Effect of Growth Regulators and Plant Nutrients on Sex Expression, Fruit Set and Yield in Cashew (Anacardium occidentaie L. )
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Date
1989
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY, RAJENDRANAGAR, HYDERABAD.
Abstract
An investIgatlon was under taken durIng 1998-99 at
Cashew Research Station Bapatla, Andhra Pradesh Agricultural
University, to study the affect of different plant growth
regulators and plant nutrients sprayed twice and thrice on
sex expression, fruit set, retention and yield of cashew
cv. Tree No - ;9.
There was s1gnificant reduction in the rat10 of staminate
to perfect flower production with double sprays at
lower concentrat1ons of l,4-0, ethre1 and NAA treatments.
Triple sprays of KNO~ and boron treatments also had eignlficant
effect.
Percentage of fruit set had recorded a s&gn&f&cant
Increase over control by tr1ple sprays of growth regulators
at higher concentrat&ons, and with double sprays of ztnc
and boron each at 0., per cent concentration.
As for fruit retent1on, growth regulator treatments
VIZ., double spray of ethrel, NAA and CCC have showed positive
Influence, while plant nutrients proved to be ineffecttve.
Oays taken from flowering to fruit setttng was minimum
w1th CCC <1000 ppm) and ethrel <100 ppm> double sprays.
while plant nutrients recorded vartable responses. Oays to
fru1t matur1ty from fruit setting was reduced by '00 ppm
CCC treatment while plant nutrients had little stgntftcant
effect.
Pantcle length was m1nimum with CCC sprays and showed
an Increase with ethrel (100 PPM) and molybdenum (0.0Z per
cent> sprays. Mean number of branches par p&n&cle were
highest wtth '' ppm NAA.
width
S&gniftcant
and breadth
d&fferencas tn wetght, volume, length,
of the nuts were nottcad with the dif~
e~ent treatments. However. no ~ixed pattern an the e~~ect
on nut characters was observed.
In respect of pan1cle y1eld athrel 100 ppm and NAA 100
ppm with double sprays ware the most e~ficient.
Correlation studies proved positive aaaoc1ataon between
yield and mean number of pe~fect flowers and number of nuts
per panacle reachang maturaty. Regression analysts andJcated
that the triat number of nuts per pan1cle raach1ng maturaty
had stgntftcant impact on y1ald per pantcle of the
eleven independent tra1ts studtad. Taktng anto constdaration
costs 1ncurred and net returns NAA 100 ppm spray proved
to be profitable over 100 ppm athrel.
Description
Keywords
Effect, Growth, Regulators, Plant, Nutrients, Sex Expression, Fruit Set, Yield, Cashew