Bazı Heterorhabditis bacteriophora (Poinar, 1976) (Rhabditida: Heterorhabditidae) ırklarının Lolium perenne L. (Poales: Poaceae) ve Galleria mellonella (L., 1758) (Lepidoptera: Pyralidae)'ya yönelimi

Year 2019, Volume: 43 Issue: 4, 409 - 416, 01.12.2019

Sema Yıldırım Yavuz Selim Şahın Alper Susurluk

https://doi.org/10.16970/entoted.559839

Abstract

Entomopatojen nematodlar (EPN'ler) türlere bağlı olarak, birbirinden farklı konukçu bulma davranışlarına sahiptirler. Konukçu arama davranışlarının yanı sıra, bazı EPN'lerin topraktaki yönelimleri bitki köklerine bağlı olarak değişebilir. Bursa’da laboratuvar koşullarında 2019 yılında yapılan bu çalışmada bazı Heterorhabditis bacteriophora (Poinar, 1976) (Rhabditida: Heterorhabditidae) ırklarının İngiliz çimi Lolium perenne L. (Poales: Poaceae) köklerine ve Petek Güvesi Galleria mellonella (L., 1758) (Lepidoptera: Pyralidae) larvalarına yönelimleri araştırılmıştır. Bu amaçla, üç farklı H. bacteriophoraırkı kullanılmıştır. Bunlardan birisi hibrit tür (HBH) diğer ikisi ise hibrid türün ebeveynidir (HB1138, HB4). Çalışma, üç farklı deneysel kombinasyon ile laboratuvar koşullarında yapılmıştır. Y-Olfaktometre düzeneğinde A kombinasyonu bitki kökleri, larvalar ve kontrol; B kombinasyonu bitki kökleri, kontrol-I ve kontrol-II; C kombinasyonu ise mekanik olarak yaralanmış bitki kökleri, kontrol-I ve kontrol-II bölümlerini içermektedir. Elde edilen sonuçlar; Kombinasyon A'da bitki köklerine ve böcek larvalarına karşı en yüksek yönelimi HB1138 göstermiştir. Kombinasyon B'de bitki köklerine en yüksek yönelimi HBH ve kombinasyon C'de mekanik olarak yaralı bitki köklerine en yüksek yönelimi HB4 sergilemiştir. Bu çalışmada, aynı türe ait farklı EPN ırklarının bitki köklerine ve konukçu böceklere yönelimi değişebileceği tespit edilmiştir.

Keywords

Entomopatojen nematodlar, İngiliz çimi, yönelim

Orientation of some Heterorhabditis bacteriophora (Poinar, 1976) (Rhabditida: Heterorhabditidae) strains to Lolium perenne L. (Poales: Poaceae) and Galleria mellonella (L., 1758) (Lepidoptera: Pyralidae)

Abstract

Entomopathogenic nematodes (EPNs) have different host-finding (foraging) behavior that varies from species to species. Besides their foraging behavior, the orientation of some EPNs can vary depending on plant roots. In the present study, the orientation of some Heterorhabditis bacteriophora (Poinar, 1976) (Rhabditida: Heterorhabditidae) strains to perennial ryegrass Lolium perenne L. (Poales: Poaceae) roots and greater wax moth Galleria mellonella (L., 1758) (Lepidoptera: Pyralidae) larvae were investigated. For this purpose, three different strains of H. bacteriophora were used. One of them was a hybrid strain (HBH) and the two were parents (HB1138 and HB4) of the hybrid strain. Three experimental combinations were conducted in the study conducted in 2019 under laboratory conditions in Bursa, Turkey: (A) plant roots, larvae and control; (B) plant roots, control I and control II; and (C) mechanically damaged plant roots, control-I and control-II in Y-tube olfactometers filled with moist sand. The results indicated that for combination A, most orientation to plants and larvae was seen in HB1138; for combination B, most orientation to plant roots was was seen in HBH; and for combination C, strain HB4 showed the most orientation to mechanically damaged plant roots. According to the results, each strain of the same EPN species may have a different response to plant roots and host insects.

Keywords

Entomopathogenic nematodes, perennial ryegrass, orientation

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