In 2001! 2002 and 20022003 seasons. mature Alphonse mango tree
received 4 foliar sprays at monthly intervals from mid Oct, to mid Jan. The tested
treatments were 1 Cont. ( water), 6&4 (alone) at 10 ppm, Gk; ( alone) at 20 ppm .
Pacloputrazol (PBZ) (alone) at 500 ppm . PBZ (atone) at 1000 ppm. urea (alone) at
1%. GA; 10 ppm + urea 1%. GA; 20 ppm + urea 1% . P82 500 ppm + urea 1% and
P132 1000 ppm + urea 1 %.
(3A3 at both tested concentrations. with i or without urea . tended to delay
panicle emergence . flowering and fruit set. increased number of perfect flowers!
panicle and panicle length. Worthwhile. the same treatments tended to increase the
number of healthy panicles and total number of panicles f tree. while obviously
depressed number of malformed panicles i tree and malformation percentage.
On the other hand. treatments implying PBZ at both tested concentrations,
(500 a 1000 ppm) . with I or without urea , tended to advance panicle emergence ,
flowering and fruit-set. The same treatments increased number of panicles i tree but
also increased number of malformed panicles! tree and malformation %. Also.
treatments implying PBZ , particularly at the higher concentration (1000 ppm) greatly
increased number of male flowers and total number of flowers;' panicle and promoted
the sex ratio ( male : perfect flowers),
The malformed panicles revealed higher contents of total phenols and total
free amino acids as well as endogenous IAA and ASA as compared with healthy
ones. On the other hand, the malformed panicles exhibited lower total indoles and
endogenous GA as compared with healthy ones.