A study on pH affecting on Sclerotium rolfsii causing Root rot on Chilli
Keywords:
Sclerotium rolfsii, pH, Scleroia, Radial mycelial growthAbstract
The chilli rot is one of the most destructive diseases caused by Sclerotium rolfsii in fields. The pathogen is well known. The mycelial growth and sclerotia production of Sclerotium rolfsii is influenced by many factors including pH. The influence of different pH levels on growth and production of sclerotia was studied by poisoning food technique. In the present studied citrate-phosphate buffer solution with pH values ranging from 3.0, 3.5, 4.0, 4.5, 5.0, .5.5, 6.0, 6.5 and 7.0 were used. The total and average radial growth observed after every 24 hours interval and recorded. The lowest radial growth 55.00 mm and was at recorded at 7.0 pH followed by 3.0 pH level with 70.2 mm after 72 hours of incubation periods. Among all pH levels the highest radial growth were found as 88.33mm on both 4.5 & 5.0 pH levels.
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