomyces longipes is a widespread powdery mildew on Solanaceae (Nicotiana, Petunia and Solanum spp.). In the past, it has been reported only once on Verbena (Verbenaceae), a non-solanaceaous host. Recently, this powdery mildew has been found on the composite Matricaria chamomilla. The identification of the powdery mildew species on this unusual host has been proved by morphological studies and DNA sequence analysis. Both datasets coincide with the characteristic data for G. longipes on Solanaceae. First inoculation experiments with further composites resulted in an infection of Brachyscome hybrid ‘Surdaisy’. To our knowledge, this is the first report of G. lonigpes on hosts belonging to the important family of Asteraceae and an additional proof of the broader host range of G. longipes beyond the Solanaceae.

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

Nematology ◽  
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.

scholarly journals A check list of the helminths of guineafowls (Numididae) and a host list of these parasites

2007 ◽  
Vol 74 (4) ◽  
Author(s):  
K. Junker ◽  
J. Boomker
Keyword(s):  
Host Range ◽  
Nematode Species ◽  
Reference List ◽  
Helminth Parasites ◽  
Check List ◽  
Cestode Species ◽  
Numida Meleagris ◽  
Single Genus ◽  
Host List

Published and personal records have been compiled into a reference list of the helminth parasites of guineafowls. Where data on other avian hosts was available these have been included for completeness' sake and to give an indication of host range. The parasite list for the Helmeted guineafowls, Numida meleagris, includes five species of acanthocephalans, all belonging to a single genus, three trematodes belonging to three different genera, 34 cestodes representing 15 genera, and 35 nematodes belonging to 17 genera. The list for the Crested guineafowls, Guttera edouardi, contains a single acanthocephalan together with 10 cestode species belonging to seven genera, and three nematode species belonging to three different genera. Records for two cestode species from genera and two nematode species belonging to a single genus have been found for the guineafowl genus Acryllium. Of the 70 helminths listed for N. meleagris, 29 have been recorded from domestic chickens.

Coastal dune mobility over the past century: A global review

2020 ◽  
Vol 44 (6) ◽  
pp. 814-836 ◽  
Author(s):  
Jinjuan Gao ◽  
David M Kennedy ◽  
Teresa M Konlechner
Keyword(s):  
Human Activities ◽  
Vegetation Cover ◽  
Dominant Role ◽  
Coastal Dunes ◽  
Mediterranean Area ◽  
Global Scale ◽  
Coastal Dune ◽  
Sediment Supply ◽  
Past Century ◽  
The Past

The mobility of coastal dunes is characterised by bio-geomorphological responses related to change in boundary conditions, particularly sediment supply, wind and vegetation cover, as well as human activities. There remains uncertainty regarding the relative importance of these drivers on dune mobility at a global scale. In this study, trends and dominant drivers of coastal dune mobility are synthesised through the literature review focusing on shifts in dune mobility over the last century (1870–2018). In total, 176 individual dunes, with 55 dunes from the Europe-Mediterranean area, 23 from Africa, 30 from North America, 23 from South America, 20 from Oceania and 23 from Asia, are reviewed in this work. The results show that there is a worldwide trend of dune stabilisation, with 93% (164 out of 176) of the reviewed sites showing a loss of bare sand area due to an increase in vegetation cover and urbanisation expansion. Multiple factors have contributed to the stabilisation process, including (a) land-use change such as the change of traditional farming practises, coastal urbanisation and tourism development; (b) dune stabilisation projects; (c) sediment decline caused by the riverine and coastal constructions; and (d) change in climate (i.e. the decrease in windiness, and the increase in temperature and rainfall) and storms. Our results suggest human intervention played a dominant role in altering dune mobility for most dunes during the past century, while climate and storms are also important drivers, especially for dune sites with limited human activities.

scholarly journals Five Species of Plant Parasitic Nematodes (Order: Tylenchidae) Affecting Vegetable Crops of Nepal

2016 ◽  
Vol 10 (1) ◽  
pp. 10-14
Author(s):  
Arvind K. Keshari ◽  
Ranjana Gupta
Keyword(s):  
Life Sciences ◽  
Nematode Species ◽  
Parasitic Nematodes ◽  
Kathmandu Valley ◽  
Vegetable Crops ◽  
Plant Parasitic Nematodes ◽  
Morphometric Data ◽  
First Time ◽  
Plant Parasitic

During a survey for plant parasitic nematodes affecting various vegetable crops grown in three hilly districts surrounding Kathmandu Valley, Nepal, five species of order Tylenchidae are reported for the first time from Nepal.The nematode species are Hoplolaimus indicus, Tylenchorhynchus mashhoodi, Helicotylenchus incisus, Microposthonia paraxestis and Hemicriconemoides cocophilus.All the species are illustrated with line diagrams and described with their morphometric data along with localities and host plants.International Journal of Life Sciences 10 (1) : 2016; 10-16

Kinematic reconstructions of the Western Mediterranean area since Triassic time: possible scenarios and their implications for the Apennines

2020 ◽  
Author(s):  
Eline Le Breton
Keyword(s):  
Tectonic Evolution ◽  
Driving Forces ◽  
Tectonic Setting ◽  
Mediterranean Area ◽  
Magnetic Anomalies ◽  
Western Mediterranean ◽  
Plate Boundaries ◽  
The Past ◽  
The North ◽  
Kinematic Evolution

<p>The Western Mediterranean-Alpine belt is remarkable for its tectonic complexity, i.e. strong arcuation of plate boundaries, fast trench retreat, upper-plate extension and switch of subduction/collision polarity around the Adriatic plate (Adria). The kinematic evolution of the Western Mediterranean area is enigmatic due to the intermittently motion of small continental plates (Adria, Iberia and Sardinia-Corsica) that are caught between two major plates (Africa and Europe), converging since Cretaceous time. Reconstructing the past motion of these micro-plates is challenging due to the strong deformation of their boundaries but is key to understand the geodynamic evolution of the whole area.</p><p>The Neogene tectonic evolution is well constrained using magnetic anomalies and transform zones in the Atlantic Ocean for the motion of Europe, Iberia and Africa, and by reconstructing the amount of convergence along fold-and-thrust belts (Apennines, Alps, Dinarides, Provence) and coeval divergence along extensional basins (Liguro-Provencal and Tyrrhenian basins, Sicily Channel Rift Zone) for the motion of Adria and Sardinia-Corsica. Those reconstructions show that Adria had a slight independent motion from Africa and rotated counter-clockwise of about 5º relative to Europe since 20 Ma. However, uncertainties increase and debates arise as one goes back in time. The main debates concern the past motion of Iberia and where its motion relative to Europe is being accommodated in Mesozoic time. Different kinematic scenarios have been proposed depending on the interpretation of paleomagnetic dataset of Iberia, magnetic anomalies in the North Atlantic, and geological-geophysical record of deformation in the Pyrenees and between Iberia and Sardinia-Corsica. Those scenarios have different implications for the tectonic evolution of the Apennines, especially for the Permian-Triassic paleo-tectonic setting of Sardinia, Calabria and Adria, and for the extent and timing of closure of the Liguro-Piemont Ocean. It is important to discuss those implications to better understand subduction processes in the Apennines and their driving forces.</p>

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