Trends in Biosciences
  • Year: 2015
  • Volume: 8
  • Issue: 24

Studies on effect of ph, temperature and relative humidity on growth and sporulation of Alternaria alternate and Sclerotium rolfsii causing bud rot and collar rot in marigold

  • Author:
  • M. K. Rout*,1, P. Mohanty1, S.R. Dash3, D. Parida1
  • Total Page Count: 3
  • Page Number: 6785 to 6787

1Krishi Vigyan Kendra, Kendrapara-754211, Odisha

3Krishi Vigyan Kendra, Jagatsinghpur- Odisha

Orissa University of Agriculture and Technology, Bhubaneswar, Odisha.

*email: routmanoj6@gmail.com

Online published on 22 September, 2017.

Abstract

In this investigation physiological studies are carried out for two fungi Alternaria alternate and Sclerotium rolfsii causing important diseases like bud rot and collar rot in marigold. Both the fungi grew well in PDA media and a temperature of 25-300c was found suitable for their growth and sporulation. Alternaria alternata grew in acidic pH and Sclerotium rolfsii grows best in pH 6–7.Sclerotium rolfsii grows best at high moisture levels and with lower humidity levels both growth and sclerotia production reduces.

Keywords

Effect of Ph, temperature and relative humidity, growth and sporulation, Alternaria alternate, Sclerotium rolfsii, bud rot, collar rot, marigold