Yavuz Selim ŞAHİN, İsmail Alper SUSURLUK

Türkistan Hamamböceği Blatta lateralis (Dictyoptera: Blattidae)’in Hidrofil Kumaş Kullanılarak Entomopatojen Nematod Heterorhabditis bacteriophora HBH (Rhabditida: Heterorhabditidae) ile Mücadelesi

Halk sağlığı açısından önemli bir zararlı olan hamam böceklerine karşı kullanılan kimyasal ilaçlar insan sağlığına zararlı olup böceklerin direnç kazanmasına neden olmaktadır. Bu çalışmada biyolojik mücadele kapsamında kimyasal insektisitlerin yerine kullanılan entomopatojen nematod (EPN) (Heterorhabditis bacteriophora HBH) Türkistan hamam böceğine (Blatta lateralis) karşı uygulanmıştır. Toprak üstünde, EPN’lerin ihtiyaç duyduğu nemli ortamı sağlayabilmek amacıyla hidrofil kumaş tuzağı kurulmuştur. 50, 100 ve 150 IJ/cm2 dozajında EPN uygulanan kumaşlar, 37 gün süren deneme boyunca değiştirilmeden kullanılmıştır. İlk uygulama, tuzakların kurulmasından hemen sonra 10 tane B. lateralis ergini eklenerek yapılmıştır. Benzer şekilde, ikinci uygulama 15 gün, üçüncü uygulama ise 30 gün sonra başlatılmıştır. Tüm uygulamalarda, B. lateralis erginleri EPN'lere 4 ve 7 gün maruz kaldıktan sonra hamamböceklerinin ölüm oranları belirlenmiştir. Türkistan hamamböceği tuzakların kurulmasından 30 gün sonra HBH'ye maruz kaldığında bile enfeksiyon meydana gelmiştir. Bu çalışma sonucunda, hidrofil kumaş kullanılarak hibrit HBH ırkının topraküstü kalıcılığı ve infektivitesi 4 haftadan daha uzun süre sağlanabilmiştir. Ek olarak, hamamböceği ölüm oranlarının maruz kalma süresine ve HBH dozuna bağlı olarak arttığı tespit edilmiştir.

Anahtar Kelimeler:

Blatta lateralis, entomopatojen nematod

The Control of Turkestan Cockroach Blatta lateralis (Dictyoptera: Blattidae) by The Entomopathogenic nematode Heterorhabditis bacteriophora HBH (Rhabditida: Heterorhabditidae) Using Hydrophilic Fabric Trap

Chemical insecticides used against cockroaches, which are an important urban pest and considered public health, are harmful to human health and cause insects to gain resistance. The entomopathogenic nematode (EPN), Heterorhabditis bacteriophora HBH, were used in place of chemical insecticides within the scope of biological control against the Turkestan cockroaches Blatta lateralis in this study. The hydrophilic fabric traps were set to provide the moist environment needed by the EPNs on aboveground. The fabrics inoculated with the nematodes at 50, 100 and 150 IJs/cm2 were used throughout the 37-day experiment. The first treatment was performed by adding 10 adult cockroaches immediately after the establishment of the traps. In the same way, the second treatment was applied after 15 days and the third treatment after 30 days. The mortality rates of cockroaches after 4 and 7 days of exposure to EPNs were determined for all treatments. Although Turkestan cockroaches were exposed to HBH 30 days after the setting of the traps, infection occurred. As a result of this study, the above-ground persistence and infectivity of HBH could be achieved more than 4 weeks by using hydrophilic fabric. In addition, the mortality rates of the Turkestan cockroaches were found to increase depending on exposure time and the nematode dosage.

Keywords:

Blatta lateralis, entomopathogenic nematode,

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