scholarly journals Pasteuria penetrans suppression of root-knot nematode Meloidogyne arenaria race 1 in vegetables

2014 ◽  
Vol 38 (2) ◽  
Author(s):  
Faruk AKYAZI ◽  
Donald W. DICKSON
Keyword(s):  
Meloidogyne Arenaria ◽  
Pasteuria Penetrans ◽  
Root Knot Nematode ◽  
Race 1

scholarly journals Effect of continuous growing of resistant soybean genotypes on Meloidogyne arenaria race 1 reproduction

2001 ◽  
Vol 26 (1) ◽  
pp. 93-94 ◽  
Author(s):  
ELVIRA M.R. PEDROSA ◽  
ROMERO M. MOURA
Keyword(s):  
Glycine Max ◽  
Continuous Culture ◽  
Reproduction Rate ◽  
Meloidogyne Arenaria ◽  
Root Knot Nematode ◽  
Resistant Plant ◽  
Nematode Management ◽  
Soybean Genotypes ◽  
Race 1

Even though resistance is the most promising tactic for root-knot nematode management on soybean (Glycine max), virulent biotypes may occur and be selected on specific resistant plant genotypes. In the present study, reproduction rate of Meloidogyne arenaria race 1 increased after four sequences of continuous culture of the parasite on resistant soybean genotypes.

The effect of sandy soil, bacterium dose and time on the efficacy of Pasteuria penetrans to control Meloidogyne incognita race 1 on coffee

Nematology ◽  
2007 ◽  
Vol 9 (6) ◽  
pp. 845-851 ◽  
Author(s):  
Maria Célia Cordeiro ◽  
Regina Carneiro ◽  
Pedro Cirotto ◽  
Luiz de Mesquita ◽  
Maria Ritta Almeida ◽  
...  
Keyword(s):  
Biological Control ◽  
Sandy Soil ◽  
Meloidogyne Incognita ◽  
Pasteuria Penetrans ◽  
Root Knot Nematode ◽  
Nematode Reproduction ◽  
Second Stage ◽  
Race 1 ◽  
Coffee Plants ◽  
Reproduction Factor

AbstractAn obligate parasite bacterium of the root-knot nematode, Pasteuria penetrans strain P10, isolated from Meloidogyne incognita females on banana roots in Imperatriz Maranhão State, Brazil, was evaluated in glasshouse conditions, using two doses of a dry root bionematicide (107 endospores (5.0 g/seedling) and 106 endospores (0.5 g/seedling)) on seedlings of cv. Mundo Novo coffee. The soil in which coffee seedlings were raised was inoculated previously with these two doses of P. penetrans and after 2 months the plants were transferred to soils of different textures: clay-sandy soil (38% clay, 2% silt and 60% sand) and sandy soil (17% clay, 0% silt and 83% sand). When the coffee plants were 30 cm high, they were inoculated with 20 000 eggs/plant of M. incognita race 1. The coffee plants were examined 8, 16 and 24 months after nematode plant infestation. The effectiveness of the biological control was determined by the reduction of nematode reproduction factor, which ranged from 62 to 67% in clay-sandy soil and 80 to 85% in sandy soil. The mechanism of suppression caused by the bacterium was evaluated by the percentage of infected second-stage juveniles (J2), number of endospores attached/J2 and number of infected females. The high levels of suppression were related to time, increasing from 8 to 24 months, and to the percentage of sand in the soil.

scholarly journals Characterization of Resistance Conferred by the N gene to Meloidogyne arenaria Races 1 and 2, M. hapla, and M. javanica in Two Sets of Isogenic Lines of Capsicum annuum L.

2000 ◽  
Vol 125 (1) ◽  
pp. 71-75 ◽  
Author(s):  
Judy A. Thies ◽  
Richard L. Fery
Keyword(s):  
Capsicum Annuum ◽  
Nematode Resistance ◽  
N Gene ◽  
Recurrent Parent ◽  
Resistance Locus ◽  
Meloidogyne Arenaria ◽  
Meloidogyne Hapla ◽  
Root Knot Nematode ◽  
Race 1 ◽  
Race 2

Two isogenic sets of bell pepper (Capsicum annuum L.) lines (differing at the N root-knot nematode resistance locus) were characterized for resistance to Meloidogyne arenaria (Neal) Chitwood races 1 and 2, M. hapla Chitwood, and M. javanica (Treub) Chitwood in greenhouse and growth chamber tests. The isogenic sets of C. annuum were `Charleston Belle' (NN) and `Keystone Resistant Giant' (nn-recurrent parent), and `Carolina Wonder' (NN) and `Yolo Wonder B' (nn-recurrent parent). Meloidogyne arenaria race 1 is pathogenic to C. annuum. `Charleston Belle' and `Carolina Wonder' exhibited high resistance to M. arenaria race 1. Their respective recurrent backcross parents, `Keystone Resistant Giant' and `Yolo Wonder B', were susceptible to M. arenaria. Meloidogyne arenaria race 2 and M. javanica are not highly pathogenic to pepper. However, `Charleston Belle' and `Carolina Wonder' both exhibited higher (P≤0.05) resistance to M. arenaria race 2 and M. javanica than `Keystone Resistant Giant' and `Yolo Wonder B'. Meloidogyne hapla is pathogenic to pepper. Both `Charleston Belle' and `Carolina Wonder' and their respective recurrent parents, `Keystone Resistant Giant' and `Yolo Wonder B', were susceptible to M. hapla. We concluded that the N gene confers resistance to M. arenaria races 1 and 2, and M. javanica in C. annuum, but the N gene does not condition resistance to M. hapla.

