African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6638

Full Length Research Paper

Taxonomy and morphology of Colletotrichum truncatum isolates pathogenic to soybean

Jagtap, G. P and Sontakke P. L.
Department of Plant Pathology, College of Agriculture, Marathwada Agricultural University, Parbhani-431402 (Maharashtra) India.
Email: [email protected]

  •  Accepted: 09 November 2009
  •  Published: 31 December 2009

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.