International Journal of Plant Protection

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Cultural and Morphological Variations among the Isolates of Sclerotinia sclerotiorum (Lib.) De Bary Causing Sclerotinia Stem Rot


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1 Department of Plant Protection, Aligarh Muslim University, Aligarh (U.P.), India
     

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Sclerotinia stem rot caused by Sclerotinia sclerotiorum (Lib.) de Bary is one of the most serious and damaging disease of many important crops and weeds worldwide. It causes considerable yield losses in quality and quantity of crop produce. In present study, Eleven isolates of Sclerotinia sclerotiorum were collected from different host plants and studied for their cultural and morphological variations. The observations of study revealed that all isolates varied in their cultural characters viz., colony growth (mm), colony appearance (colour and type of growth) and morphological characters viz., initiation, size and number of sclerotia. Among different isolates, carrot isolate (75.86 mm) was found significantly fast growing followed by brinjal isolate (70.96 mm), while potato isolate (57.13 mm) grown slowly in potato dextrose agar medium at 72 hours after inoculation. Maximum number of sclerotia (34.66) was produced in tomato isolate, whereas, minimum (4.33) in parthenium isolate. Largest size of sclerotia (9x4.66 mm) was observed in tomato isolate however, smallest size of sclerotia (2.0x2.0 mm) were produced in lentil and parthenium isolates.

Keywords

Sclerotinia sclerotiorum, Isolates, Cultural, Morphological Variations.
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  • Cultural and Morphological Variations among the Isolates of Sclerotinia sclerotiorum (Lib.) De Bary Causing Sclerotinia Stem Rot

Abstract Views: 292  |  PDF Views: 0

Authors

Devesh Pathak
Department of Plant Protection, Aligarh Muslim University, Aligarh (U.P.), India
R. U. Khan
Department of Plant Protection, Aligarh Muslim University, Aligarh (U.P.), India
Vaibhav Pratap Singh
Department of Plant Protection, Aligarh Muslim University, Aligarh (U.P.), India

Abstract


Sclerotinia stem rot caused by Sclerotinia sclerotiorum (Lib.) de Bary is one of the most serious and damaging disease of many important crops and weeds worldwide. It causes considerable yield losses in quality and quantity of crop produce. In present study, Eleven isolates of Sclerotinia sclerotiorum were collected from different host plants and studied for their cultural and morphological variations. The observations of study revealed that all isolates varied in their cultural characters viz., colony growth (mm), colony appearance (colour and type of growth) and morphological characters viz., initiation, size and number of sclerotia. Among different isolates, carrot isolate (75.86 mm) was found significantly fast growing followed by brinjal isolate (70.96 mm), while potato isolate (57.13 mm) grown slowly in potato dextrose agar medium at 72 hours after inoculation. Maximum number of sclerotia (34.66) was produced in tomato isolate, whereas, minimum (4.33) in parthenium isolate. Largest size of sclerotia (9x4.66 mm) was observed in tomato isolate however, smallest size of sclerotia (2.0x2.0 mm) were produced in lentil and parthenium isolates.

Keywords


Sclerotinia sclerotiorum, Isolates, Cultural, Morphological Variations.

References