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Host-Finding Behaviors and Chemical Receptors of Entomopathogenic Nematodes

Entomopatojen Nematodların Konukçu Bulma Davranışları ve Kimyasal Reseptörleri

Harun Çimenkaya(ISPARTA UYGULAMALI BİLİMLER ÜNİVERSİTESİ, ZİRAAT FAKÜLTESİ, BİTKİ KORUMA BÖLÜMÜ)0009-0001-3211-2045
Fatma Gül Göze Özdemir(ISPARTA UYGULAMALI BİLİMLER ÜNİVERSİTESİ, ZİRAAT FAKÜLTESİ, BİTKİ KORUMA BÖLÜMÜ)0000-0003-1969-4041
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Publication Date
2026-10-12
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Thus, integrating knowledge of host-seeking behavior and chemoreception provides a promising framework for optimizing the use of EPNs as environmentally friendly alternatives in agricultural pest control.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Entomopathogenic nematodes (EPNs), belonging mainly to the genera Steinernema and Heterorhabditis, are widely recognized as effective biological control agents against soil-dwelling insect pests.
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Key Findings & Data:Host-seeking behavior varies among species and is based on distinct foraging strategies such as ambushing, cruising, or intermediate modes.
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Conclusion & Impact:Thus, integrating knowledge of host-seeking behavior and chemoreception provides a promising framework for optimizing the use of EPNs as environmentally friendly alternatives in agricultural pest control.
🔬Design:Derleme
📍Scope:Comprehensive Sample
⚙️Variables:Bilgi kimyasalları · Biyolojik kontrol · Entomopatojen nematod

Abstract

Entomopathogenic nematodes (EPNs), belonging mainly to the genera Steinernema and Heterorhabditis, are widely recognized as effective biological control agents against soil-dwelling insect pests. Their infective juveniles (IJs) actively search for hosts and release symbiotic bacteria (Xenorhabdus or Photorhabdus), which kill the insect within a short period and provide nutrients for nematode reproduction. Host-seeking behavior varies among species and is based on distinct foraging strategies such as ambushing, cruising, or intermediate modes. EPNs rely heavily on chemical cues, including carbon dioxide, herbivore-induced plant volatiles (HIPVs), and insect-derived compounds, to locate suitable hosts. These chemical signals not only enhance the accuracy of host finding but also increase the efficiency of infection. Soil characteristics, moisture, and organic matter content significantly influence the dispersion and perception of these cues. Moreover, EPNs display species- and strain-specific responses to chemical stimuli, shaped by genetic adaptation, selection pressures, and environmental conditions. Understanding the chemical ecology of EPNs is essential for developing sustainable pest management strategies. Recent research suggests that exploiting attractive signals, deploying infected cadavers, or enhancing nematode responsiveness through pre-exposure may improve their field performance. Thus, integrating knowledge of host-seeking behavior and chemoreception provides a promising framework for optimizing the use of EPNs as environmentally friendly alternatives in agricultural pest control.

Özet

Entomopatojen nematodlar (EPN’ler), toprak kökenli zararlılarla biyolojik mücadelede önemli potansiyele sahip doğal düşmanlardır. Heterorhabditis ve Steinernema cinslerine ait bu nematodlar, simbiyotik bakterileri (Photorhabdus ve Xenorhabdus) aracılığıyla konukçularını kısa sürede öldürerek gelişim ve çoğalmalarını sağlarlar. Konukçu bulma davranışları, türlere özgü konukçu arama stratejileri (pusu, ara ve gezen tip) ile şekillenir. EPN’ler, karbondioksit, bitki uçucu organik bileşikleri (HIPV’ler) ve böcek kaynaklı kimyasallar gibi çevresel ipuçlarını kemotaksi ve kemosensör mekanizmaları sayesinde algılar. Bu sinyaller arasında özellikle otçul zararına uğramış köklerin salgıladığı uçucu bileşikler nematodların yöneliminde kritik rol oynamaktadır. Ayrıca, böcek dışkısı ve feromonlar da güçlü çekici faktörler arasında yer alır. Toprak tipi, nem, pH ve organik madde varlığı bu kimyasal sinyallerin yayılımını ve etkinliğini doğrudan etkilemektedir. Tür ve suş düzeyinde gözlenen farklı tepkiler, genetik adaptasyon ve çevresel koşulların EPN davranışında çeşitlilik yarattığını göstermektedir. EPN’lerin kimyasal ekolojisinin anlaşılması, tarımsal zararlılarla mücadelede daha etkin, çevre dostu ve sürdürülebilir biyolojik kontrol stratejilerinin geliştirilmesine önemli katkılar sağlayacaktır.

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Cite This Article

Çimenkaya, H., Özdemir, F. G. G. (2026). Host-Finding Behaviors and Chemical Receptors of Entomopathogenic Nematodes. Ziraat Fakültesi Dergisi, Sayı: 1. https://doi.org/10.54975/isubuzfd.1797908

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