Materials and Methods
A field experiment was conducted at Experimental Farm, Department of Horticulture,
S.K.N College of Agriculture, Jobner during rabi
season, 2008-09 to study the response of different
levels of PGR with their single and double sprays
on growth and flowering in African marigold cv. Pusa
Narangi Gainda. The total number of treatments tried
was 17 comprising four levels of GA3 and NAA
namely 50, 100, 150 and 200 ppm and one control
with their single and double sprays. The experiments
were laid out in RBD with three replications having
plot size of 3.0 x 2.25 sq. m. Thirty days old seedlings
were transplanted at 60 x 45 cm apart. The first foliar
spray of GA3 and NAA was done at 30 DAT and
second spray was done at 45 DAT. In physiological
parameters, Leaf area was measured directly with
the help of Li-3100 Areameter. Chlorophyll was
determined by using the method of Arnon (1949).
The observations on different growth and flower
yield were recorded time to time in each treatment
and data were analyzed statistically.