Host-status of selected South African commercial potato cultivars to Meloidogyne incognita and Meloidogyne javanica

2017 ◽  
Vol 18 (2) ◽  
pp. 270 ◽  
Author(s):  
K. M. Pofu ◽  
P. W. Mashela
Keyword(s):  
South African ◽  
Meloidogyne Incognita ◽  
Meloidogyne Javanica ◽  
Potato Cultivars ◽  
Commercial Potato ◽  
Host Status

scholarly journals The host status of glyphosate-tolerant soybean genotypes to Meloidogyne incognita and Pratylenchus infection

2021 ◽  
Author(s):  
Akhona Mbatyoti ◽  
Annelie De Beer ◽  
Mieke Stefanie Daneel ◽  
Antoinette Swart ◽  
Mariette Marais ◽  
...  
Keyword(s):  
South African ◽  
Meloidogyne Incognita ◽  
Crop Production ◽  
Second Stage ◽  
Final Population ◽  
Soybean Genotypes ◽  
Host Status ◽  
Maximum Temperatures ◽  
Production Areas

AbstractThe host status of South African adapted, genetically modified (GM) glyphosate-tolerant soybean genotypes to root-knot (field and glasshouse) and lesion (field) nematodes were assessed. Analyses of root and soil samples of 29 genotypes (collected from seven production areas during the 2014/15 season) enabled the identification of nine plant-parasitic nematode genera and 10 species. Predominant endoparasitic genera in root samples were Meloidogyne (Meloidogyne incognita and M. javanica) and Pratylenchus (Pratylenchus brachyurus, P. zeae and P. teres). Rotylenchulus parvus was the predominant semi-endoparasite in soil, followed by Scutellonema brachyurus and Helicotylenchus sp. Only ‘PAN 1583 R’ and ‘PAN 1521 R’ maintained less than 10% of the Meloidogyne spp. densities present in roots of the most susceptible genotype, while all genotypes were susceptible to the Pratylenchus spp. The host status of 36 soybean genotypes to M. incognita infection, evaluated in two follow-up glasshouse experiments terminated 56 days after inoculation of ca. 1000 M. incognita eggs and second-stage juveniles (J2) per seedling, varied substantially for final population density (Pf), reproduction factor (Rf) and relative percentage susceptibility (%S). Only ‘PRF-GCI7’ and the resistant reference ‘LS 5995’ had Rfs < 1 for both experiments, despite higher minimum and maximum temperatures recorded for the second experiment. Continuous evaluation of soybean genotypes for their host status to predominant nematode pests and their use to reduce densities of such species in producer’s fields are crucial to enable sustainable crop production, and contribute towards food provision and security.

scholarly journals Nematóides associados a plantas invasoras

1976 ◽  
Vol 33 (0) ◽  
pp. 597-615 ◽  
Author(s):  
Antonio Carlos Zem ◽  
Luiz Gonzaga E. Lordello
Keyword(s):  
Meloidogyne Incognita ◽  
Meloidogyne Javanica ◽  
Meloidogyne Arenaria ◽  
Pratylenchus Brachyurus ◽  
Pratylenchus Zeae

O presente trabalho trata de nematóides associados a raízes de 71 plantas invasoras, nas quais revelou-se a presença de 8 gêneros e 18 espécies parasitas. As espécies, pela ordem decrescente de freqüência foram: Helicotylenchus dihystera (46%) ; Meloidogyne javanica (24%) ; Meloidogyne incognita (23%); Macroposthonia ornata (17%); Pratylenchus brachyurus (16%) ; Pratylenchus zeae (14%) ; Xiphinemaseiariae (11%); Xiphinema krugi (10%); Helicotylenchus pseudorobustus (5,6%); Meloidogyne arenaria (4,2%); Helicotylenchus dUiysteroides (4,2%) ; Tylenchorhynchus martini (4,2%) ; Aphelenchoides sp. (2,8%) ; Ditylenchus sp. (2,8%) ; Helicotylerfichus microcephalus (2,8%) ; Xiphinema elongatum (2,8%) ; Helicotylenchus egyptiensis (1,4%) e Meloidogyne coffeicola (1,4%). São feitas considerações sobre as implicações para a agricultura de tão ampla distribuição de nematóides em plantas colonizadoras e gramíneas utilizadas como forrageiras.

Invasion, development, growth and egg laying by Meloidogyne javanica in Brassicaceae crops

Nematology ◽  
2001 ◽  
Vol 3 (5) ◽  
pp. 463-472 ◽  
Author(s):  
John Kirkegaard ◽  
Rod McLeod ◽  
Christopher Steel
Keyword(s):  
Intermediate Host ◽  
Subterranean Clover ◽  
Meloidogyne Javanica ◽  
Mature Female ◽  
Egg Laying ◽  
Field Pea ◽  
Crop Species ◽  
Egg Masses ◽  
Brassicaceae Species ◽  
Host Status

AbstractInvasion, development and egg laying by Meloidogyne javanica in 11 Brassicaceae and four non-Brassicaceae crop species/subspecies was investigated. At 10 to15 and 15 to 20°C, fodder rape cv. Rangi was invaded less than the good hosts tomato cv. Grosse Lisse and field pea cv. Dun but more than the poor host oat cv. Cooba. With an inoculum of 50 second stage juveniles (J2), invasion of Rangi, and the intermediate host subterranean clover cv. Trikkala, were similarly invaded when inoculated with 50 and 100 J2, cv. Rangi was invaded less than tomato. The intermediate host subterranean clover cv. Trikkala and Rangi were similarly invaded when inoculated with 50 and 100 J2 but cv. Trikkala was less invaded with 200 J2. Oat cv. Cooba was always less invaded than the other hosts. Invasion of 3-week-old seedlings of cv. Rangi and 12 cultivars of seven other Brassicaceae crop species/subspecies were similar. Three weeks after inoculation, more M. javanica had developed to the mature female stage in tomato than in the eight Brassicaceae species/subspecies. Females growing in tomato and field pea were always larger than those in rape cv. Rangi. Females in Rangi were larger but those in oilseed radish cv. Adagio were smaller than in 11 other cultivars of seven Brassicaceae, except in plants grown in winter. Egg masses from four Brassicaceae species contained fewer eggs than egg masses from tomato at 6 weeks after inoculation, but at 7 and 8 weeks only those from fodder rape cv. Korina had consistently fewer than tomato. Results are discussed in relation to host status, glucosinolates and potential use of Brassicaceae for control of Meloidogyne.

A GC–MS-based metabolomics study on the tubers of commercial potato cultivars upon storage

2014 ◽  
Vol 159 ◽  
pp. 287-292 ◽  
Author(s):  
Csilla Uri ◽  
Zsófia Juhász ◽  
Zsolt Polgár ◽  
Zsófia Bánfalvi
Keyword(s):  
Potato Cultivars ◽  
Commercial Potato ◽  
Metabolomics Study
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