INTEGRATED WEED MANAGEMENT IN MENTHOL MINT (Mentha arvensis L.)
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Date
2018-08-29
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K.R.C, COLLEGE OF HORTICULTURE, ARABHAVI (UNIVERSITY OF HORTICULTURAL SCIENCES, BAGALKOT)
Abstract
A Field experiment was conducted during 2017 to study the effect of different
weed management methods on menthol mint in northern dry zone of Karnataka.
The experiment was laid out in randomized block design having three replications
with 12 treatments. The objective of the experiment is to identify the suitable and
economically viable cost effective integrated weed management practices for menthol
mint to increase yield and quality of essential oil.
The weed density, fresh weight of weeds and dry weight of weeds at 30 DAP
were recorded significantly minimum in pre-emergent application of oxyflourfen @
0.25 kg a.i./ha (05.66/m2, 23.33 g/m2 and 7.94 g/m2, respectively) and maximum
were recorded in un-weeded control (90.00/m2, 201.66 g/m2 and 36.85 g/m2,
respectively). Among the different weed management treatments pre-emergent
application of oxyfluorfen 23.5 EC 0.25 kg a.i./ha recorded significantly maximum
fresh herb (17.69 t/ha), shade dried herb (14.63 t/ha), essential oil yield (107.62
kg/ha), net returns (` 83,461.78/ha) and cost: benefit ratio (1: 2.82), respectively,
whereas minimum of these values were recorded in un-weeded control (5.95 t/ha,
4.16 t/ha, 38.99 kg/ha, ` 16,825.78/ha and 1: 1.56).
Among the different weed management practices the pre-emergent application
of oxyfluorfen @ 0.25 kg a.i./ha proved effective in controlling most of the weed
species and recorded significantly higher fresh herbage, dry herbage and essential oil
yield. The oil quality was also not affected due to any of the treatment.
The treatment pre-emergent application of oxyfluorfen @ 0.25 kg a.i./ha
followed by inter-cultivation can be adopted by the farmers as a integrated method of
weed management in menthol mint. The treatment organic mulch with sugarcane
trash @ 5 t/ha recorded significantly reduced weed density, weed biomass and
recorded good herbage and oil yield and this treatment can be adopted by the farmers
as a non-chemical method of weed management in menthol mint.
Description
TH-648
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