The need for integrated management of the cereal cyst nematodes, Heterodera spp. in Central Western Asia and North Africa.

2021 ◽  
pp. 20-26
Author(s):  
Abdelfattah A. Dababat ◽  
Muhammad Amjad Ali ◽  
Ravi Singh
Keyword(s):  
North Africa ◽  
Integrated Management ◽  
Economic Importance ◽  
Cyst Nematode ◽  
Cereal Cyst Nematode ◽  
Cyst Nematodes ◽  
Nematode Management ◽  
Western Asia

Abstract This chapter focuses on the economic importance, distribution, biology and symptoms of the cereal cyst nematode (CCN), Heterodera spp., in addition to recommended integrated nematode management (INM) tools to control CCN in wheat in Central Western Asia and North Africa.

Status of soybean cyst nematodes and integrated management in China.

2021 ◽  
pp. 111-116
Author(s):  
De-liang Peng
Keyword(s):  
Heterodera Glycines ◽  
Integrated Management ◽  
Management Strategies ◽  
Economic Importance ◽  
Cyst Nematode ◽  
Cyst Nematodes ◽  
Future Outlook ◽  
Nematode Management ◽  
Soybean Cyst Nematodes ◽  
Damage Symptoms

Abstract This chapter focuses on the host range, geographical distribution, economic importance, damage symptoms and biology and life cycle of the soyabean cyst nematode Heterodera glycines in China. Some information on their interactions with other nematodes and pathogens, efficacy and optimization of some recommended integrated nematode management systems and future outlook and research requirements for nematode management strategies are also presented.

Integrated nematode management of Pratylenchus penetrans in onion: a versatile approach to control a versatile nematode.

2021 ◽  
pp. 290-296
Author(s):  
Johnny Visser
Keyword(s):  
Life Cycle ◽  
Host Range ◽  
Integrated Management ◽  
Economic Importance ◽  
Future Research ◽  
Pratylenchus Penetrans ◽  
Nematode Management ◽  
Future Developments ◽  
Management Optimization ◽  
Damage Symptoms

Abstract This chapter discusses the economic importance, distribution, host range, damage symptoms, biology and life cycle, interactions with other nematodes and pathogens, recommended integrated management, and management optimization of Pratylenchus penetrans infesting onion. Future research requirements and future developments are also mentioned.

Integrated management of Meloidogyne incognita, the most economically damaging pathogen of cotton in the south-eastern United States.

2021 ◽  
pp. 87-93
Author(s):  
Richard F. Davis ◽  
Robert C. Kemerait
Keyword(s):  
Meloidogyne Incognita ◽  
Integrated Management ◽  
Economic Importance ◽  
Eastern United States ◽  
The South ◽  
Future Outlook ◽  
Nematode Management ◽  
South Eastern ◽  
Eastern Usa ◽  
Damage Symptoms

Abstract This paper focuses on the economic importance, host range, geographical distribution, damage symptoms and biology and life cycle of Meloidogyne incognita, the most economically damaging pathogen of cotton in the south-eastern USA. Some information on their interactions with other nematodes and pathogens, efficacy and optimization of some recommended integrated nematode management systems and future outlook and research requirements on nematode management are also presented.

Electrophoresis and biotest studies on some populations of cereal cyst nematode, Heterodera spp. (Tylenchida: Heteroderidae)

Nematology ◽  
2004 ◽  
Vol 6 (6) ◽  
pp. 857-865 ◽  
Author(s):  
Stig Andersson ◽  
Ricardo Holgado ◽  
Christer Magnusson ◽  
Janet Rowe
Keyword(s):  
Isoelectric Focusing ◽  
Banding Pattern ◽  
Cyst Nematode ◽  
Cereal Cyst Nematode ◽  
Heterodera Avenae ◽  
Cyst Nematodes ◽  
Norwegian Population ◽  
Host Spectrum ◽  
Cereal Cultivars

AbstractProtein variability of 27 populations of cyst nematodes belonging to the Heterodera avenae complex were studied using isoelectric focusing (IEF). Sixteen Norwegian populations were compared with standard populations of H. avenae, H. filipjevi, H. mani and H. arenaria. Norwegian populations were also tested for pathotype on selected cereal cultivars. Based on differences in the protein banding pattern, eight clusters of populations could be recognised. Nine Norwegian populations grouped together with H. avenae standards. The three Swedish populations: Knislinge, Ringsåsen and Våxtorp, previously classified as H. avenae, differed from this species, from H. filipjevi and from each other. Four Norwegian populations clustered together with the Våxtorp population. Two Norwegian populations formed a cluster together with a Swedish H. filipjevi standard. The Norwegian population Brekstad differed from all other populations, as did the standards of H. mani and H. arenaria. Pathotype testing of the Norwegian populations identified ten populations as H. avenae pathotype Ha 11, while three were close to pathotype Ha 12. The two H. filipjevi populations were close to the Swedish pathotype west. The Brekstad population differed from all others also in host spectrum. This population and the Våxtorp-group demonstrate a complexity within the Norwegian cereal cyst nematodes that merits further investigation.

scholarly journals Integrated management of Meloidogyne chitwoodi and M. fallax in potato: a complicated agronomical puzzle in the Netherlands and Belgium.

