scholarly journals Plant parasitic nematodes fauna in citrus orchards in Khuzestan province, Southwestern Iran

2019 ◽  
Vol 12 (2) ◽  
pp. 97-107
Author(s):  
P. Eisvand ◽  
R. Farrokhi Nejad ◽  
S. Azimi
Keyword(s):  
Nematode Species ◽  
First Record ◽  
Parasitic Nematodes ◽  
Plant Parasitic Nematodes ◽  
Khuzestan Province ◽  
Tylenchulus Semipenetrans ◽  
Citrus Orchards ◽  
Southwestern Iran ◽  
Plant Parasitic ◽  
Nematode Fauna

Summary During a survey on the biodiversity of plant-parasitic nematodes in citrus orchards of Khuzestan province (Southwestern Iran), 97 root and soil samples were collected. Nematodes were extracted and identified using morphological and morphometric diagnostic characters. Six nematode species were identified, namely: Helicotylenchus abunaamai, H. crenacauda, Pratylenchus allius, P. musii, Psilenchus hilarulus and Tylenchulus semipenetrans. Except T. semipenetrans, the remaining five species were found only in the rhizosphere of citrus, not in citrus roots, and their pathogenicity on citrus plants was not further studied. This is the first record of P. allius and P. musii for the nematode fauna in Iran. H. crenacauda is a new record for the nematode fauna in the Khuzestan province and is reported for the first time in citrus orchards in Iran. To our knowledge, this is the first report of H. abunaamai in citrus orchards worldwide.

The distribution of Tylenchulus semipenetrans and other parasitic nematodes associated with citrus in northern Victoria

1978 ◽  
Vol 18 (90) ◽  
pp. 148 ◽  
Author(s):  
RH Brown
Keyword(s):  
Soil Samples ◽  
Parasitic Nematodes ◽  
Plant Parasitic Nematodes ◽  
Tylenchulus Semipenetrans ◽  
Citrus Orchards ◽  
Citrus Nematode ◽  
Plant Parasitic

Citrus orchards in the Cobram district of northern Victoria were surveyed in 1976 for the presence of plant parasitic nematodes; in particular for the citrus nematode Tylenchulus semipenetrans. One hundred and forty-six soil samples were collected from 38 orchards. Nine genera were recorded, the most prevalant being Tylenchulus and Paratrichodorus (95 per cent and 37 per cent respectively, of all samples). T. semipenetrans was present in all orchards sampled. Population levels of T. semipenetrans larvae exceeded 1000 per 500 g of soil in 60 per cent of samples.

scholarly journals The genus Basiria Siddiqi, 1959 (Nematoda: Tylenchidae) from Dezful region, Iran

2021 ◽  
Vol 13 (3) ◽  
pp. 18004-18010
Author(s):  
Manouchehr Hosseinvand ◽  
Ali Eskandari ◽  
Reza Ghaderi
Keyword(s):  
Body Length ◽  
Cephalic Region ◽  
Parasitic Nematodes ◽  
Plant Parasitic Nematodes ◽  
Morphometric Characters ◽  
Khuzestan Province ◽  
Basal Bulb ◽  
Southwestern Iran ◽  
First Time ◽  
Plant Parasitic

A survey was conducted during 2018 and 2019 in order to identify plant-parasitic nematodes of the genus Basiria in Dezful region of Khuzestan province, southwestern Iran.  Nematodes were extracted from the soil and root samples by using tray method, transferred to glycerin and mounted on permanent slides.  Nematodes were identified based on morphological and morphometric characters.  As a result, eight species including B. aberrans, B. duplexa, B. gracilis, B. jirians, B. tumida, B. graminophila, B. ritteri, and B. similis were identified; three species namely B. jirians, B. ritteri, and B. similis are here described and illustrated for the first time from Iran.  B. jirians is characterized by body length 445–535 µm, stylet 9.0–9.2 µm, cephalic region without annuli, DGO 2.0–2.5 µm, median bulb at anterior end of pharynx, basal bulb pyriform, spermatheca non offset and tail elongate conoid with pointed to filiform terminus.  B. ritteri can be characterized by body length 685–747 µm, stylet 10.5–11.5 µm, median bulb located at anterior half of pharynx, basal bulb cylindroid, spermatheca non offset and tail annulated and notched at tip.  B. similis is characterized by body length 644–736 µm, stylet 10.3–11 µm, DGO 8.9–10.5 µm, basal bulb cylindroid and tail clavate.

scholarly journals New records of plant-parasitic nematodes from Iceland

Polar Biology ◽  
2020 ◽  
Vol 43 (10) ◽  
pp. 1655-1661
Author(s):  
Łukasz Flis ◽  
Franciszek Wojciech Kornobis ◽  
Magdalena Kubicz ◽  
Jón Guðmundsson
Keyword(s):  
New Records ◽  
Plant Protection ◽  
Nematode Species ◽  
First Record ◽  
Molecular Data ◽  
Parasitic Nematodes ◽  
Plant Parasitic Nematodes ◽  
The Family ◽  
Nematode Biodiversity ◽  
Plant Parasitic

