ISSN 2167-0447
International Journal of Agricultural Sciences ISSN: 2167-0447 Vol. 9 (4), pp. 001-005, April, 2019. © International Scholars Journals
Full Length Research Paper
Taxonomy and morphology of Colletotrichum truncatum isolates pathogenic to Soybean
G. P. Jagtap* and P. L. Sontakke
Department of Plant Pathology, College of Agriculture, Marathwada Agricultural University, Parbhani-431402 (Maharashtra), India.
Accepted 19 November, 2018
Abstract
The morphology of both conidia and setae of Colletotrichum truncatum (Schw.) Andrus and Moore isolates from soybean were compared and found to be distinct. Conidial shape was more useful than size in isolate determination. Average conidial length was maximum (26.46 µm) in isolate Ct-1 followed by Ct-2 (23.75 µm), Ct-4 (22.25 µm), Ct-3 (21.72 µm), Ct-5 (20.72µm) and Ct-6 (18.81 µm), whereas the width was maximum (4.63 µm) in isolate Ct-3 followed by Ct-2 (4.12 µm), Ct-4 (3.92 µm), Ct -5 (3.86 µm), Ct-1 (3.67 µm) and Ct-6 (3.56 µm). Average setal length was maximum (166.65 µm) in isolate Ct-1 followed by Ct-2 (122.16 µm), Ct -3 (61.73 µm), Ct-4 (52.58 µm), Ct-5 (47.83 µm) and Ct -6 (44.36 µm) whereas the width was maximum (5.50 µm) in isolate Ct-1 followed by Ct-6 (5.39 µm), Ct-4 (5.37 µm), Ct-5 (5.22 µm), Ct-2(5.07 µm) and Ct-3 (4.92 µm). Total number of setae per fascile was maximum in isolate Ct-1 (158) followed by Ct-3 (125), Ct-4 (115), Ct-5(105), Ct-2 (95) and Ct-6 (48).
Key words: Colletotrichum truncatum, soybean, conidial, setal.