Bio-Efficacy of Herbicidal Weed Control on Production Potential of Wheat (Triticum aestivum L.)
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Date
2016
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MPUAT, Udaipur
Abstract
A field experiment was conducted during rabi season of 2014-15 at Instructional Farm (Agronomy), Rajasthan College of Agriculture, Udaipur. The experiment consisted of 10 treatments (2,4-D 0.5 kg ha-1; metsulfuron 4 g ha-1; isoproturon 1.0 kg ha-1; sulfosulfuron 25 g ha-1; 2,4-D 0.25 kg ha-1 + isoproturon 0.75 kg ha-1; 2,4-D 0.25 kg ha-1+ sulfosulfuron 20 g ha-1; metsulfuron 3 g ha-1 + isoproturon 0.75 kg ha-1; metsulfuron 3 g ha-1 + sulfosulfuron 20 g ha-1; weedy check and weed free). The ten treatments were replicated thrice in Random Block Design, wheat variety Raj. 4037 was used as test crop.
All the weed control treatments significantly reduced density as well as dry matter accumulation of both categories of weeds at 60, 90 DAS and at harvest. Amongst various weed control treatments mixtures application of herbicides brought about greater degree of reduction in total weed parameters in comparison to individual herbicides. The data also revealed that maximum weed control efficiency and minimum weed index was achieved under the influence of metsulfuron 3 g ha-1 + sulfosulfuron 20 g ha-1 with respectively values as 91.49, 2.35 per cent, respectively.
The plant height at 60, 90 DAS and at harvest significantly increased through all the weed control treatments over weedy check and the tallest plants were recorded under the influence of weed free (61.17, 96.33 and 104.50 cm, respectively) closely followed by mixtures application of metsulfuron 3 g ha-1 with either isoproturon 0.75 kg ha-1 or sulfosulfuron 20 g ha-1. Similarly, the highest crop dry matter accumulation at 60, 90 DAS and at harvest was recorded under weed free treatment (187.18, 377.69 and 441.58 g m-1 row length) closely followed by metsulfuron 3 g ha-1 + sulfosulfuron 20 g ha-1 (185.93, 374.56 and 437.62 g m-1 row length). However, its results were at par with all other mixtures. The value of yield attributes viz. effective tillers m-1 row length, grain ear-1, 1000 grain weight were significantly higher with
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different weed control treatments with the highest after weed free was metsulfuron 3 g ha-1 + sulfosulfuron 20 g ha-1 (124.33, 46.93 and 47.26, respectively). However, it results was at par with rest treatments under test. Consequently, after weed free (5350 kg ha-1) the highest grain yield was achieved under metsulfuron 3 g ha-1 + sulfosulfuron 20 g ha-1 (5222 kg ha-1), which was found at par with all other mixtures and significantly higher than single applied ones. After weed free (7174 kg ha-1) the highest straw yield (7111 kg ha-1) was also recorded with metsulfuron 3 g ha-1 + sulfosulfuron 20 g ha-1 which was found at par with all other treatments. Further-more, after weed free (12524 kg ha-1), mixture of metsulfuron 3 g ha-1 + sulfosulfuron 20 g ha-1 was followed the next choice with respect to biological yield (12333 kg ha-1) which was significantly higher than rest of the treatments except metsulfuron 3 g ha-1 + isoproturon 0.75 kg ha-1 (11872 kg ha-1).
All the weed control treatments significantly increased nitrogen and phosphorus uptake by wheat grain as well as wheat straw over weedy check. After weed free (595.40 kg ha-1) the maximum protein yield (581.37) was recorded with metsulfuron 3 g ha-1 + sulfosulfuron 20 g ha-1 which was significant higher than all individual herbicides and 2,4-D 0.25 kg ha-1 + sulfosulfuron 20 g ha-1 (481.51 kg ha-1). Both net return of 52603 ha-1 and benefit cost ratio of 2.04 were also obtained under metsulfuron 3 g ha-1 + sulfosulfuron 20 g ha-1 closely followed by all other treatments
Description
Bio-Efficacy of Herbicidal Weed Control on Production Potential of Wheat (Triticum aestivum L.)”
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Citation
Kien and Massey, 2016