Bacillus spp. konsorsiyumunun mor leke (Alternaria porri (Ellis) Cif.) hastalığının biyolojik kontrol ajanı olarak potansiyeli ve arpacık soğanı büyümesi ve üretiminin artırılması

Öz

Alternaria porri'nin neden olduğu mor leke hastalığı, arpacık soğanı bitkileri için önemli bir tehdit oluşturmakta ve potansiyel olarak %40'a varan verim kayıplarına yol açmaktadır. Bu sorunun ele alınması, tarımsal verimliliğin sürdürülmesi ve gıda güvenliğinin sağlanması açısından hayati önem taşımaktadır. Mor leke hastalığının kontrolüne yönelik umut vadeden bir yaklaşım, uygun maliyetli ve çevre dostu bir çözüm sunan Bacillus spp. konsorsiyumunun kullanılmasıdır. Yakın zamanda yapılan bir çalışmada, araştırmacılar A. porri'yi kontrol altına alırken aynı zamanda arpacık soğanı bitkilerinin büyümesini ve verimini de artıran en etkili Bacillus spp. konsorsiyumunu belirlemeyi amaçlamıştır. Çalışmada, yedi uygulama ve beş tekerrürden oluşan tamamen tesadüfi tasarım (CRD) kullanılmıştır. Bu uygulamalar, pozitif ve negatif kontrollerin yanı sıra çeşitli Bacillus strainlerinin kombinasyonlarını ve %80 oranında mancozeb içeren bir fungisiti içermektedir. Çalışmanın sonuçları, B. pseudomycoides EPL 1.1.4 + B. cereus TLE 2.3 + B. cereus TLE 1.1 + B. cereus SNE 2.2'den oluşan konsorsiyum uygulamasının mor nokta hastalığının gelişimini azaltmada en etkili olduğunu göstermiştir. Bu uygulama %17.00 hastalık insidansı ve %13.33 hastalık şiddeti göstermiştir. Dahası, konsorsiyum uygulaması arpacık soğanı bitkilerinin büyümesini ve üretimini önemli ölçüde teşvik etmiştir. Özellikle, bu konsorsiyum ile tedavi edilen bitkiler bitki boyu, yaprak sayısı ve hem taze hem de kuru soğan ağırlıklarında dikkate değer bir artış göstermiştir. Geliştirilmiş büyüme parametreleri arasında 49.83 cm bitki boyu, 53.33 şerit yaprak sayısı ve sırasıyla 127.08 g ve 96.65 g taze ve kuru soğan ağırlığı yer almıştır.

Anahtar Kelimeler

• Alternaria porri
• arpacık soğanı
• mor leke
• konsorsiyum

Potential of a Bacillus spp. consortium as a biological control agent of purple spot (Alternaria porri (Ellis) Cif.) and enhancement of shallot growth and production

Abstract

Purple spot disease caused by Alternaria porri poses a significant threat to shallot plants, potentially leading to yield reductions of up to 40%. Addressing this issue is crucial for maintaining agricultural productivity and ensuring food security. One promising approach to controlling purple spot disease is the utilization of Bacillus spp. consortium, which offers a cost-effective and environmentally friendly solution. In a recent study, researchers aimed to identify the most effective Bacillus spp. consortium for controlling A. porri while also enhancing the growth and yield of shallot plants. The study was employed a completely randomized design (CRD) with seven treatments and five replicates. These treatments included various combinations of Bacillus strains along with positive and negative controls and a fungicide containing mancozeb 80%. The results of the study demonstrated that the consortium treatment consisting of B. pseudomycoides EPL 1.1.4 + B. cereus TLE 2.3 + B. cereus TLE 1.1 + B. cereus SNE 2.2 was the most effective in reducing purple spot disease development. This treatment exhibited a disease incidence of 17.00% and disease severity of 13.33%. Moreover, the consortium treatment significantly promoted the growth and production of shallot plants. Specifically, plants treated with this consortium exhibited a notable increase in plant height, leaf number, and both fresh and dry bulb weights. The enhanced growth parameters included a plant height of 49.83 cm, a number of leaves of 53.33 strands, and fresh and dry bulb weights of 127.08 g and 96.65 g, respectively.

Keywords

• Alternaria porri
• shallot
• purple spot
• consortium

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