scholarly journals Genetic Analysis of Meloidogyne arenaria Race 1 Resistance in Tobacco

Plant Disease ◽  
1999 ◽  
Vol 83 (9) ◽  
pp. 810-813 ◽  
Author(s):  
Tenson B. S. Ng'ambi ◽  
Rebeca C. Rufty ◽  
Kenneth R. Barker
Keyword(s):  
Dominant Gene ◽  
Meloidogyne Arenaria ◽  
Block Designs ◽  
Inheritance Of Resistance ◽  
Root Knot Nematode ◽  
Breeding Lines ◽  
Race 1 ◽  
Relationship Of ◽  
Resistant Genotypes ◽  
G 28

Inheritance of resistance to the peanut root-knot nematode (Meloidogyne arenaria (Neal) Chitwood race 1) was investigated in the flue-cured tobacco cv. Speight G 28 and the breeding lines 81-RL-2K and SA 1214. The genetic relationship of this resistance in Speight G 28 to the resistance of the same cultivar to races 1 and 3 of M. incognita was also studied. Crosses were made between the root-knot nematode-susceptible flue-cured tobacco cv. NC 2326 and the three resistant genotypes. Parental, F1, F2 and backcross generations (BC1P1, BC1P2) were grown for each cross in randomized complete block designs with five replications in the greenhouse. Data indicated that resistance to M. arenaria race 1 in the three resistance sources is conditioned by a single dominant gene, but this resistance is partial compared to that for M. incognita races 1 and 3. Further, resistance to races 1 and 3 of M. incognita and resistance to M. arenaria race 1 in cv. Speight G 28 appear to be controlled by the same gene. These results, combined with the absence of segregation in the F2 populations of the crosses between resistant parents 81-RL-2K × SA 1214, 81-RL-2K × Speight G 28, and SA 1214 × Speight G 28, suggest allelism of resistance among these genotypes.

scholarly journals First Report of the Root-Knot Nematode Meloidogyne arenaria Race 2 from Several Vegetable Crops in Jordan

Plant Disease ◽  
2005 ◽  
Vol 89 (2) ◽  
pp. 206-206 ◽  
Author(s):  
M. Karajeh ◽  
W. Abu-Gharbieh ◽  
S. Masoud
Keyword(s):  
North Carolina ◽  
Meloidogyne Arenaria ◽  
Vegetable Crops ◽  
Root Knot Nematode ◽  
Lateral Field ◽  
Differential Host ◽  
First Report ◽  
Race 1 ◽  
Meloidogyne Spp ◽  
Race 2

Meloidogyne arenaria (Neal) Chitwood (race 2) is reported for the first time in Jordan. The nematode populations were recovered from several vegetable crops, including tomato (Lycopersicon esulentum Mill), squash (Cucurbita pepo L.), cucumber (Cucumis sativus L.), and bean (Phaseolus vulgaris L.), at Dier Alla in the northern area of the Jordan Valley. Symptoms included root galling, leaf chlorosis, and stunting. Galled plant root samples were collected during a survey conducted from May 2002 to August 2003 covering most of the irrigated agricultural areas of Jordan. Eighty-three Meloidogyne spp. populations were collected from various vegetable crops and fruit trees. Identification to species and race levels of the nematode populations was based on combination of currently available methods including nematode morphology, host preference based on the North Carolina (NC) differential host test (1), and cytogenetics and DNA-fingerprinting. Seventy of the eighty-three collected populations were identified as M. javanica, five as M. incognita (race 1), three as M. incognita (race 2), and five as M. arenaria (race 2). The perineal patterns of M. arenaria were characterized by a low, round to indented dorsal arch near the lateral field with irregular forks in the lateral field, fine smooth striae, and a distinct whorl. Race 2 was identified with the NC differential host test. Cytogenetic studies indicated that M. arenaria populations were triploid with an average of 52.2 chromosomes, while the populations of M. incognita (race 1), M. incognita (race 2), and M. javanica were hypotriploid with an average of 45.2, 46.1, and 46.7 chromosomes, respectively. Two polymerase chain reaction (PCR)-based assays were used to confirm species identification and to study genetic variability of the Meloidogyne spp. populations including sequence characterized amplified regions (SCAR) and random amplified polymorphic DNA (RAPD). In the SCAR-PCR-based assay (2), typical DNA products of 420, 670, or 1,200 bp in size were amplified by using extracted DNA of M. arenaria (race 2), M. javanica, or M. incognita (race 1 or 2), respectively, as template DNA. The RAPD-PCR primer, OPA-01, produced DNA patterns with bands that clearly distinguished M. arenaria from the other two Meloidogyne spp. To our knowledge, this is the first report of the root-knot nematode, M. arenaria race 2, in Jordan. References: (1) A. Taylor and J. Sasser, North Carolina State University Graphics, Raleigh, NC, 1978. (2) C. Zijlstra et al. Nematology 2:847, 2000.

