Thermal requirement for phenophases of mango varieties in the subhumid tropics of east-central India Ramteke Vikas*, Sanadya A., Kumar Narendra, Kerketta A. K. Shaheed Gundadhur College of Agriculture and Research Station, Indira Gandhi Krishi Vishwavidyalaya, Jagdalpur- 494001, Chhattisgarh, India *Corresponding author: ramtekeviks@gmail.com
Online Published on 23 December, 2022. Abstract Mango flowering and fruiting phenophases are influenced by both genetics and environmental factors. An experiment was conducted with nine mango varieties at Jagdalpur during 2018–2020 to study the influence of heat units, photothermal units and heliothermal units on phenology of mango varieties. The growing degree days, heliothermal unit and photothermal unit were recorded lower for many phenophases of early maturing varieties like Dasheheri, Alphonso and Mahmood Bahar. Majority of phenophases showed higher heat use efficiency for Sundreja and lowest for Mahmood Bahar. Days taken to panicle emergence toappearance of 50% flowering, days to 50% flowering to full bloom and days to full bloom to first fruit set, all have a significant negative correlation with heat use efficiency. All the phenophases were positively correlated to growing degree days. Top Keywords Mangifera indica L., Growing degree days, Heliothermal unit, Heat use. Top |