Comparative performance of different mechanized weed control operations in pearl millet (Pennisetum glaucum L.)
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Date
2018
Authors
Pandey, Shesh Nath
Journal Title
Journal ISSN
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Publisher
CCSHAU
Abstract
A field experiment entitled “Comparative performance of different mechanized weed control
operations in pearl millet (Pennisetum glaucum L.)” was conducted at Regional Research Station,
Bawal, Rewari of CCS Haryana Agricultural University during kharif 2017. The experiment was
conducted in randomized block design with three replications and 12 treatments. Major weed species
infesting the experimental field consisted of Cyperus rotundus (42%), Trianthema partulacastrum
(26%) and Digera arvensis (17%) at 20 days after sowing. Among various weed control treatments,
recommended manual weed control techniques for pearl millet i.e., T1 (sowing at 45 cm row spacing
and interculture with kasola at 22 and 33 DAS) and T2 (sowing at 45 cm row spacing and interculture
with wheel hand hoe at 22 and 33 DAS) recorded the lower weed density (No m-2) and dry matter (g m-
2) compared to mechanized interculture operation i.e., T7 (sowing at 60 cm row spacing and interculture
with tractor drawn cultivator at 17 and 27 DAS), T8 (sowing at 60 cm row spacing and interculture with
power weeder at 17 and 27 DAS) and other treatments under study except both weed free treatments
(T10 with 45 cm row spacing and T12 with 60 cm row spacing). Weed control efficiency was higher at
40 DAS and maturity under T1 (92.5 and 89.1%) and T2 (89.9 and 85.8%) over T8 (88.2 and 84.6%)
and T7 (86.4 and 82.8%), respectively, except both weed free treatments (T10 and T12). Whereas, growth
parameters viz. plant height (cm) and leaf area index values at 40, 60 DAS and maturity were better in
T1 and T2 than T7, T8 and other treatments except both weed free treatments. However T1 and T2
exhibited the lower dry matter accumulation (g plant-1) than T7, T8 and other treatments except both
weedy check (T9 and T11) at 40, 60 DAS and maturity. Treatment T7 and T8 recorded better yield
attributes namely number of effective tillers per plant, test weight (g) and ear head girth (cm) over T1,
T2 and other treatments except T12, and reverse trend was observed with respect to ear head length
(cm). However, grain yield (q ha-1) was slightly better under T1 and T2 over T7 and T8 which was
higher by margin of 4.5 and 3.8%; and 1.2 and 0.5%, respectively and these treatments were
statistically at par. Although, in economic term T7 recorded the maximum net monetary returns (Rs
23778 ha-1) and B:C ratio (1.80) over other treatments and fetched an additional net monetary returns
of Rs 1155 ha-1 over T8.
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