Determination of repellent effect of a plant activator containing acibenzolar-s-methyl (BTH) on Cicadulina spp. Naudé (Hemiptera: Cicadellidae)

Abstract

Acibenzolar-S-methyl (BTH) is one of the first representatives of a new generation of effective substances that are commercially used to induce resistance or defense against pests in plants. Studies on the use of BTH in the control of pests seem limited. In this study, Dekalp corn (Zea mays Linnaeus (Poales: Poaceae)) variety was applied foliar with an extract produced by an environmentally friendly-botanical plant activator (BİON MX 44 WG) (% 4 Acibenzolar-S-methyl, water dispersible granule) which contained BTH. This study is aimed to investigate the repellent effects of the applied extract on the herbivorous insect Cicadulina spp. Naudé (Hemiptera: Cicadellidae). The study was conducted in 2017 and 2018, with 4 repetitions, according to the randomized blocks trial design, in line with this purpose also the study was carried out in the experimental area of Harran University Faculty of Agriculture Osmanbey Campus in the corn fields. The population tracking of pest Cicadulina spp. adults was done by yellow sticky traps, atrap, and by eyes every week. Accordingly, as a result of the evaluation made in the study, in both years, it was determined that the extract application formed with plant activator which containing BTH attracted statistically significantly fewer Cicadulina spp. adults than the control application. In addition, a specific volatile-aromatic substance obtained from BTH treated leaf samples as a result of GC-MS analysis, has also been determined that it may play a role in the repellent effect mechanism on Cicadulina spp.

Keywords

• BTH
• direct resistance
• repellent effect
• alternative control
• corn

Acibenzolar-S-methyl (BTH) içeren bir bitki aktivatörünün Cicadulina spp. Naudé (Hemiptera: Cicadellidae) üzerindeki repellent etkisinin belirlenmesi

Abstract

Acibenzolar-S-methyl (BTH), bitkilerde zararlı böceklere karşı dayanıklılık veya savunmanın tetiklenmesinde ticari olarak kullanılan, yeni nesil etkili maddelerin ilk temsilcilerinden birisidir. BTH’ın zararlı böceklerin kontrolünde kullanımı hakkında yapılan çalışmalar sınırlı görünmektedir. Bu çalışmada, Dekalp mısır (Zea mays Linnaeus (Poales: Poaceae)) çeşidi, çevre dostu-bitkisel BTH içerikli bir bitki aktivatörü (BİON MX 44 WG) (% 4 Acibenzolar-S-methyl, suda dağılabilen granül) aracılı olarak oluşturulan ekstrakt ile yapraktan uygulanmıştır. Bu çalışmada uygulanan ekstraktın herbivor böcek, Cicadulina spp. Naudé (Hemiptera: Cicadellidae) üzerindeki repellent etkisinin araştırılması hedeflenmiştir. Çalışma, bu amaca uygun olarak tesadüf blokları deneme desenine göre 4 tekerrürlü olarak, 2017 ve 2018 yıllarında, Harran Üniversitesi Ziraat Fakültesi Osmanbey Kampüsü deneme alanında, mısır tarlalarında yürütülmüştür. Zararlı böcek Cicadulina spp. erginlerinin populasyon takibi her hafta yenilenen sarı yapışkan tuzaklar + göz + atrap aracılığıyla yapılmıştır. Buna göre, çalışmada yapılan değerlendirme sonucunda, her iki yılda da BTH içerikli bitki aktivatörü ile oluşturulan ekstrakt uygulamasının, kontrol uygulamaya göre istatistiki olarak önemli ölçüde daha az sayıda Cicadulina spp. ergin bireyleri çektiği tespit edilmiştir. Ayrıca, BTH muameleli yaprak örneklerinden GC-MS analizi sonucu elde edilen spesifik bir uçucu-aromatik maddenin, Cicadulina spp. üzerindeki repellent etki mekanizmasında rol alabileceği de belirlenmiştir.

Keywords

• BTH
• doğrudan dayanıklılık
• repellent etki
• alternatif mücadele
• mısır

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