Vol. 11, Issue 11 (2022)

Author(s):
Premalatha BR, Shivaramu HS, Thimmegowda MN and Prasanna Kumar MK

Abstract:
A field experiment was carried out to investigate the influence of tree age and management practices on incidence of stem end rot in mango cv Alphonso of Eastern dry zone of Karnataka during 2018-19 and 2019-20. The experiment comprised of two mango orchards of different age groups i.e., A₁- 10 years aged trees at Regional Horticultural Research and Extension Centre (RHREC), College of Horticulture, UHS campus, GKVK and A₂- 25 years aged trees at Dryland Agriculture Project (DLAP), GKVK, Bengaluru with two management levels: M₁- Control and M₂-With plant protection chemicals (*: Two sprays comprising of Hexaconazole 5% SC @ 1 ml/litre and Wettable Sulphur 80% WP @ 2 g/litre were given at the time of flower bud initiation and fruiting stage). The study revealed that the disease severity of the SER and percentage of fruit infested by the pathogen was observed in both 10 and 25 years old tree but it was non-significant. However, highest disease severity was observed in case of 10 years old trees (49.00 ± 31.44%) compared to 25 years old trees (35.50 ± 29.02%). While, significant differences were observed in case of fungicide treated trees, where the disease severity was significantly higher in the untreated trees (49.00 ± 31.44% and 35.50 ± 29.02% in 10 and 25 year old trees, respectively) than fungicide treated trees (11.00 ± 13.65% and 18.00 ± 23.68% in 10 and 25 year old trees, respectively).