Evaluate the Efficacy of Different Dose of New Synthetic and Botanical Fungicides Against Brown Spot (Bipoloris Oryzae) Disease of Rice Under Field Condition
Rajendra Persaud*, Akeim Casey and Mahendra Persaud
ABSTRACT
Bipolaris oryzae is the causal agent of rice brown spot disease and is responsible for significant economic losses. In order to control this disease, three new synthetics fungicide viz. Top Cop (Sulphur 50%, metallic copper equivalent 4.4%), Droxide (Cupric hydroxide), and Onix (Carbendazim 12.50%, Propoconozole 12.50%), and one botanical fungicide viz. Sporan (Rosemary oil 16%, Clove oil 10%, Thyme oil 10%, Peppermint oil 2%), at varying rates were along with two positive checks, Saaf (Mancozem 63%, Carbendazim 12%) at 300g/ac. and Fugi One (Isoprothiolane 40% SC) at 300 ml/ac. and a untreated control were evaluated for their effectiveness in managing the brown spot disease. The experiment was conducted under field conditions within the Plant Pathology experimental area at the Rice Research Station, Burmaduringfirst and second crop of 2022 and 2023. The experimental design used is an RCBD with 4 replications. Results for the 4 seasons of trials showed that treatments with Top Cop at 250ml/ac, Droxide at 250g/ac, Sporan at 600ml/ac, Onix at 250ml/ac demonstrated consistent superior levels of control and reduction in brown spot disease severity when compared to the untreated control similar to the two (2) positive fungicidal checks, Saaf 300g/ac and Fugi One at 300 ml/ac. under field conditions. Also, the said treatments demonstrated positive influence in terms of plant growth, yield parameters and overall grain yields were reported. Therefore, these four (4) new fungicides viz. Top Cop at 250ml/ac, Droxide at 250g/ac, Sporan at 600ml/ac, Onix at 250ml/ac. can be recommended for the management of brown spot disease.
