Atilla ÖCAL, Gülay BEŞİRLİ, Emre EVLİCE, Elif YAVUZASLANOĞLU, İbrahim Halil ELEKCİOĞLU

Bazı bitki türlerinin Ditylenchus dipsaci (Kühn, 1857) Filipjev, 1936 (Tylenchida: Anguinidae)’nin dört farklı sarımsak popülasyonuna karşı konukçuluk durumlarının belirlenmesi

Soğan sak nematodu, Ditylenchus dipsaci (Kühn, 1857) Filipjev, 1936 (Tylenchida: Anguinidae) Türkiye’de ekonomik olarak sarımsak yetiştiriciliği yapılan üretim alanlarında yaygın olarak bulunmaktadır. Ditylenchus dipsaci‘nin tarla koşullarında mücadelesi için uygun yöntemlerden birisi de konukçu olmayan bitki türleri ile rotasyon uygulamalarıdır. Bu nedenle sarımsak bitkisi ile rotasyona girebilecek bitki türlerinin nematoda konukçuluk durumlarının belirlenmesi önem arz etmektedir. Bu amaçla çalışmada sekiz farklı bitki türünün önemli sarımsak yetiştirme alanlarından elde edilen dört farklı D. dipsaci popülasyonuna karşı konukçuluk durumları 2017-2018 yıllarında araştırılmıştır. Denemeler iklim odası şartlarında nematodlu ve nematodsuz bitkiler için dört tekerrürlü olarak yürütülmüştür. Nematodlu bitkilere bitki başına 200 nematod inokule edilmiştir. İnokulasyondan altı hafta sonra bitkilerdeki sonuç nematod popülasyonu belirlenerek üreme faktörleri belirlenmiştir. Çalışmada bütün nematod popülasyonları için, nergis bitkisi 5.0-6.2 arasında üreme faktörü (Rf) ile mükemmel konukçu olarak belirlenmiştir. Soğan ve sarımsak bitkileri sırasıyla 3.2-3.8 ve 2.1-2.5 Rf ile iyi konukçu olarak tespit edilmiştir. Yonca, nohut, pırasa, marul ve buğday bitki türleri sırasıyla 0.6-0.7, 0.5-0.8, 0, 0 ve 0.3-0.5, Rf değerleri ile konukçu olmayan bitki türleri olarak belirlenmiştir. Gerçekleştirilen bu çalışma ile konukçu olmayan bitki türlerinin soğan sak nematodunun bulaşık olan üretim alanlarında rotasyon bitkisi olarak kullanılabileceği sonucuna varılmıştır.

Anahtar Kelimeler:

Bitki paraziti nematod, ırk, konukçu, münavebe, soğan-sak nematodu

Determination of the host status of some plant species with four different garlic populations of Ditylenchus dipsaci (Kühn, 1857) Filipjev, 1936 (Tylenchida: Anguinidae)

Stem and bulb nematode, Ditylenchus dipsaci (Kühn, 1857) Filipjev, 1936 (Tylenchida: Anguinidae) is widely distributed in areas where garlic is grown commercially in Turkey. One of the suitable methods for control of D. dipsaci under field conditions is rotation with non-host plant species. Thus, it is necessary to determine the host status of the plant species that can be used in rotation with the garlic plant. For this purpose, the host status of eight different plant species for four D. dipsaci populations obtained from important garlic growing areas was investigated in 2017 and 2018. The experiments were conducted with four replicates of treatments with nematode and without nematodes in a control environment room. Each plant was inoculated with 200 nematodes of the respective population. Six weeks after inoculation, the final nematode population in the plants and reproduction factors were determined. For all nematode populations, daffodil was an excellent host with reproduction factor (Rf) of 5.0-6.2. Onion and garlic plants were good hosts with Rf of 3.2-3.8 and 2.1-2.5, respectively. Lucerne, chickpea, leeks, lettuce and wheat were determined to be non-host species with Rf 0.6-0.7, 0.5-0.8, 0, 0 and 0.3-0.5, respectively. It was concluded that these non-host plant species can be used as rotational crops in the garlic production areas infested with D. dipsaci.

Keywords:

Host, plant parasitic nematode, race, rotation, stem and bulb nematode,

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