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STUDIES ON EFFICACY OF PRE-MIX PENOXSULAM + PENDIMETHALIN ON WEED GROWTH, YIELD AND ECONOMICS OF DIRECT SEEDED RICE

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Title STUDIES ON EFFICACY OF PRE-MIX PENOXSULAM + PENDIMETHALIN ON WEED GROWTH, YIELD AND ECONOMICS OF DIRECT SEEDED RICE
 
Creator Uraon, Manisha
 
Contributor Shrivastava, G.K.
 
Subject ##Unable to generate tags textile calculation simplified by john h strong.pdf
pre-mix herbicide, direct seeded rice
 
Description The present investigation entitled “Studies on efficacy of pre- mix penoxsulam + pendimethalin on weed growth, yield and economics of direct seededrice” was carried out at Instructional cum Research Farm, Indira Gandhi Krishi Vishwavidyalaya, Raipur during kharif season of 2015. The soil of experimental field was sandy loam in texture (Inceptisols), neutral in pH and has 0.44 % organic carbon, low nitrogen, medium phosphorus and high potassium content. Experiment was laid out in Randomized Block Design (RBD) with three replications. The treatments consisted of fourteen different weed management treatments viz, T₁Penoxsulam + Pendimethalin (10+240 g/l) SE @ 20 + 480 g a.i. ha⁻¹, T₂Penoxsulam + Pendimethalin (10+240 g/l) SE @ 22.5 + 540 g a.i. ha⁻¹, T₃Penoxsulam + Pendimethalin (10+240 g/l) SE @ 25 + 600 g a.i. ha⁻¹, T₄Penoxsulam + Pendimethalin (10+240 g/l) SE @ 50 + 1200 g a.i. ha⁻¹, T₅Penoxsulam + Pendimethalin (10+240 g/l) SE @ 100 + 2400 g a.i. ha⁻¹, T₆Penoxsulam 24% SC 20 g a.i. ha⁻¹, T₇Penoxsulam 24% SC @ 22.5 g a.i. ha⁻¹, T₈ Penoxsulam 24% SC @ 25 g a.i. ha⁻¹, T₉Pendimethalin 30% EC @ 540 g a.i. ha⁻¹, T10Pendimethalin 30% EC @ 600 g a.i. ha⁻¹, T₁₁Pendimethalin 30% EC @ 1000 g a.i. ha⁻¹, T₁₂Pendimethalin 30% EC @ 1500 g a.i. ha⁻¹, T₁₃hand weeding at 20 and 35 DAS and T₁₄ untreated check. The rice variety MTU-1010 was tested under different combinations of herbicide and maintining the recommended nutrient (N:P:K) doses of 100:50:30 kg ha-1. Rice seed was direct seeded on June 27th, 2015 with a spacing of 20 x 10 cm and harvesting was done on October 21th, 2015.
The result of experiments indicated that the treatment Penoxsulam + Pendimethalin (10+240 g/l) SE @ 100 + 2400 g a.i. ha⁻¹ (T₅) registered maximum growth characters of rice like plant height, dry matter, number of tillers, leaf area, leaf area index, CGR and yield attributing characters like effective tillers m⁻², number of total and filled grains panicle⁻¹, panicle weight and panicle length. It was followed by treatments Penoxsulam + Pendimethalin (10+240 g/l) SE @ 50 + 1200 g a.i. ha⁻¹ (T₄) and hand weeding at 20 and 35 DAS (T₁₃). Regarding grain and straw yield and harvest index, treatment Penoxsulam + Pendimethalin (10+240 g/l) SE @ 100 + 2400 g a.i. ha⁻¹ (T₅) registered significantly higher values as compared to others, but it was at par to treatment Penoxsulam + Pendimethalin (10+240 g/l) SE @ 22.5 + 540 g a.i. ha⁻¹ (T₂), Penoxsulam + Pendimethalin (10+240 g/l) SE @ 25 + 600 g a.i. ha⁻¹ (T₃), Penoxsulam + Pendimethalin (10+240 g/l) SE @ 50 + 1200 g a.i. ha⁻¹ (T₄), Penoxsulam 24% SC @ 22.5 g a.i. ha⁻¹(T₇), Penoxsulam 24% SC @ 25 g a.i. ha⁻¹(T₈) and hand weeding at 20 and 35 DAS (T₁₃).Weed density and weed dry weight of different species and their total were recorded lowest, whereas weed control efficiency was maximum under treatment Penoxsulam + Pendimethalin (10+240 g/l) SE @ 100 + 2400 g a.i. ha⁻¹ (T₅) followed by Penoxsulam + Pendimethalin (10+240 g/l) SE @ 50 + 1200 g a.i. ha⁻¹ (T₄) and hand weeding at 20 and 35 DAS (T₁₃).
The energy use efficiency and energy output : input ratio were recorded highest under treatment Penoxsulam + Pendimethalin (10+240 g/l) SE @ 50 + 1200 g a.i. ha⁻¹ (T₄) followed by treatment Penoxsulam 24% SC @ 25 g a.i. ha⁻¹(T₈). However, the energy input, energy output and net energy output were highest under treatment Penoxsulam + Pendimethalin (10+240 g/l) SE @ 100 + 2400 g a.i. ha⁻¹ (T₅) followed by Penoxsulam + Pendimethalin (10+240 g/l) SE @ 50 + 1200 g a.i. ha⁻¹ (T₄). As regards to net return, it was maximum under treatment Penoxsulam + Pendimethalin (10+240 g/l) SE @ 50 + 1200 g a.i. ha⁻¹ (T₄) followed by treatment Penoxsulam + Pendimethalin (10+240 g/l) SE @ 100 + 2400 g a.i. ha⁻¹ (T₅), whereas the B: C ratio was noted maximum under treatment Penoxsulam 24% SC @ 25 g a.i. ha⁻¹(T₈) followed by treatment Penoxsulam + Pendimethalin (10+240 g/l) SE @ 50 + 1200 g a.i. ha⁻¹ (T₄) and Penoxsulam + Pendimethalin (10+240 g/l) SE @ 100 + 2400 g a.i. ha⁻¹ (T₅).
 
Date 2016-08-01T12:22:42Z
2016-08-01T12:22:42Z
2016
 
Type Thesis
 
Identifier 129p.
http://krishikosh.egranth.ac.in/handle/1/70385
 
Language en
 
Format application/pdf
 
Publisher Indirra Gandhi Krishi Vishwavidyalaya Raipur