Integrated weed management for control of complex weed flora in directseeded upland rice under Southern transition zone of Karnataka

Dhanapal, G. N.; Sanjay, M. T.; Nagarjun, P.; Sandeep, A.

doi:10.5958/0974-8164.2018.00007.2

Cited by 8 publications

(13 citation statements)

References 2 publications

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“…All the weed management treatments produced significantly higher grain yield (p<0.05) over weedy check (Table 4). Dhanapal et al (2018) also observed similar results and reported that it was due to reduced density and biomass of weeds at all the growth stages of crop, which increased dry matter of rice and number of panicles m -2 . Significantly higher grain yield was recorded in weed free treatment in our experiments (Table 4) which was followed by the treatment with Pendimethalin followed by Bispyribac sodium tank mix with Ethoxysulfuron spray during both the years (Table 4).…”

Section: Grain Yield Straw Yield and Harvest Indexsupporting

confidence: 78%

Weed density and productivity of dry direct seeded rice in relation to weed management practices and seedbed preparation methods

Shah

Sah

Basnet

et al. 2020

J. Agric. For. Univ.

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Effective weed management practice is important for successful dry direct seeded rice (DDSR) cultivation. Field experiments were conducted during rainy seasons of 2016 and 2017 to assess the effect of herbicides, or herbicides mixture, and seedbeds preparation methods on weed density and grain yield of DDSR. The experiments were done by using two factors factorial strip plot design with four replications. The treatments consisted of nine weed management practices (weed free; weedy check; spraying Pendimethalin; Bispyribac sodium; Ethoxysulfuron; Pendimethalin followed by Bispyribac sodium; Pendimethalin followed by Ethoxysulfuron; Bispyribac sodium tank mix with Ethoxysulfuron, and Pendimethalin followed by Bispyribac sodium tank mix with Ethoxysulfuron) as horizontal factor whereas two seedbed preparation methods (stale, and normal seedbed) were considered as the vertical factor. The data were collected and analyzed using MSTAT-C statistical software. Total density and dry matter of weeds were significantly (p<0.05) lower in weed free treatment followed by Pendimethalin spray and Bispyribac sodium tank mix with Ethoxysulfuron spray at all the growth stages of rice in both the years. Similarly, rice grain yield was significantly higher (p<0.05) in weed free treatment followed by Pendimethalin spray and Bispyribac sodium tank mix with Ethoxysulfuron spray in both the years. Effect of seedbed preparation methods on weed density and dry matter, yield attributes and yield of rice were non-significant. Therefore, Pendimethalin spray followed by Bispyribac sodium tank mix with Ethoxysulfuron spray seems better option for managing weeds in DDSR.

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Section: Grain Yield Straw Yield and Harvest Indexsupporting

confidence: 78%

Weed density and productivity of dry direct seeded rice in relation to weed management practices and seedbed preparation methods

Shah

Sah

Basnet

et al. 2020

J. Agric. For. Univ.

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“…Higher grain yield was provided by reduced weed density and weed dry matter as a result of effective weed control in all of the weed management treatments compared to the control treatment. Another reason ascertained could be due to all treatments linked with weed management practices were more profitable than control in terms of net monetary returns as recommended earlier by Dhanapal [4]…”

Section: Net Returns ( Ha -1 )mentioning

confidence: 99%

“…Semi dry rice (Dry direct seeded) has various advantages over puddled transplanted rice, including easier planting, timely sowing, less labour, 7-10 days earlier crop maturity, reduced water demand, lower production costs and enhanced profits [3,4].…”

Section: Introductionmentioning

confidence: 99%

Response of Nutrient and Weed Management Practices on Yield and Economics of Semi Dry Rice

Naganjali¹,

Vani²,

Madhavi³

2021

IJECC

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A field experiment was laid out at College Farm, Agricultural College, Aswaraopet, Bhadradri Kothagudem Dist., Professor Jayashankar Telangana State Agricultural University, Telangana State during kharif, 2016 and 2017. Experiment was laid out in split plot design with three treatments under main plots i.e. chemical fertilizer alone, integration of vermicompost and FYM along with inorganic fertilizers and four sub plots as weed management practices with pre and post-emergence herbicides along with hand weedings. Results revealed that highest grain and straw yields, gross and net returns were highest with 75% RDF + 25% N through vermicompost and Bispyribac sodium 10% SC @25 g ha-1 (Pre-Emg.) fb (Pyrazosulfuron ethyl 10 % WP @ 25 g ha-1 + 2, 4-D 80% WP @ 0.5 kg a.i ha-1) + HW @ 50 DAS. However, B-C ratio did not show any significant influence with nutrient treatments while highest B-C ratio was found with Bispyribac sodium 10% SC @25 g ha-1 (Pre-Emg.) fb Hand weeding @ 20, 40 DAS.

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“…Because of this broad spectrum weed control the respective treatments have recorded lower total weed density and biomass [15,16]. Highest weed density and biomass in unweeded control is due to uninterrupted and luxurious growth of weeds assisted by the absence of effective weed management practice [17].…”

Section: Ipomea Albamentioning

confidence: 99%

Impact of Weed Management Practices on the Weed Dynamics, Nutrient Uptake Pattern of Weeds and Direct Seeded Rice

Poojitha¹,

Murthy²,

Sanjay³

et al. 2022

IJPSS

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Herbicide based weed management is the emerging and effective method for controlling the weed flora of direct seeded rice. Weed growth often has an impact on crop development by interfering with plant nutrients. A two-year weed experiment with twelve treatments was set up at the University of Agricultural Sciences in Bangalore, Karnataka, India to know the effect of weed management practices on weed and nutrient dynamics in direct seeded rice. Significantly lower total weed density and biomass was observed with bispyribac sodium 10 SC 40 g a.i. ha-1 as post emergence which recorded statistically at par values with bensulfuron methyl + pretilachlor 6.6 GR 660 g a.i. ha-1 as pre-emergence during both the years of study. The allelochemicals used in the study performed well over unweeded control but it was far less when compared with chemical herbicides. Nutrient uptake by the direct seeded rice (82.17, 31.76 and 68.83 kg ha-1 NPK in 2020 and 89.38, 38.84 and 75.62 ha-1 NPK in 2021, respectively) and grain yield (4.98 t ha-1 in 2020 and 4.99 t ha-1 in 2021, respectively) was also reported to be higher with bispyribac sodium 10 SC 40 g a.i. ha-1 as post emergence which was on par with bensulfuron methyl + pretilachlor 6.6 GR 660 g a.i. ha-1 as pre-emergence. As the nutrient uptake by the crop and weeds are negatively correlated, the same treatments have recorded lower nutrient removal by the weeds. Higher weed biomass and rapid nutrient removal by weeds had resulted in poor soil nutritional status in unweeded control compared to all other treatments. Application of bispyribac sodium 10 SC 40 g a.i. ha-1 as post emergence or bensulfuron methyl + pretilachlor 6.6 GR 660 g a.i. ha-1 as pre-emergence were considered to be best management practices for weed management under direct seeded rice.

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Integrated weed management for control of complex weed flora in directseeded upland rice under Southern transition zone of Karnataka

Cited by 8 publications

References 2 publications

Weed density and productivity of dry direct seeded rice in relation to weed management practices and seedbed preparation methods

Weed density and productivity of dry direct seeded rice in relation to weed management practices and seedbed preparation methods

Response of Nutrient and Weed Management Practices on Yield and Economics of Semi Dry Rice

Impact of Weed Management Practices on the Weed Dynamics, Nutrient Uptake Pattern of Weeds and Direct Seeded Rice

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