Assessment of weather parameters effect and phenology of mango cultivars in south Gujarat of India

The present investigation was conducted at Navsari Agricultural University, Navsari (Gujarat, India) during two consecutive seasons (2019-20 and 2020-21)to determine the degree of correlation between climatic parameters and duration for different phenophases in seven mango varieties viz., Sonpari, Alphonso, Amrapali, Kesar, Dashehari, Totapuri and Rajapuri. Climatic parameters viz. temperature, relative humidity,wind velocity, bright sunshine hours and rainfallwere considered as independent variables and different phenological stages viz., days to FBD, panicle initiation, flower opening, grain stage fruits, pea stage fruits, marble stage fruits and maturity as dependent variables. Results revealed that, climatic parameters viz., temperature (maximum and minimum), relative humidity (maximum and minimum)and bright sunshine hours (day^-1) were significantly negatively correlated with days to FBD, pea stage fruits, marble stage fruits and mature stage fruits. However, none of the climatic parameter produced its significant correlation for days to gain stage fruits. It was also observed that, extended rainfall delayed flower bud differentiation and temperature fluctuations during panicle initiation, adversely affected its occurrence.