The physiology of biennial bearing of mango trees.
Stino G. R., Fayek M. A., Khattab M. M., Bastawrous M. B.
Author Affiliation: Cairo University, Cairo, Egypt.
Annals of Agricultural Science, Moshtohor 16 : 193-207
Abstract : Ethephon at 250 p.p.m. (applied in October) combined with girdling (September) increased flowering in on-year trees of the two mango cvs Langra and Ewaise, whereas TIBA at 50 p.p.m. (October) stimulated flowering in off-year trees. The ability of Langra shoots to produce lateral flushes was lower when non-fruiting panicles were present than when these were removed. Levels of indole compounds and gibberellins increased in the lateral buds of shoots that bore fruits, but the levels of both these components and of phenols fell in the lateral buds of shoots which had been defruited at the pea stage. Indoles and gibberellins arose in the seeds and moved to the lateral buds. Early defruiting at the pea stage enhanced the growth of lateral buds and the number of flushes in both cvs but removing fruits at the half- or fully-grown stages failed to enhance lateral bud activity.