Cereal cyst nematode Heterodera avenae is found predominantly in the spring wheat-growing areas in Adana Province in the eastern Mediterranean region of Turkey. The impact of H. avenae on wheat yield has been observed but not quantified. This study was conducted to determine the effect of H. avenae on the yield of 6 wheat varieties in the 2011/2012 and 2012/2013 growing seasons in the naturally infested fields of Adana. | Turkish Journal of Agriculture and Forestry Turk J Agric For (2014) 38: 820-823 © TÜBİTAK doi: Research Article Effect of cereal cyst nematode Heterodera avenae (Tylenchida: Heteroderidae) on yield of some spring wheat varieties in Adana Province, Turkey 1, 1 2 Mustafa İMREN *, İbrahim Halil ELEKCİOĞLU Department of Plant Protection, Faculty of Agriculture, Abant İzzet Baysal University, Gölköy Campus, Bolu, Turkey 2 Department of Plant Protection, Faculty of Agriculture, Çukurova University, Adana, Turkey Received: Accepted: Published Online: Printed: Abstract: Cereal cyst nematode Heterodera avenae is found predominantly in the spring wheat-growing areas in Adana Province in the eastern Mediterranean region of Turkey. The impact of H. avenae on wheat yield has been observed but not quantified. This study was conducted to determine the effect of H. avenae on the yield of 6 wheat varieties in the 2011/2012 and 2012/2013 growing seasons in the naturally infested fields of Adana. According to our results, H. avenae significantly suppressed grain yield of the wheat varieties, ranging from to . Negative or positive linear regressions between the reproduction factor of H. avenae and grain yield of the wheat cultivars depended on the variety. Regression analysis of the data revealed that reproduction factors of H. avenae were positively correlated with grain yield in cultivars Adana-99, Ceyhan-99, and Silverstar, whereas reproduction factors were negatively correlated with the Karatopak, Osmaniyem, and Seri-82 cultivars. Key words: Cereal cyst nematode, Heterodera avenae, yield loss, wheat 1. Introduction Wheat (Triticum spp.) is one of the most important field crops in Turkey, where spring and winter wheat cultivars are grown mostly under nonirrigated conditions. The eastern Mediterranean region is considered the main spring wheat production
