Evaluation of a New Strobilurin Group of Fungicide for the Management of Blast Disease of Paddy
D. Pramesh *
Department of Plant Pathology, University of Agricultural Sciences, Raichur, Karnataka, India.
K. Nataraj
M/s. BASF India Ltd, Navi Mumbai, India
G. S. Guruprasad
Department of Agricultural Entomology, University of Agricultural Sciences, Raichur, Karnataka, India.
K. Mahantashivayogayya
Department of Genetics and Plant Breeding, University of Agricultural Sciences, Raichur, Karnataka, India.
B. G. M. ReddY
Department of Agronomy, University of Agricultural Sciences, Raichur, Karnataka, India.
*Author to whom correspondence should be addressed.
Abstract
A new strobilurin group of fungicide, pyraclostrobin 100 g/l CS (Seltima 100 g/l CS) was evaluated for its bio-efficacy against rice leaf blast disease under field condition during Kharif 2013 and 2014 at Agricultural research station, Gangavathi, Karnataka, India. The test fungicide, pyraclostrobin 100 g/l CS was found effective against leaf blast disease which recorded least percent disease index (PDI) of 14.20 and 16.48 @ 75 g a.i./h and @ 100 g a.i./h, respectively. Other fungicides such as tricyclazole 75 WP (300 g/h), Carbendazim 50 WP (500g/h) and Isoprothiolane 40 EC (750 ml/h) recorded significantly more PDI than pyraclostrobin 100 g/l CS. Due to difference in the PDI of leaf blast disease, different treatments recorded statistically significant yield differences. The highest yield (67.78 q/h) was recorded in the treatment of pyraclostrobin 100 g/l CS @ 75 g a.i./h followed by the same chemical @ 100 g a.i./h (66.87 q/h). Therefore, pyraclostrobin 100 g/l CS (Seltima 100 g/l CS) @ 75-100 g a.i/h can be used for effective management of leaf blast disease.
Keywords: Leaf blast, pyraclostrobin 100 g/l CS; PDI, tricyclazole 75 WP