Walnut grafting as influenced by environment conditions and rootstocks

Results revealed that the graft success was maximum in polyhouse environment followed by hot callusing cable (HCC) system. The maximum graft success was recorded on thick rootstocks followed by medium and thin rootstock. Hard shell and soft shell rootstocks were found statistically at par in respect to graft success. Shoot length, rootstock girth at crown level and scion girth above union were found significantly superior under polyhouse over the HCC. Similar results were obtained when thick rootstocks were used for grafting. Soft shell rootstocks were found significantly superior over hard shell ones in respect of scion length, rootstock girth and scion girth. Maximum graft success was obtained under polyhouse from medium rootstocks. The open field conditions proved inferior to polyhouse and hot callusing cable (HCC) system.