Journal of Biological Control

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Application of bioagents/organic preparations for the management of Eumusae leaf spot disease of French plantain cultivar Nendran (Musa AAB) in Kerala


Affiliations
1 Department of Plant Pathology, College of Horticulture, Kerala Agricultural University, Vellanikkara, Thrissur – 680656, Kerala, India
 

The efficacy of bioagents/organic preparations viz., cow dung extract + Pseudomonas fluorescens (1%), PGPR mix II (2%), P. fluorescens (2%), turmeric powder + baking soda mixture (5:1 per litre of water), salicylic acid (25ppm), KAU micronutrient multimix (Sampoorna) (1%), petroleum based mineral oil (0.1%) along with chemical check Bordeaux mixture (1%) and control were tested for the management of Eumusae leaf spot disease of French plantain cultivar Nendran (Musa AAB). A field experiment was laid in the hotspot area of this disease at Banana Research Station, Kannara, Kerala during May 2016-2017 in Randomized Block Design (RBD) with nine treatments replicated thrice with nine plants per replication. The observations like Per cent Disease Severity (PDS), Youngest Leaf Spotted (YLS), Disease Development Time (DDT), vegetative and yield parameters were recorded. The results of the field experiments revealed that all the bioagents/organic preparations were equally effective in suppressing the disease when compared to the chemical check (Bordeaux mixture, 1%). Among the bioagents/organic preparations evaluated, the lowest per cent disease severity (PDS) of 20.93 per cent was recorded in plants sprayed with PGPR mix II (2%). While the maximum Disease Development Time (DDT) of 43 days and the highest (6.69) youngest leaf spotted were recorded in plants treated with turmeric powder + baking soda mixture (5:1) and Pseudomonas fluorescens (2%) respectively. The yield in terms of bunch weight was recorded highest (8.47 kg) in plants applied with P. fluorescens (2%) which was closely followed by PGPR mix II having a bunch weight of (7.93 kg). The study revealed that foliar spraying of PGPR mix II (20g/l) and P. fluorescens (20g/l) four times starting from the initial appearance of the disease on the lowest leaves of 75 per cent plants was safe and effective for the management of Eumusae leaf spot disease of banana

Keywords

Disease development time, Eumusae leaf spot, per cent disease severity, PGPR mix II
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  • Application of bioagents/organic preparations for the management of Eumusae leaf spot disease of French plantain cultivar Nendran (Musa AAB) in Kerala

Abstract Views: 253  |  PDF Views: 143

Authors

Milsha George
Department of Plant Pathology, College of Horticulture, Kerala Agricultural University, Vellanikkara, Thrissur – 680656, Kerala, India
K. Anita Cherian
Department of Plant Pathology, College of Horticulture, Kerala Agricultural University, Vellanikkara, Thrissur – 680656, Kerala, India

Abstract


The efficacy of bioagents/organic preparations viz., cow dung extract + Pseudomonas fluorescens (1%), PGPR mix II (2%), P. fluorescens (2%), turmeric powder + baking soda mixture (5:1 per litre of water), salicylic acid (25ppm), KAU micronutrient multimix (Sampoorna) (1%), petroleum based mineral oil (0.1%) along with chemical check Bordeaux mixture (1%) and control were tested for the management of Eumusae leaf spot disease of French plantain cultivar Nendran (Musa AAB). A field experiment was laid in the hotspot area of this disease at Banana Research Station, Kannara, Kerala during May 2016-2017 in Randomized Block Design (RBD) with nine treatments replicated thrice with nine plants per replication. The observations like Per cent Disease Severity (PDS), Youngest Leaf Spotted (YLS), Disease Development Time (DDT), vegetative and yield parameters were recorded. The results of the field experiments revealed that all the bioagents/organic preparations were equally effective in suppressing the disease when compared to the chemical check (Bordeaux mixture, 1%). Among the bioagents/organic preparations evaluated, the lowest per cent disease severity (PDS) of 20.93 per cent was recorded in plants sprayed with PGPR mix II (2%). While the maximum Disease Development Time (DDT) of 43 days and the highest (6.69) youngest leaf spotted were recorded in plants treated with turmeric powder + baking soda mixture (5:1) and Pseudomonas fluorescens (2%) respectively. The yield in terms of bunch weight was recorded highest (8.47 kg) in plants applied with P. fluorescens (2%) which was closely followed by PGPR mix II having a bunch weight of (7.93 kg). The study revealed that foliar spraying of PGPR mix II (20g/l) and P. fluorescens (20g/l) four times starting from the initial appearance of the disease on the lowest leaves of 75 per cent plants was safe and effective for the management of Eumusae leaf spot disease of banana

Keywords


Disease development time, Eumusae leaf spot, per cent disease severity, PGPR mix II

References





DOI: https://doi.org/10.18311/jbc%2F2020%2F25206