Domateste biyofungisit (Trichoderma spp.) kullanılarak Mısırlı canavar otu [Phelipanche aegyptiaca (Pers.) Pomel]’nun ücadelesi

Öz

Mısırlı canavar otu olarak bilinen Phelipanche aegyptiaca (Pers.) Pomel, domates üretiminde önemli verim kayıplarına neden olan kök paraziti bir bitkidir. Bu çalışmada, Trichoderma asperellum ICC012 ve Trichoderma gamsii ICC080 suşlarını içeren ticari bir biyolojik ürünün domateste canavar otu üzerindeki etkinliği değerlendirilmiştir. Deneme, ürünün üç farklı konsantrasyonunda (N: tavsiye dozu, N/2 ve 3N/2) uygulanmasıyla, tesadüf blokları deneme desenine göre dört tekerrürlü olarak kurulmuş ve kontrollü sera koşullarında yürütülmüştür. Uygulamalar iki programda gerçekleştirilmiştir: Program A (fide dikimden bir hafta önce ve bir gün sonra) ve Program B (fide dikiminden 15 gün sonra ek bir uygulama). Sonuçlar, biyolojik kontrol ajanı (BCA) uygulamalarının P. aegyptiaca sürgünlerinde hastalık şiddetini önemli ölçüde artırdığını, bu değerlerin kontroldeki %40’a kıyasla %69.5 ile %79.6 arasında değiştiğini göstermiştir. Nekrotik alandaki en yüksek skala değerini alan sürgün sayısı, kontrolde ortalama üç iken BCA uygulaması yapılan saksılarda ortalama 17-19.5 ile önemli ölçüde artmıştır. Ayrıca, BCA uygulanan saksılarda ölü tüberküllerin ortalama sayısı 32 iken, uygulama yapılmayan saksılarda 16 olarak belirlenmiştir. BCA uygulanan canavar otu sürgünlerinin yaş ağırlığı kontrole göre önemli bulunurken, kuru sürgün ağırlığında hiçbir uygulama arasında önemli bir fark bulunmamıştır. Domates bitkisinin büyüme parametrelerinde kontrole kıyasla önemli bir fark gözlemlenmemiştir. Bu sonuçlar, Trichoderma türlerinin çoklu mekanizmalarla canavar otunu kontrol edebileceğini düşündürmektedir. Bu bulguların doğal koşullarda doğrulanması için saha denemelerinin yapılması gerekmektedir.

Anahtar Kelimeler

• domates
• Phelipanche aegyptiaca
• Trichoderma spp.
• biyolojik kontrol ajanı

Management of Egyptian broomrape [Phelipanche aegyptiaca (Pers.) Pomel] using biofungicide (Trichoderma spp.) in tomato

Abstract

Phelipanche aegyptiaca (Pers.) Pomel, commonly known as Egyptian broomrape, is a root parasitic plant that causes significant yield losses in tomato production. This study aimed to evaluate the efficacy of a commercial bioproduct containing Trichoderma asperellum strain ICC012 and Trichoderma gamsii strain ICC080, against P. aegyptiaca in tomato. The experiment was conducted under controlled greenhouse conditions using three concentrations of the bioproduct (N: recommended dose, N/2, and 3N/2) in a randomized block design with four replications. Applications were made in two programs: Program A (one week before and one day after planting) and Program B (an additional application 15 days after planting). Results showed that the biological control agent (BCA) applications significantly increased disease severity in P. aegyptiaca shoots, with the values ranging from 69.5% to 79.6%, compared to 40% in the control. The number of shoots exhibiting the highest scale value on necrotic area increased significantly from three in the control to 17-19.5 in BCA-treated pots. Additionally, the average number of dead tubercles on tomato roots was 32 in BCA-treated pots, compared to 16 in untreated controls. The fresh weight of BCA-treated broomrape shoots was significantly different from the control, while there was no significant difference in the dry weight of the shoots among treatments. BCA did not significantly alter the weights of aerial parts and the roots of tomato compared to the control. These results suggest that Trichoderma species can control broomrape through multiple mechanisms. Further field trials are recommended to validate these findings under natural conditions.

Keywords

• tomato
• Phelipanche aegyptiaca
• Trichoderma spp.
• biological control agent

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