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Title: Distribuion and infestation rates of cyst nematodes(Heterodera spp.) in cabbage-growing areas in Samsun

Author
item MENNAN, SEVILHAN - ONDOKUZ MAYIS UNIV, TURK.
item Handoo, Zafar
item ECEVIT, OSMAN - ONDOKUZ MAYIS UNIV, TURK.

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 4/23/2006
Publication Date: 6/5/2006
Citation: Mennan, S., Handoo, Z.A., Ecevit, O. 2006. Distribution and infestation rates of cyst nematodes(Heterodera spp.)in cabbage-growing areas in Samsun [Abstract]. In: Proceedings of the 50th ESN International Symposium, June 5-9, 2006, Bulgaria. p. 130-131.

Interpretive Summary:

Technical Abstract: Cabbages are cultivated in over 7058.5 ha in Samsun (Northern part of Turkey). White head cabbage (Brassica oleracea L. var. capitata L. subvar. alba), red head cabbage (Brassica oleracea L. var. capitata L. subvar. rubra), and kale (Brassica oleracea L. var. acephala) are the most produced varieties, and the annual yield production for 2004 of white head and red head cabbages and kale are 87.628, 60.106 and 41.113 t, respectively. A survey was conducted in the Samsun, Turkey to study the occurrence and percentage of cyst nematodes associated with cabbages (Brassica spp.) in 2002, 2004 and 2005. A total of 101 soil and root samples were analyzed, and cysts were detected in 45% of the soil samples collected from the cabbage fields. Cysts, females and juveniles were identified as Heterodera cruciferae and Heterodera mediterranea based on morphology of cysts and second-stage juveniles. Among these cysts, 78% were Heterodera cruciferae, 20% H. mediterranea, and 2% had a mixed population of both H. cruciferae and H. mediterranea. Among cabbage varieties, red head was the most infected with H. cruciferae (71%) followed by white head (58%) and kale (only 3%). The highest population level was 947 cysts/L soil in white head cabbage fields for H. cruciferae and 1160 cysts/L soil in red head cabbage fields for H. mediterranea. This is the first report of H. mediterranea in Turkey and the first record of white and red head cabbages being hosts for this nematode.