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Öğe Distribution and diversity of cyst nematode (Nematoda: Heteroderidae) populations in the republic of Azerbaijan, and their molecular characterization using ITS-RDNA analysis(Organization of Nematologists of Tropical America, 2019) Dababat, A.A.; Muminjanov, H.; Erginbas-Orakci, G.; Fakhraddin, G. Ahmadova; Waeyenberge, L.; Yildiz, S.; Duman, N.Cereal cyst nematodes (Heterodera spp.) are a significant threat to global cereal production systems and choosing the correct management strategy requires knowledge and identification of various species. We conducted a survey across the main cereal-growing regions of the Republic of Azerbaijan in 2017. Cyst-forming nematodes were detected in 34 samples (44.7%), of which 28 were identified as H. filipjevi or H. avenae using internal transcribed spacer (ITS)-rDNA sequencing. Six populations were unidentifiable to species level and were recorded as belonging to the H. avenae group. H. filipjevi was the dominant species, found in 19 samples (25%) from the provinces of Qobustan, Ismailli, Oguz, Sheki, Barda, and Kurdamir. H. avenae was detected in 9 samples (11.8%) across the provinces of Ismailli, Oguz, and Sheki. ITS-rDNA phylogenetic analyses showed that populations of H. filipjevi clustered in one group with two subgroups, all supported by high bootstrap values. Populations of H. avenae also clustered in one group with two subgroups. Genetic dissimilarities were higher within populations of H. filipjevi when compared to populations of H. avenae. The density of many of these cyst populations approached or exceeded the maximum threshold level for economic losses. This is the first report on H. filipjevi and H. avenae in Azerbaijan. The knowledge of cereal cyst nematode presence is extremely important for Azerbaijan's agricultural industry when assessing the occurrence and distribution of soilborne diseases. Management measures to control cereal cyst nematodes should be directed towards breeding for resistant germplasm, crop rotation, and implementing other management practices. © 2019 Organization of Nematologists of Tropical America. All rights reserved.Öğe THE EFFICACY of FOSTHIAZATE, FLUOPYRAM, AND PAECILOMYCES LILACINUS AGAINST FIELD POPULATION OF GLOBODERA ROSTOCHIENSIS(Organization of Nematologists of Tropical America, 2022) Saleh, A.; Altaş, A.; Evlice, E.; Özer, G.; Imren, M.; Dababat, A.A.The potato cyst nematode, Globodera rostochiensis, is a major potato pest throughout the world. Despite the environmental concerns associated with the use of chemical nematicides, they remain essential for integrated management programs, especially when resistant varieties are lacking. This study investigated fosthiazate efficacy to control G. rostochiensis in potato in comparison to fluopyram and the biological control agent Paecilomyces lilacinus strain PL1. Two independent trials were carried out at fields in Ödemiş and Bozdağ Districts, İzmir Province, Turkey. All treatments reduced densities of G. rostochiensis in roots and soil compared to the non-treated controls. All pesticides consistently decreased the reproduction factor (Rf = final population density/initial population density) values of G. rostochiensis compared to the non-treated controls in Ödemiş and Bozdağ. However, fosthiazate and fluopyram were more effective than the biological agent. Fosthiazate, fluopyram, and P. lilacinus strain PL1 applications increased potato yields in Ödemiş and Bozdağ by 21-34% and 20-31%, respectively, compared to the control. In conclusion, the application of fosthiazate and fluopyram provided a higher level of protection against G. rostochiensis and should be considered an alternative and integrative option in nematode management programs. © 2022 Organization of Nematologists of Tropical America. All rights reserved.Öğe First report of heterodera hordecalis, a cereal cyst nematode, on wheat in Algeria(American Phytopathological Society, 2018) Smaha, D.; Mokrini, F.; Imren, M.; Mokabli, A.; Dababat, A.A.[No abstract available]Öğe MOLECULAR IDENTIFICATION AND PHYLOGENETIC DIVERSITY OF CEREAL CYST NEMATODES (HETERODERA SPP.) POPULATIONS FROM ALGERIA(Organization of Nematologists of Tropical America, 2020) Mehalaine, K.; İmren, M.; Özer, G.; Hammache, M.; Dababat, A.A.Mehalaine, K., M. Imren, G. Özer, M. Hammache, and A. A. Dababat. 2020. Molecular identification and phylogenetic diversity of cereal cyst nematodes (Heterodera spp.) populations from Algeria. Nematropica 50:134-143. Cereal cyst nematodes (CCN), Heterodera spp., are the most devastating plant-parasitic nematodes of cereals causing serious global economic losses. In this study, surveys to investigate plant-parasitic nematodes associated with wheat were performed in twenty fields in twelve provinces of Algeria in 2018. Cereal cyst nematodes were found in 41.6% of the investigated wheat fields. Forty-eight CCN populations from twenty locations were obtained and morphologically classified. To confirm the morphological classification, the internal transcribed spacer (ITS) of rDNA was amplified with F194/F195 primers, sequenced, and analyzed using BLASTn searches of the NCBI database. Populations were classified as Heterodera avenae, H. hordecalis, H. carotae, and H. cruciferae. Heterodera carotae and H. cruciferae are reported in Algeria for the first time from two and three surveyed locations, respectively. Heterodera carotae and H. cruciferae were grouped into a well-supported clade and close to populations from Italy and the Netherlands in the phylogenetic tree, respectively. Heterodera hordecalis and H. avenae were found in ten and five fields, respectively. Based on phylogenetic analysis, H. hordecalis showed high similarity to the Israeli population, whereas H. avenae populations from Algeria were found to have high similarity to the Spanish population. Due to the variation among the Algerian populations of H. hordecalis and H. avenae, it can be assumed they have been introduced into Algeria multiple times. © 2020 Organization of Nematologists of Tropical America. All rights reserved.