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Incidence and etiology of mouldy core and core rot of apple in Shimla district, Himachal Pradesh.

2017; Volume: 7; Issue: 2 Linguagem: Inglês

2250-0499

Hans Raj, J. N. Sharma,

Banana Cultivation and Research

The investigations on the incidence and etiology of mouldy core and core rot of apple causing pre-harvest fruit drop in major apple growing belts in Shimla district of Himachal Pradesh were conducted during 2009 cropping season. Highest incidence (17.7%) of mouldy core and core rot of apple in dropped as well as intact fruits was found in the Kotkhai region of the Shimla district followed by Rohroo (16.6%) and Thanedhar (15.5%) while least was observed in Jubbal area. The percentage incidence of mouldy core and core rot of apple was more in the dropped (30.1 and 17.1%) fruits as compared to the intact ones (12.4 and 5.1%). Alternaria alternata was the predominant fungal pathogen isolated from the infected fruits. In a few cases Trichothecium roseum was observed as a secondary pathogen causing dry rot symptoms. Artificial inoculation of the mature fruits through calyx tube showed 100 per cent rotting after 25 days of inoculation.