Efficacy of Herbicides on Growth and Yield of Pearl millet [Pennisetum glaucum (L.) R. Br.]
Loading...
Date
2020-11-02
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Agriculture University, Jodhpur
Abstract
A field experiment was conducted at Instructional Farm, College of
Agriculture, Jodhpur during kharif, 2019 to study the “Efficacy of herbicides on
growth and yield of pearl millet [Pennisetum glaucum (L.) R. Br.]”. The experiment
was laid out in randomized block design wherein, thirteen treatments were undertaken
and replicated thrice. The treatments taken in the investigation were T1- Tembotrione
42% SC @ 90 g a.i. ha-1 at 20 DAS, T2- Tembotrione 42% SC @ 100 g a.i. ha-1 at 20
DAS, T3- Tembotrione 42% SC @ 110 g a.i. ha-1 at 20 DAS, T4- Tembotrione 42%
SC @ 120 g a.i. ha-1 at 20 DAS, T5- Tembotrione 42% SC @ 90 g a.i. ha-1 at 25 DAS,
T6- Tembotrione 42% SC @ 100 g a.i. ha-1 at 25 DAS, T7- Tembotrione 42% SC @
110 g a.i. ha-1 at 25 DAS, T8- Tembotrione 42% SC @ 120 g a.i. ha-1 at 25 DAS, T9-
Atrazine 50% WP @ 400 g a.i. ha-1 (PE) fb Tembotrione 42% SC @ 90 g a.i. ha-1 at
25 DAS, T10- Atrazine 50% WP @ 400 g a.i. ha-1 at 20 DAS fb one hand weeding at
35 DAS, T11- Atrazine 50% WP @ 500 g a.i. ha-1 (PE) fb one hand weeding at 30
DAS, T12- Weedy check and T13- Weed free.
Among weed management treatments, atrazine 50% WP @ 400 g a.i. ha-1 (PE)
fb tembotrione 42% SC @ 90 g a.i. ha-1 at 25 DAS showed the lowest weed density
(3.96 m-2) and weed dry weight (1.79 g m-2) at 20 DAS. But lower weed density of
total weeds (broad and narrow leaved) at 40 DAS and at harvest stage were found in
atrazine 50% WP @ 400 g a.i. ha-1 at 20 DAS fb one hand weeding at 35 DAS (2.40
m
-2 & 2.50 m-2). The lowest dry matter at 40 DAS (1.76 g m-2) and harvest stage
(2.56 g m-2) were found in atrazine 50% WP @ 400 g a.i. ha-1 at 20 DAS fb one hand
weeding at 35 DAS and atrazine 50% WP @ 500 g a.i. ha-1 (PE) fb one hand weeding
at 30 DAS over weedy check, respectively. The higher weed control efficiency was recorded by application of pre and post emergence herbicides i.e. atrazine 50% WP @ 400 g a.i. ha-1 (PE) fb tembotrione 42%
SC @ 90 g a.i. ha-1 at 25 DAS (80.94%) at 20 DAS. At 40 DAS atrazine 50% WP @
400 g a.i. ha-1 at 20 DAS fb one hand weeding at 35 DAS was found superior with
weed control efficiency of 96.52% but application of pre-emergence atrazine 50% WP
@ 500 g a.i. ha-1 (PE) fb one hand weeding at 30 DAS showed maximum control
efficiency (95.04%) at harvest stage. The lowest weed index was found with atrazine
50% WP @ 500 g a.i. ha-1 (PE) fb one hand weeding at 30 DAS (7.93%).
The significant taller plant and plant dry matter at all crop growth stages (74.9
cm & 179.6 cm) and (77.7 g m
-2 & 672.1 g m-2) were recorded with the application of
atrazine 50% WP @ 500 g a.i. ha-1 (PE) fb one hand weeding at 30 DAS. The
maximum value of yield attributes viz. effective tillers (2.67 plant-1), test weight (8.29
g), girth (31.43 mm), ear head length (28.53 cm), grain yield (2194 kg ha-1), stover
yield (4527 kg ha-1), and biological yield (6721 kg ha-1)were observed with the
treatment atrazine 50% WP @ 500 g a.i. ha-1 (PE) fb one hand weeding at 30 DAS.
Economic evaluation of treatment weed free fetched highest gross return
(` 81681 ha-1) and net return (` 56933 ha-1) followed by atrazine 50% WP @ 500 g
a.i. ha-1 (PE) fb one hand weeding at 30 DAS fetched highest gross return (` 75573
ha-1) and net return (` 54620 ha-1) however, atrazine 50% WP @ 400 g a.i. ha-1 (PE)
fb tembotrione 42% SC @ 90 g a.i. ha-1 at 25 DAS depicted higher profitability level
in respect of B: C ratio (3.75). Weed free was obtained maximum profitability (` 686
day-1) followed by atrazine 50% WP @ 500 g a.i. ha-1 (PE) fb one hand weeding at 30
DAS (` 658 day-1) and atrazine 50% WP @ 400 g a.i. ha-1 (PE) fb tembotrione 42%
SC @ 90 g a.i. ha-1 at 25 DAS (` 647 day-1).
Description
Keywords
Citation
Kumar Surendra 2020. Efficacy of Herbicides on Growth and Yield of Pearl millet [Pennisetum glaucum (L.) R. Br.] M.Sc. thesis, College of Agriculture, Agriculture University Jodhpur