STUDIES ON CHEMICAL WEED MANAGEMENT IN TRANSPLANTED TURMERIC (Curcuma longa L.)
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Date
2018-08-18
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K.R.C, COLLEGE OF HORTICULTURE, ARABHAVI (UNIVERSITY OF HORTICULTURAL SCIENCES, BAGALKOT)
Abstract
The experiment was conducted at KRCCH, Arabhavi in 2017-18 to study the
effect of different weed management methods on growth, yield and quality of
transplanted turmeric (Cv. Sale m). The experiment was laid out with 13 treatments
(hand weeding at 15 days interval upto 3 months, Pre-emergent application of
Alachlor 50% EC @ 1 and 1.5 kg a.i ha-1, Atrazine 50% WP @ 1 and 1.5 kg a.i ha-1,
Metribuzin 70% WP @ 0.7 and 1.05 kg a.i ha-1, Oxyfluorfen 23.5% EC @ 0.2 and 0.3
kg a.i ha-1 and Pendimethalin 30% EC @ 1 and 1.5 kg a.i ha-1, 30 μ silver black
polythene mulch and unweeded control) according to randomized block design and
replicated thrice.
The weed density and dry weights were lowest in polythene mulching
(3.33 m-2 and 2.67 g m-2, respectively) at 30 DAT, while, the highest was found in
unweeded control (35.33 m-2 and 62 g m-2, respectively). Among the herbicides,
application of Metribuzin 70% WP @ 1.05 kg a.i. ha-1 recorded significantly lower
weed biomass (8.00 m-2 and 9.33 g m-2, respectively).
The polythene mulching recorded highest values for growth attributes like
average plant height (52.40 cm), plant spread (32.27 cm), number of tillers per plant
(2.20), number of leaves (8.40), length of recently matured leaf (34.00 cm) and its
area (233.67 cm2) at 180 DAT and resulted in the highest yield (11.67 t ha-1), net
returns (` 1,21,019) and benefit: cost ratio (2.10). While, the same parameters were
the lowest in unweeded control (38.53cm, 26.03cm, 1.13, 6.33, 22.4 cm, 110.7 cm2,
2.10 t ha-1, ` 57,963 and 0.42, respectively). Among the herbicides, application of
Oxyflourfen 23.5% EC @ 0.3 kg a.i. ha-1 recorded higher values (50.93 cm, 31.90 cm,
1.80, 8.13, 33.00 cm, 222.86 cm2, 7.44 t ha-1, ` 45,489 and 1.43, respectively).
Whereas, Metribuzin 70% WP @ 1.05 kg a.i. ha-1 recorded lower values for these
parameters (41.07 cm, 26.23 cm, 1.27, 6.40, 20.33 cm, 116.82 cm2, 2.36 t ha-1,
` 55,987 and 0.46, respectively) and found to be toxic to the transplanted turmeric.
Description
TH-639
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