Abstract The plant-parasitic nematodes of Iceland are poorly understood. To address this, a study of the nematodes of the families Criconematidae and Hemicycliophoridae was performed in 2015. Soil samples were taken from underneath various host plants in different locations in Iceland. The identification was performed on the basis of the general morphology and subsequently confirmed by molecular markers (D2-D3 28S rDNA). The study revealed the presence of nematode specimens belonging to four species of the family Criconematidae: Criconemoides amorphus, Criconema demani, Mesocriconema xenoplax and Mesocriconema curvatum, as well as one species Hemicycliophora conida of the family Hemicycliophoridae. To our knowledge, this is the first record of the occurrence of these nematode species in Iceland. The species identified are economically important plant-parasitic nematodes of likely interest to—among others—Icelandic plant protection professionals. This report broadens our knowledge of Iceland’s nematode biodiversity; moreover, morphological analyses and molecular data may contribute to better understanding the origin of nematode species on the island of Iceland.

Distribution of plant parasitic nematodes in South Australian vineyards

1976 ◽  
Vol 16 (81) ◽  
pp. 588 ◽  
Author(s):  
GR Stirling
Keyword(s):  
Sandy Soil ◽  
Parasitic Nematode ◽  
Parasitic Nematodes ◽  
Wide Spread ◽  
Plant Parasitic Nematodes ◽  
Tylenchulus Semipenetrans ◽  
Meloidogyne Spp ◽  
Citrus Nematode ◽  
Almost All ◽  
Plant Parasitic

Vineyards in all five of South Australia's grapegrowing districts were surveyed for plant parasitic nematodes. Root-knot nematodes (Meloidogyne spp.) occurrcd in four districts, and were present in almost all vineyards with sandy soil in the Riverland, Barossa Valley and Central districts. Four species (M. arenaria, M. hapla, M. incognita and M. javanica) were identified. Citrus nematode (Tylenchulus semipenetrans) was wide-spread in Riverland vineyards, and isolated infestations were found in other districts. Other plant parasitic nematode genera found during the survey were Helicotylenchus, Macroposthonia, Paratrichodorus, Paratylenchus, Prat ylenchus, Tylenchorh ynchus and Xiphinema.

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

Resistance and tolerance of grapevine rootstocks to plant parasitic nematodes in vineyards in north-east Victoria

1989 ◽  
Vol 29 (1) ◽  
pp. 129 ◽  
Author(s):  
M Edwards
Keyword(s):  
Large Population ◽  
Parasitic Nematodes ◽  
Cabernet Sauvignon ◽  
Plant Parasitic Nematodes ◽  
Root Knot Nematode ◽  
North East ◽  
Tylenchulus Semipenetrans ◽  
Effect On Yield ◽  
Citrus Nematode ◽  
Plant Parasitic

Three grapevine rootstock trials in North-East Victoria, Australia, were sampled over several summers to determine nematode populations and the resistance or the tolerance of some commonly used winegrape varieties and rootstocks to plant parasitic nematodes. Rootstocks on which nematodes failed to reproduce or reproduced poorly were considered resistant, rootstocks which supported high populations of nematodes with no apparent effect on yield were considered tolerant. Susceptible rootstocks supported high numbers of nematodes and yielded poorly. The varieties studied were: Shiraz, Chardonnay, Cabernet Sauvignon; and the rootstocks were: Harmony, Richter 110, Schwarzmann, ARG No. 1, 5A Teleki, Rupestris du Lot, 5BB Kober, SO4, Ramsey, K5 1-32 and 1202. The plant parasitic nematodes found on the trial sites were root-knot (Meloidogyne javanica (Treub) Chitwood) and citrus (Tylenchulus semipenetrans Cobb) nematodes. Cabernet Sauvignon, Chardonnay, Shiraz and ARG No. 1 were susceptible to the root-knot nematode. Harmony exhibited tolerance to the citrus nematode and was a good host, allowing a large population to build up. Ramsey appeared to be resistant to the citrus nematode, at least in the Cabernet Sauvignon rootstock trial at Wahgunyah.

scholarly journals Molecular Characterization and Phylogenetic Relationships of Plant-Parasitic Nematodes Associated with Turfgrasses in North Carolina and South Carolina, United States

Plant Disease ◽  
2015 ◽  
Vol 99 (7) ◽  
pp. 982-993 ◽  
Author(s):  
Yongsan Zeng ◽  
Weimin Ye ◽  
James Kerns ◽  
Lane Tredway ◽  
Samuel Martin ◽  
...  
Keyword(s):  
North Carolina ◽  
South Carolina ◽  
Dna Sequences ◽  
Phylogenetic Relationships ◽  
Parasitic Nematode ◽  
Nematode Species ◽  
Plant Parasitic Nematode ◽  
Parasitic Nematodes ◽  
Plant Parasitic Nematodes ◽  
Plant Parasitic

