Effect of defoliation, decapitation and deblossoming on fruit bud
differentiation in guava (Psidium guajava L.).
Singh,Singh, A. K.,Rajan, S.
Institute for Subtropical Horticulture, Rehmankhera, P.O. Kakori,
Lucknow 227107, India
Complete removal of leaves, along with decapitation of shoots, promoted
flower bud differentiation (FBD), while ringing with partial or complete
defoliation along with decapitation of shoots did not promote FBD.
Decapitation of leafy shoots also promoted FBD, increasing from 44 to
63% and 37 to 54% in Sardar and Allahabad Safeda, respectively.
Defoliation of same age shoots (1-3 months old) at different times of
the year influenced FBD. In many cases, defoliation did not promote
flowering compared with controls. Principal component analysis revealed
that the time of shoot emergence was the decisive factor for FBD in 1-,
2- and 3-month-old shoots. Defoliated shoots put forth terminal
extension or axillary growth, while in undefoliated ones only terminal
growth took place. There is a strong indication that in guava, leaves
play a favourable role in flower bud formation.