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Journals / Anadolu Tarım Bilimleri Dergisi / 2026 / Cilt: 41

Determination of the effect of Laurus nobilis extract against the root-knot nematode (Meloidogyne incognita) and Agriotes spp. (Elateridae: Coleoptera) in sunflower (Helianthus annuus)

Ayçiçeğinde (Helianthus annuus) kök-ur nematodu (Meloidogyne incognita) ve Agriotes spp. (Elateridae: Coleoptera)'ya karşı Laurus nobilis ekstraktının etkisinin belirlenmesi

Dilara Yuksel(ESKISEHIR OSMANGAZI UNIVERSITY, FACULTY OF AGRICULTURE, DEPARTMENT OF PLANT PROTECTION)0009-0009-4261-9278
Doğancan Kahya(ESKİŞEHİR OSMANGAZİ ÜNİVERSİTESİ, ZİRAAT FAKÜLTESİ, BİTKİ KORUMA BÖLÜMÜ)0000-0002-8996-3393
Refik Bozbuga(ESKİŞEHİR OSMANGAZİ ÜNİVERSİTESİ, ZİRAAT FAKÜLTESİ, BİTKİ KORUMA BÖLÜMÜ)0000-0001-9201-5725
Pages
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Publication Date
2026-07-29
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⚡ TL;DR(Too Long; Didn't Read)

The experiment was completed after 90 days, and plant growth parameters and the effects against the nematode and insect pest were evaluated.According to the results obtained, the lowest plant height was recorded in the M. incognita+Agriotes spp. treatment, whereas the lowest head diameter and head weight were observed in the M. incognita+L. nobilis treatment.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Oils essential for sustaining human life are obtained from both plant and animal sources.
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Key Findings & Data:Sunflower (Helianthus annuus) is an oilseed crop widely cultivated worldwide and occupies a significant place in agricultural production.
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Conclusion & Impact:The experiment was completed after 90 days, and plant growth parameters and the effects against the nematode and insect pest were evaluated.According to the results obtained, the lowest plant height was recorded in the M. incognita+Agriotes spp. treatment, whereas the lowest head diameter and head weight were observed in the M. incognita+L. nobilis treatment.
🔬Design:Araştırma Makalesi
📍Scope:Comprehensive Sample
⚙️Variables:Alternatif mücadele · Bitki ekstraktı · Nematod

Abstract

Oils essential for sustaining human life are obtained from both plant and animal sources. Sunflower (Helianthus annuus) is an oilseed crop widely cultivated worldwide and occupies a significant place in agricultural production. However, numerous pests, diseases, and weed species cause significant yield and quality losses in sunflower production. Among these, plant parasitic nematodes and insect pests are of particular importance. Globally, several nematode species are known to infest sunflower, but root knot nematodes belonging to the genus Meloidogyne spp. are responsible for the most severe damage. In addition, Agriotes spp. commonly known as wireworms, represent another group of soil borne pests that damage the root system. These pests directly injure plant roots, thereby impairing plant growth and leading to significant yield reductions. While chemical control remains widely used against these pests, environmentally friendly alternative management strategies have gained increasing attention in recent years. This study was conducted to determine the effect of Laurus nobilis (Lauraceae) laurel plant extract against Meloidogyne incognita and Agriotes spp. in sunflower plants. The experiment was carried out in pots under outdoor conditions and the plant extract was applied simultaneously with nematode and insect infestation, and then on days 15, 30, and 45. The experiment was completed after 90 days, and plant growth parameters and the effects against the nematode and insect pest were evaluated.According to the results obtained, the lowest plant height was recorded in the M. incognita+Agriotes spp. treatment, whereas the lowest head diameter and head weight were observed in the M. incognita+L. nobilis treatment. The treatments with the lowest number of second-stage juveniles in the soil and the lowest reproduction rate were M. incognita+L. nobilis+Agriotes spp. In conclusion, given that the applied treatment is considered safer for both the environment and human health, it may serve as an alternative to conventional pesticide use in pest management and provide a basis for future research.

Özet

İnsanların yaşamsal faaliyetlerini sürdürebilmesi için gerekli olan yağlar bitkisel ve hayvansal kaynaklardan elde edilmektedir. Ayçiçeği (Helianthus annuus L.) dünya genelinde yaygın olarak yetiştirilen ve tarımsal üretimde önemli bir yere sahip olan yağ bitkisidir. Ancak bu bitkide ürün ve verim kayıplarına neden olan pek çok zararlı, hastalık ve yabancı ot türü bulunmaktadır. Zararlılar arasında bitki paraziti nematodlar ve böcekler önemli bir yer tutmaktadır. Dünya genelinde birçok nematod türü ayçiçeğine zarar vermektedir ancak en ciddi zararı kök-ur nematodları olan Meloidogyne spp. türleri yapmaktadır. Bunun yanı sıra kök sistemine zarar veren diğer toprak altı zararlılarından biri de Agriotes spp. (Elateridae: Coleoptera) türleridir. Toprak altında bulunan bu zararlılar, bitki kök sistemine verdikleri doğrudan zararla gelişmeyi engellemekte ve verim kayıplarına yol açmaktadır. Bu zararlılarla mücadelede kimyasal mücadelenin yanında çevre dostu alternatif mücadele yöntemleride son yıllarda önem kazanmaya başlamıştır. Bu çalışma ayçiçeği bitkisinde Meloidogyne incognita ve Agriotes spp’ye karşı Laurus nobilis bitki ekstraktının etkisinin belirlenmesi amacıyla yapılmıştır. Bu çalışma ayçiçeği bitkisinde Meloidogyne incognita ve Agriotes spp.’ye karşı Laurus nobilis (Lauraceae) defne bitki ekstraktının etkisinin belirlenmesi amacıyla yapılmıştır. Deneme açık alan koşullarında saksılarda yürütülmüş olup bitki ekstraktı, nematod ve böcek bulaştırma işlemiyle eş zamanlı olarak ve daha sonra 15., 30. ve 45. günlerde uygulanmıştır. Deneme 90 gün sonunda sonlandırılarak bitki gelişim parametreleri, nematod ve tel kuruduna karşı olan etkileri değerlendirilmiştir. Elde edilen sonuçlara göre en düşük bitki boyu M. incognita + Agriotes spp. uygulamasında belirlenirken en düşük tabla çapı ve ağırlığı M. incognita + L. nobilis uygulamasında belirlenmiştir. Topraktaki ikinci dönem larva sayısı ve üreme oranının en düşük olduğu uygulamalar ise M. incognita + L. nobilis + Agriotes spp. uygulamaları olmuştur. Sonuç olarak yapılan uygulamanın çevre ve insan sağlığı açısından daha güvenli olması nedeniyle zararlılarla mücadelede pestisit kullanımına alternatif olabileceği ve yapılacak ileriki çalışmalara ışık tutacağı düşünülmektedir.

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Cite This Article

Yuksel, D., Kahya, D., Bozbuga, R. (2026). Determination of the effect of Laurus nobilis extract against the root-knot nematode (Meloidogyne incognita) and Agriotes spp. (Elateridae: Coleoptera) in sunflower (Helianthus annuus). Anadolu Tarım Bilimleri Dergisi, Cilt: 41. https://doi.org/10.7161/omuanajas.1906651

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