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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.
*Corresponding author. E-mail:
drgpjagtap@gmail.com.
Accepted
9 November, 2009 |
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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.
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