Root-knot Nematode Resistance in Arachis Glabrata1

1986 ◽  
Vol 13 (2) ◽  
pp. 78-80 ◽  
Author(s):  
D. D. Baltensperger ◽  
G. M. Prine ◽  
R. A. Dunn
Keyword(s):  
Plant Sample ◽  
Egg Mass ◽  
Soil Nematode ◽  
Meloidogyne Arenaria ◽  
Forage Production ◽  
Root Knot Nematode ◽  
Root Knot Nematodes ◽  
Arachis Glabrata ◽  
Race 1 ◽  
Rhizoma Peanut

Abstract Peanut root-knot nematode (Meloidogyne arenaria race 1) is an important pest of cultivated peanuts (Arachis hypogaea L.). Experimental data do not exist, however, to indicate whether this nematode might be a potential pest of peanuts grown for forage production. Florigraze and Arbrook, two recently released cultivars of rhizoma peanut (Arachis glabrata Benth.) and P.I. 446898 (Arachis spp.) with perennial forage potential, were evaluated for their interaction with M. arenaria race 1, M. javanica, and M. incognita races I and III. Individual plants, grown in 150 cm3 ConetainersR, were inoculated with 3,000 eggs of one of the four Meloidogyne spp. populations. After three months gall and egg mass scores and soil-nematode counts were determined for each plant sample. A second long-term experiment evaluated Florigraze that was repeatedly inoculated with high levels of root-knot nematodes. Both rhizoma peanut cultivars were highly resistant to all root-knot nematodes tested; Florigraze appeared to be immune. P.I. 446898 was intermediate between the rhizoma peanuts and the susceptible alyceclover check. This is the first known report of such high levels of Meloidogyne arenaria resistance in Arachis spp. Further screending of A. hypogaea material can be justified based on these results and Vavilov's “Law of homologous series”. If no resistance is found in A. hypogaea, A. glabrata may provide a source of resistance that may be transferred to A. hypogea through hybridization.

Reactions of lines of Phaseolus atropurpureus to four species of root-knot nematode

1972 ◽  
Vol 23 (4) ◽  
pp. 623
Author(s):  
EM Hutton ◽  
WT Williams ◽  
LB Beall
Keyword(s):  
Lycopersicon Esculentum ◽  
Differential Resistance ◽  
Meloidogyne Arenaria ◽  
Root Knot Nematode ◽  
Root Knot Nematodes ◽  
Increased Susceptibility

In each of two years the reactions of 36 lines of Phaseolus atropurpureus to the four root-knot nematodes Meloidogyne arenaria, M. hapla, M. incognita, and M. javanica were studied. Seven of the experimental lines were common to the two years. Two known susceptible species, Phaseolus lathyroides and Lycopersicon esculentum (tomato cv. Grosse Lisse), were used as controls. Four macroscopic and four microscopic reactions were recorded on each occasion, and the results analysed. Resistance to the four nematodes was present in all lines of P. atropurpureus. There was also evidence of differential resistance between lines; some showed increased resistance to all nematodes except M. hapla, and others showed both increased susceptibility to M. hapla and increased resistance to M. javanica. The severity of attack on thc controls was significantly less in the second ycar. Several explanations for this are advanced.

Sources of resistance to Fusarium wilt and root-knot nematode in indigenous chickpea germplasm

2012 ◽  
Vol 10 (3) ◽  
pp. 258-260 ◽  
Author(s):  
Mohar Singh ◽  
Z. Khan ◽  
Krishna Kumar ◽  
M. Dutta ◽  
Anju Pathania ◽  
...  
Keyword(s):  
Fusarium Wilt ◽  
Rating Scale ◽  
Resistance Breeding ◽  
Practical Method ◽  
Root Knot Nematode ◽  
Sources Of Resistance ◽  
Chickpea Wilt ◽  
Breeding Programmes ◽  
Race 1 ◽  
Moderately Resistant

Fusarium wilt caused by Fusarium oxysporum, Schlecht. emend. Snyd. & Hans. f. sp. ciceri is prevalent in most chickpea-growing countries and is a major devastating disease. Host plant resistance is the most practical method of disease management. Indigenous chickpea germplasm reveals a heterogeneous genetic make-up and the response of resistance to wilt is an unexplored potential source for disease resistance. There are 70 indigenous germplasm lines selected on the basis of their agronomic performance and diverse areas of collections in the country. Of these, four accessions had a highly resistant score of 1 and six had a score of 3 using a 1–9 rating scale, indicating their level of resistance to Fusarium wilt (race 4). Other germplasm accessions of chickpea were found to be moderately resistant to highly susceptible disease reaction. Likewise, the same set of germplasm was also screened for Meloidogyne incognita (race 1) using pot culture under controlled condition. Only one accession was found to be resistant to this pest. These resistant gene sources can be utilised effectively for race-specific chickpea wilt and root-knot resistance breeding programmes.

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