2021 ◽  
pp. 347-353
Author(s):  
Johnny Visser ◽  
Wim M. L. Wesemael
Keyword(s):  
Life Cycle ◽  
The Netherlands ◽  
Integrated Management ◽  
Management Strategies ◽  
Economic Importance ◽  
Future Research ◽  
Meloidogyne Chitwoodi ◽  
Nematode Management ◽  
Arable Farming ◽  
Management Optimization

Abstract Meloidogyne chitwoodi and M. fallax have been important nematode problems in arable farming in the Netherlands and Belgium ever since their detection in the 1980s. Their quarantine status and the damage inflicted on product quality in important cash crops such as potato, carrots, black salsify and gladiolus has increased drastically the need for integrated nematode management strategies that prevent yield losses and further spreading. This chapter elaborates on the economic importance, host range, distribution, symptoms of damage, biology and life cycle, interactions with other nematodes and pathogens, recommended integrated nematode management (prevention, inventory, crop rotation and supporting measures), and management optimization of M. chitwoodi and M. fallax. Future research requirements are also mentioned.

scholarly journals Incidence of Cereal Cyst Nematode Prevailing in Wheat-rice Growing Regions of Punjab Province, Pakistan

2020 ◽  
Author(s):  
M. Imran Hamid ◽  
M. Usman Ghazanfar ◽  
M. Qaiser Naeem Khan ◽  
Zaib ul Hasan ◽  
Saman Aslam
Keyword(s):  
Nematode Species ◽  
Cyst Nematode ◽  
Soil Samples ◽  
Rice Fields ◽  
Cereal Cyst Nematode ◽  
Heterodera Avenae ◽  
Cyst Nematodes ◽  
Population Densities ◽  
Punjab Province ◽  
Rice Monoculture

Background: Cereal Cyst Nematodes (CCN) are prevailing in all type of agricultural lands and responsible for enormous losses of cereal crops. The understandings on population densities and management of these nematode are required to improve crop health and productivity.Methods: A study was designed to assess the incidence of cereal cyst nematodes in wheat and rice monoculture cropping regions of eight districts of Punjab province, viz., Jhang, Khushab, layyah, Hafizabad, Sheikhupura, Narowal, Gujranwala and Sargodha in Pakistan. Population densities of cereal cyst nematodes were studied by extracting the cysts and second stage juveniles from soil samples and identified the nematode species. Result: The CCNs were found in 80% of the total 250 samples collected from wheat and rice monoculture fields of at least one crop. In the soil samples collected from wheat fields, an average of 7 to 38 cysts/100g of dry soil with eggs and J2 population of 142-771 were recorded. Whereas from the soil samples of rice fields, 17 to 25 cysts/100g soil were found with 345 to 508 eggs and juveniles. Among the wheat fields, the lowest incidence of 5.5% was recorded in kot–momin and highest incidence of 16.88% was recorded in Silanwali tehsils of Sargodha region. In rice fields, 24.69 to 27.00% incidence of CCNs was noticed in soil samples of various surveyed regions. Three different species of Heterodera genus were morphologically identified from the collections. The species includes Heterodera oryzae, Heterodera avenae and Heterodera graminophila. H. oryzae was more abundant in rice growing regions while H. avenae and H. graminophila were present dominantly in wheat growing regions. This study provides an inclusive information regarding cereal cyst nematode densities and species in wheat-rice growing regions of Punjab province of Pakistan.

Genetic variation of bread wheat accessions in response to the cereal cyst nematode, Heterodera filipjevi

Nematology ◽  
2018 ◽  
Vol 20 (9) ◽  
pp. 859-875 ◽  
Author(s):  
Marzieh Moatamedi ◽  
Eidi Bazgir ◽  
Mehdi Nasr Esfahani ◽  
Mostafa Darvishnia
Keyword(s):  
Genetic Diversity ◽  
Bread Wheat ◽  
Ssr Marker ◽  
Polymorphic Information Content ◽  
Cyst Nematode ◽  
Cereal Cyst Nematode ◽  
Cyst Nematodes ◽  
Ssr Analysis ◽  
Heterodera Filipjevi ◽  
Simple Sequence

Summary Bread wheat, Triticum aestivum, produces large edible grains and is consumed by 75% of the world’s populations. Cereal cyst nematodes have a global distribution and cause significant economic yield losses in many countries. Therefore, there is an urgent need to identify new resistance sources. In this study, the genetic diversity of 43 wheat accessions in response to cereal cyst nematode, Heterodera filipjevi Isfahan pathotype, was assessed using a simple sequence repeat (SSR) marker. Seven primers were used, out of which five primers showed polymorphisms. Alleles per primer varied from one to three per locus (mean 2.85). The highest and lowest polymorphic information content of 0.81 and 0.44 (mean 0.66) were related to Xgwm 3012DL and Xgwm147, respectively. Genetic similarity was 29-88% between accessions. SSR analysis divided the accessions into five main groups. Resistant cultivars ‘Bam’ and ‘Behrang’ possessed both Cre1 and Cre8 resistant genes. The Cre3 and Cat genes were partially sequenced in five cultivars of different responses to H. filipjevi. The nucleotide sequences were compared to Cre3 and Cat homologues, indicating 93-100% and 86-92% homology, respectively. The MEGA program showed highest similarity of Cre3 and Cat genes amplified with the resistance gene analogues (RGA14) in the wheat and Cat3-A1 gene in ‘Carnamah’. This research showed that SRR markers could efficiently verify genetic diversity between wheat accessions, and the known resistance genes (Cre genes) against the cereal cyst nematodes could not control the H. filipjevi Isfahan pathotype populations, except the Cre1 gene.

Effect of Cereal Cyst Nematode Infection on Defense Enzyme Activity of Wheat Root

2012 ◽  
Vol 18 (3) ◽  
pp. 359
Author(s):  
Jia LI ◽  
Delin XU ◽  
Hai LONG ◽  
Guangbing DENG ◽  
Zhifen PAN ◽  
...  
Keyword(s):  
Enzyme Activity ◽  
Wheat Root ◽  
Cyst Nematode ◽  
Nematode Infection ◽  
Cereal Cyst Nematode ◽  
Defense Enzyme
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