The near-full-length 18S ribosomal DNA (rDNA) gene and internal transcribed spacer 1 region were amplified and sequenced from 52 nematode populations belonging to 28 representative species in 13 families recovered from turfgrasses in North Carolina (38 populations) and South Carolina (14 populations). This study also included 13 nematode populations from eight other plant hosts from North Carolina for comparison. Nematodes were molecularly characterized and the phylogenetic relationships were explored based on 18S rDNA sequences. Phylogenetic analysis using Bayesian inference was performed using five groups of the plant-parasitic nematode populations Tylenchids, Criconematids, Longidorids, Xiphinematids, and Trichodorids. The 65 nematode populations were clustered correspondingly within appropriate positions of 13 families, including Belonolaimidae, Caloosiidae, Criconematidae, Dolichodoridae, Hemicycliophoridae, Hoplolaimidae, Heteroderidae, Longidoridae, Meloidogynidae, Paratylenchidae, Pratylenchidae, Telotylenchidae, and Trichodoridae. This study confirms previous morphological-based identification of the plant-parasitic nematode species found in turfgrasses and provides a framework for future studies of plant-parasitic nematodes associated with turfgrasses based upon DNA sequences and phylogenetic relationships.

scholarly journals Use of Entomopathogenic Nematodes and Thyme Oil to Suppress Plant-Parasitic Nematodes on English Boxwood

Plant Disease ◽  
2006 ◽  
Vol 90 (4) ◽  
pp. 471-475 ◽  
Author(s):  
Enrique E. Pérez ◽  
Edwin E. Lewis
Keyword(s):  
Population Growth ◽  
Entomopathogenic Nematodes ◽  
Parasitic Nematode ◽  
Nematode Species ◽  
Plant Parasitic Nematode ◽  
Nematode Population ◽  
Parasitic Nematodes ◽  
Plant Parasitic Nematodes ◽  
Thyme Oil ◽  
Plant Parasitic

A 2-year experiment was conducted to test suppression of plant-parasitic nematodes on English boxwood using entomopathogenic nematodes and 3.5% thyme oil formulated as Promax. Treatments were Steinernema riobrave formulated as BioVector and S. feltiae formulated as Nemasys, both applied at a rate of 2.5 billion infective juveniles/ha, thyme oil at rate of 9.3 liters/ha, and nontreated control. In the 2001 season, treatment with S. feltiae reduced (P ≤ 0.05) the population growth of Tylenchorhynchus sp. 7 days after treatment and Hoplolaimus sp. 30 and 60 days after treatment. Treatment with S. riobrave reduced (P ≤ 0.05) the population growth of all plant-parasitic nematode species at all sampling dates, with the exception of Mesocriconema sp. 30 days after treatment and Tylenchorhynchus sp. and Rotylenchus buxophilus 60 days after treatment. Treatment with thyme oil reduced (P ≤ 0.05) the population growth of all plant-parasitic nematode genera at all sampling dates except Tylenchorhynchus sp. and R. buxophilus 60 days after treatment. In the 2002 season, treatment with S. feltiae had no effect on nematode population growth. Treatment with S. riobrave reduced (P ≤ 0.05) the population growth of R. buxophilus 7 days after treatment, and all plant-parasitic nematodes 30 and 60 days after treatment except Hoplolaimus sp. 30 days after treatment and Mesocriconema sp. 60 days after treatment. Treatment with thyme oil reduced (P ≤ 0.05) the population growth at all sampling dates of plant-parasitic nematodes except Mesocriconema sp. 60 days after treatment.

scholarly journals PLANT PARASITIC NEMATODES ASSOCIATED WITH RABBITEYE, SOUTHERN HIGHBUSH AND HIGHBUSH BLUEBERRIES

HortScience ◽  
1993 ◽  
Vol 28 (4) ◽  
pp. 264D-264
Author(s):  
John R. Clark ◽  
Robert Robbins
Keyword(s):  
Parasitic Nematode ◽  
Nematode Species ◽  
Vaccinium Corymbosum ◽  
Parasitic Nematodes ◽  
Small Populations ◽  
Plant Parasitic Nematodes ◽  
Total Plant ◽  
Highbush Blueberries ◽  
Southern Highbush ◽  
Plant Parasitic

Two replicated blueberry plantings, one containing one highbush, (Vaccinium corymbosum) two southern highbush and two rabbiteye (V.ashei) cultivars, and another containing one highbush and three rabbiteye cultivars were sampled in October, 1991 and plant parasitic nematodes extracted and counted. Additionally, 15 commercial rabbiteye plantings were sampled. Standard and southern highbush samples had total plant parasitic nematode levels of 228-451 nematodes/250 ml soil compared to 4-14 nematodes/250 ml soil for rabbiteye. No difference in nematode population was found among the standard highbush ('Bluecrop') and southern highbush ('Cooper', 'Gulfcoast') cultivars. Xiphinema americanum was the most common nematode species found, along with very small populations of Paratrichodorus minor. All commercial plantings had lower nematode levels in samples from the blueberry plants as compared to those from the sod middles between the rows. Nematode levels from commercial plantings ranged from 1477/250ml soil from blueberry plants and 11-1546/250 ml soil from the sod middles. Species found at high levels in the sod samples were usually distinctly different from those found associated with the blueberry plants.

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