Journals / Artvin Çoruh Üniversitesi Orman Fakültesi Dergisi / 2023 / Cilt: 24 Sayı: 1

Isolation characterization and pathogenicity of Helicoverpa armigera single nucleopolyhedrovirus isolate from Türkiye

Türkiye'den Helicoverpa armigera single nükleopolihedrovirüs izolatının izolasyonu, karakterizasyonu ve patojenitesi

Pages
187–195
Publication Date
2023-05-15
DOI
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AI Summary & Key Takeaways

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

Therefore, HearSNPV-D can be used as a specific, environmentally friendly control agent for H. armigera.

📌 3 Key Takeaways

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Objective & Hypothesis:The cotton bollworm, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae), is a major pest of agricultural crops, such as cotton, horticultural plants, a range of vegetable crops and forest trees.
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Key Findings & Data:The phylogenetic analysis according to the polyhedrin and late expression factor-8 genes appeared that the new isolate was in close relationship with HearSNPV China and Türkiye isolate.
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Conclusion & Impact:Therefore, HearSNPV-D can be used as a specific, environmentally friendly control agent for H. armigera.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Helicoverpa armigera · bakülovirus · nükleopolihedrovirüs

Abstract

The cotton bollworm, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae), is a major pest of agricultural crops, such as cotton, horticultural plants, a range of vegetable crops and forest trees. Many dead and live larvae and pupa samples of H. armigera, an extremely polyphagous pest, were collected from Adana in Türkiye. It was observed that cadaveric integuments were fragile, and their body tissues were also liquefied. Studies with phase-contrast microscopy revealed a very intense baculovirus infection in cadavers. Transmission electron microscopy exhibited that the new baculovirus had one nucleocapsid in an envelope in the occlusion bodies. Therefore, the isolate was named Helicoverpa armigera single nucleopolyhedrovirus-D (HearSNPV-D). The phylogenetic analysis according to the polyhedrin and late expression factor-8 genes appeared that the new isolate was in close relationship with HearSNPV China and Türkiye isolate. The new isolate was tested on six different insects including its own host Helicoverpa armigera, Hyphantria cunea, Malacosoma neustria, Lymantria dispar, Thaumetopea pityocampa and Spodoptera exigua larvae. Bioassay studies showed that HearSNPV-D was virulent to H. armigera and had a narrow host range. The LC50 value was determined as 0.7 × 105 and 1.9 × 107 OBs/ml for H. armigera and S. exigua, respectively. Non-significant mortality was observed in non-host species by HearSNPV-D, which may reveal the highly specific nature of HearSNPV-D. Therefore, HearSNPV-D can be used as a specific, environmentally friendly control agent for H. armigera.

Özet

Pamuk kurdu, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae), pamuk, bahçe bitkileri, çeşitli sebze bitkileri ve orman ağaçları gibi tarımsal ürünlerde önemli bir zararlıdır. Polifag bir zararlı olan H. armigera’nın çok sayıda ölü ve canlı larva ve pupa örneği Türkiye’de Adana’dan toplanmıştır. Kadavra derilerinin kırılgan olduğu ve vücut dokularının da sıvılaştığı görüldü. Faz-kontrast mikroskobu ile yapılan çalışmalar, kadavralarda çok yoğun bir bakülovirüs enfeksiyonu ortaya çıkardı. Transmisyon elektron mikroskobu, yeni bakülovirüsün oklüzyon yapılarında, zarf içinde bir nükleokapside sahip olduğunu gösterdi. Bu nedenle izolata Helicoverpa armigera single nükleopolihedrovirüs-D (HearSNPV-D) adı verildi. Polihedrin ve geç ekspresyon faktörü-8 genlerine göre yapılan filogenetik analiz, yeni izolatın HearSNPV Çin ve Türkiye izolatı ile yakın ilişki içinde olduğunu ortaya koydu. Yeni izolat, kendi konakçısı Helicoverpa armigera’nın yanısıra Hyphantria cunea, Malacosoma neustria, Lymantria dispar, Thaumetopea pityocampa ve Spodoptera exigua olmak üzere toplam altı farklı böcek üzerinde test edildi. Biyoanaliz çalışmaları, HearSNPV-D’nin H. armigera’ya karşı öldürücü olduğunu ve dar bir konakçı aralığına sahip olduğunu gösterdi. LC50 değeri H. armigera ve S. exigua için sırasıyla 0.7 × 105 OBs/ml ve 1.9 × 107 OBs/ml olarak belirlendi. HearSNPV-D tarafından konakçı olmayan türlerde anlamlı olmayan ölüm gözlemlendi, bu da HearSNPV-D’nin oldukça spesifik doğasını ortaya çıkarmıştır. Bu nedenle HearSNPV-D, H. armigera için spesifik, çevre dostu bir kontrol ajanı olarak kullanılabilir.

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Cite This Article

GENCER, D. (2023). Isolation characterization and pathogenicity of Helicoverpa armigera single nucleopolyhedrovirus isolate from Türkiye. Artvin Çoruh Üniversitesi Orman Fakültesi Dergisi, Cilt: 24 Sayı: 1, 187–195. https://ajindex.com/articles/939192

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