Effect of Plant Density and Herbicidal Control on the Productivity of Clusterbean [Cyamopsis tetragonoloba (L.) Taub.]
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Date
2005-06-25
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MPUT, UDAIPUR
Abstract
A field experiment entitled "Effect of plant density and herbicidal control on the
productivity of clusterbean [Cyamupsis tetragonoloba (L.) Taub.j" was conducted on cla>
loam soils, at Instructional Farm, Rajasthan College of Agriculture, Udaipur during khahf
season of the year 2004. The objectives were to find out the optimum plant densit> and
suitable herbicide for clusterbean.
The experiment consisted of 21 treatment combinations comprising three plant
densities (2.22, 3.33 and 4.44 lac plants ha') and seven weed control treatments (unweeded
control, hand hoeing (25 DAS), fluchioralin (PPI) f?/; 0.75 kg a.i. ha', pendimethalin (PE) ci
0.75 kg a.i. ha"', metolachlor (PE) '7i] 1.0 kg a.i. ha', alachlor (PE) '«] 2 kg a.i. ha' and weed
free check). These were evaluated under factorial RBD with three replications, allocating all
the treatment combinations randomly in different replications.
The results revealed that crop sown under plant density of 3.33 lac plants ha'
significantly improved growth parameters and >ield attributes with concomitant increase in
seed, haulm and biological yield b\' 22.64 and 9.02. 18 and 8.57 and 19,30 and 8 7 per cent,
respectively over plant densities of 2.22 lac ha"' and 4.44 lac ha"'. Maximum net returns
(Rs. 20983 ha"') and highest B.C ratio (2.80) was obtained with plant density of 3.33 lac ha"'.
Weed control methods markedly reduced crop weed competition. Amongst methods,
hand hoeing, fluchioralin and pendimethalin effectively reduced density and dr\- matter of
weeds and recorded increased protein and gum content compared to unweeded control The
reduced crop weed competition under hand hoeing, fluchioralin and pendimethalin tended to
improve various growth parameters, \ield components and yield. Hand hoeing recorded
higher seed, haulm and biological >ield which was higher b>' 56.48, 50.84 and 52.10 per cent
over unweeded control, respectively. The corresponding increase with fluchioralin and
pendimethalin were to the order of 55.36, 48.34, 50.28 and 51.24, 44.65, 46.48 per cent.
respectively over unweeded control.
* PG Scholar, Deptt. of Agronomy, RCA, Udaipur.
** Asst. Prof, Deptt. of Agronomy. RCA, Udaipur.
The economic evaluation showed that the hand hoeing, fluchloralin and
pendimethahn treatments were equally beneficial and these recorded significantly higher net
returns (Rs. 20,553, Rs. 20,974 and Rs. 19.9)8 ha"') and B.C ratio (2.65, 2,90 and 2 70)
compared to unweeded control (Rs. 11,952 ha"' and 1.92 B.C ratio).
The combined economic evaluation of studied factor revealed the crop sown at plant
density of 3.33 lac ha"' and weed control b\ fluchloralin proved most optimum. The combined
use of these factors realized 19.19 q ha' seed. 49.44. q ha"' haulm and net returns of
Rs. 23861 ha"' with B.C ratio of 3.37.
Description
Effect of Plant Density and Herbicidal Control on the Productivity of Clusterbean
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JastEffect of Plant Density and Herbicidal Control on the Productivity of Clusterbean \Cyamopsis tetragonoloba (L.) Taub