Desenvolvimento floral e produ？？o de pessegueiros 'granada' sob distintas condi？？es climáticas

the peach cultivar granada is showing low fruit set and irregularity of yield in major producing regions of peach fruit in rio grande do sul state, brazil. this work aimed to compare the floral development and yield of 'granada' peach tree in two regions with different climatic conditions. the orchards studied, in 2004 and 2005, are located in charqueadas, in the central depression, and cangu？u, in the southern state. the low yield and viability of pollen, associated to delay in the ovules development, mainly influenced by high temperatures during the pré-flowering and flowering, were the causes of low reproductive and productive performance of 'granada' peach tree at charqueadas in 2004 and at cangu？u in 2005.