Bazı Entomopatojenik Fungusların Zea mays L. ve Helianthus annuus L.'nin Büyümesi Üzerindeki Etkisi

Abstract

Geleneksel insektisitlere umut verici bir alternatif olan entomopatojenik funguslar, bitki zararlı popülasyonlarının azaltılması için biyokontrol ajanları olarak yaygın olarak kullanılmaktadır. Ayrıca, son çalışmalar, entomopatojenik fungusların bitkilerde büyümeyi teşvik edici özelliklere de sahip olduğunu göstermiştir. Bu araştırmanın amacı, yerli entomopatojenik fungus suşları olan Beauveria bassiana Pa4, Cordyceps fumosorosea KTU-42 ve Metarhizium flavoviride As-18'in ayçiçeği ve mısırın çimlenme ve erken gelişme periyodu üzerindeki etkilerini değerlendirmektir. Bu çalışmada, EPF uygulamasının mısırda tohum çimlenme yüzdesini etkilemediği ancak ayçiçeği tohumlarının çimlenme yüzdesini artırdığı tespit edilmiştir. Ayçiçeği örneklerinde M. flavoviride uygulamasının diğer EPF uygulamalarına ve kontrole göre kök-gövde ağırlığını, kök uzunluğunu, gövde çapını ve biyokütleyi önemli ölçüde arttırdığı belirlendi. Mısırda ise EPF uygulamalarının sadece kök uzunluğuna olumlu etki yaptığı belirlendi. Mısır bitkilerinde büyümeyi arttırmada en etkili mantar C. fumosorosea KTU-42 oldu. Ayçiçeği bitkilerinde ise M. flavoviride As-18 ile aynı sonuç elde edilmiştir. Bu çalışma, bu mantarların bitki gelişimini desteklediğini ve zararlı yönetiminin yanı sıra bitki üretiminde önemli bir faktör olarak görülmesi gerektiğini bildirmiştir.

Keywords

• Entomopatojen fungus
• Çimlenme
• Bitki büyümesi
• Mısır
• Ayçiçeği

Impact of Some Entomopathogenic Fungi on the Growth of Zea mays L. and Helianthus annuus L.

Abstract

Entomopathogenic fungi, a promising alternative to conventional insecticides, have been widely used as biocontrol agents for the regulation of pest populations. Furthermore, recent studies have shown that entomopathogenic fungi also have growth-promoting properties in plants. The purpose of this investigation was to assess the effects of indigenous entomopathogenic fungi strains, Beauveria bassiana Pa4, Cordyceps fumosorosea KTU-42, and Metarhizium flavoviride As-18, on the germination and early development period of sunflower and maize plants. In this study, it was determined that EPF application did not affect the seed germination percentage in maize, but increased the germination percentage of sunflower seeds. It was determined that M. flavoviride application significantly increased root-stem weight, root length, stem diameter and biomass in sunflower samples compared to other EPF applications and control. In maize, it was determined that EPF applications had a positive effect only on root length. The most effective fungus to increase growth on maize plants was C. fumosorosea KTU-42. On the other hand, the same result was obtained with M. flavoviride As-18 on sunflower plants. The present study reported that these fungi promote plant development and should be considered an important factor in plant production besides pest management.

Keywords

• Entomopathogen fungus
• Germination
• Plant growth
• Maize
• Sunflower

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