Annals of Plant Protection Sciences
  • Year: 2015
  • Volume: 23
  • Issue: 1

Morphological and pathogenic variability in Alternaria alternata causing leaf spot of Aloe vera (Aloe barbadensis Mill.)

  • Author:
  • R.S. Sharma, K. Bhatnagar, Pankaj Sharma1,
  • Total Page Count: 4
  • Page Number: 90 to 93

1Maharana Pratap University of Agriculture and Technology, Udaipur-313 001

Agricultural Research Station (SK RAU), Jaipur-302 016

*Present address: ICAR-Directorate of Rapeseed-Mustard Research, Bharatpur-321 303, Rajasthan, India <pksvirus@gmail.com>

Online published on 2 April, 2015.

Abstract

Among five different isolates collected 2006–07, isolates from Ramjipura (AL2) and Boraj (AL3) exhibited excellent sporulation with a mean colony diameter 48.90 mm and 46.50 mm, respectively. Ramgarh (AL5) isolate showed poor sporulation with 43.50 mm colony diameter. Isolate collected from Renwal (AL1) showed maximum length of spore (48.80 μm) followed by Boraj (AL3) and Ramjipura (AL2). The maximum width of spores (17.95 μm) was observed in Renwal (AL1) followed by Ramjipura (AL2) and Boraj (AL3) isolates. The pathogen also showed pathogenic variability, mean infection percentage was highest (70.0%) in Ramjipura (AL2) followed by Boraj (AL3), and Renwal (AL1) isolates.

Keywords

Aloe vera, Alternaria alternata, Pathogenic variability