Weed management practices in upland direct seeded jhum rice under the Eastern Himalayas

Kumar, Rakesh; Chatterjee, Dibyendu; Deka, Bidyut C.; Kumar, Manoj; Kuotsu, Rukuosietuo; Ao, Merasenla; Ngachan, S. V.

doi:10.5958/2348-7542.2016.00035.8

Cited by 10 publications

(3 citation statements)

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“…The analysis of data (2 years' average as year × treatment interaction is non-significant) were performed for yield, yield attributes, productivity, economics and nutrient uptake. Before that, Levene's Test for homogeneity of variances was done (Kumar et al ., 2016). In all the cases, ‘ P -value’ greater than 0.05 indicated that the variability in the two years of studies were not significantly different.…”

Section: Methodsmentioning

confidence: 99%

Weed management in a direct-seeded rice-ratoon rice cropping system

et al. 2022

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A field study was conducted to evaluate the effect of weed management practices in the main crop on growth, yield and economics of rice- ratoon rice cropping system in two consecutive years i.e., 2014–15 and 2015–16. The result showed that Cyperus difformis was the most dominant weed in the main rice crop, whereas Ludwigia adscendes was the dominant weed in ratoon rice. In weed-free plots, the main crop recorded the highest productivity of 47.52 kg/ha/day, whereas the ratoon crop registered productivity of 37.70 kg/ha/day which was the 79.3% of the main crop productivity. In the weedy plot, crop-weed competition caused 28.8 and 37.5% reduction in energy use efficiency and energy productivity of the rice-ratoon rice cropping system respectively. Yield reduction of 37.3 and 43.6% in the main crop and ratoon crop respectively recorded due to weed infestation in weedy check. All the weed control practices registered an increase in system productivity, nutrient uptake and energy use efficiency. Among the herbicidal treatments, application of bensulfuron-methyl + pretilachlor (60 + 600 g/ha) at 10 DAS to the main crop registered a higher net return of USD$ 639.2 and 260.1 of main crop and ratoon crop, respectively. Hence it can be recommended for weed management in rice-ratoon rice cropping system.

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Section: Methodsmentioning

confidence: 99%

Weed management in a direct-seeded rice-ratoon rice cropping system

et al. 2022

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“…Weeds is the limitation factor in rice production under DSR system, it compete versus rice plants on water absorption, sun light for photosynthesis, place in the field (Kumar et al 2016) which reduce rice tillering ability and deplete macro and micro elements from the soil, moreover is main host for insects and pathogens which attack rice plants along growing season. Grassy weeds is the dominant weeds in DSR, such aerobic conditions enhance seeds of grasses to rapidly germinate and grow and become more stronger as C 4 photosynthetic grass than rice, in addition to appearing grassy weeds in successive generations during growing season of rice.…”

Section: Introductionmentioning

confidence: 99%

Chemical Control of Grassy Weeds in Drill-Seeded Rice (Oryza Sativa L.)

El-Naby

El-Ghandor²

2022

Menoufia Journal of Plant Production

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Weeds are the main obstruction under drill-seeded rice system so that two field experiments were conducted at the experimental farm of Rice Research & Training Center, Sakha Agricultural Research Station, Kafrelsheikh, Egypt in the summer seasons of 2020 and 2021 to reset the best chemical control program against grassy weeds in drill-seeded rice (Giza 179 cv.). Randomized Complete Block Design (RCBD) with three replications was used during both seasons of study. Ten chemical weed control were applied; (1) pendimethalin 50% EC (2.023 kg ai ha -1 ) at 4 DAS as preemergence herbicide, (2) pendimethalin as per-emergence followed by (fb) penoxsulam 2.5% OD (0.0238 kg ai ha -1 ) at 15 DAS as post-emergence herbicide, (3) pendimethalin as per-emergence fb bispyribacsodium 2% SL (0.0381 kg ai ha -1 ) at 25 DAS, (4) pendimethalin as pre-emergence fb ready mix of cyhalofop-butyl 7% + quinclorac 10% OD (0.238+0.1667 Kg ai ha -1 ) at 20 DAS, (5) pendimethalin as pre-emergence fb fenoxaprop-ethyl 7.5% EW (0.0625 kg ai ha -1 ) at 40 DAS, (6) thiobencarb 50% EC (3.57 kg ai ha -1 ) at 4 DAS as pre-emergence herbicide fb bispyribac-sodium, (7) penoxsulam fb bispyribac-sodium, (8) penoxsulam at 15 DAS fb ready mix of cyhalofop-butyl 7% + quinclorac 10% OD at 25 DAS, (9) penoxsulam at 15 DAS fb fenoxaprop-ethyl and (10) tank mix of penoxsulam (0.0119 kg ai ha -1 ) + fenoxaprop-ethyl (0.0357 kg ai ha -1 ) at 35 DAS as compared to un-treated plots (weedy check) and weed free. The obtained results showed that, sequential application of pendimethalin 50% at 4 DAS pre-emergence herbicide followed by fenoxaprop-ethyl 7.5% at 40 DAS or ready mix of cyhalofop-butyl 7%+quinclorac 10% at 20 DAS recorded the lowest density and biomass of grasses and highest weed control efficiency, highest rice vegetative growth, grain yield and its attributes and reduced yield losses to 3.2 and 3.9%, respectively as compared to weed free during both studing seasons. Based on the obtained data, it could be concluded that sequential application of pre-emergence fb post-emergence herbicides was the best in grassy weed management and improved rice grain yield (87.1% and 9.203 t ha -1 ), while sequential application of early post-emergence fb late post-emergence herbicides ranked second (83.2% and 8.011 t ha -1 ) and exceeded single application of pre-emergence herbicide (40.3% and 4.317 t ha -1 ) and post-emergence herbicide tank mix (72.6% and 7.351 t ha -1 ) under dill-seeded rice conditions.

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“…This technique also reduces the total labour requirement by 11-66% compared to puddled transplanted rice depending on season, location, and type of cultivation method (Kumar et al 2009). Farmers have great enthusiasm towards direct seeded rice because of labour shortage and water scarcity favours the adoption of direct seeding technology in replacement of traditional labour intensive transplanting (Azami and Baki 2007, Prakash et al 2014, Kumar et al 2015a, Kumar et al 2016a, b, Singh et al 2017. Kumar and Ladha (2011) reported the benefits of direct seeding as it improves the soil health, emits less methane and often ensure higher profit in area with assured irrigation supply.…”

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confidence: 99%

Impact of crop establishment methods on rice insect pests incidence in Indo Gangetic Plain (IGP)

et al. 2019

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Rice (Oryza sativa L.), is the staple food for more than half of the world population and an important target to secure food security and livelihoods for millions. The production of rice to mitigate the consumption requirement needs huge amount of water. Direct seeded rice (DSR) technique is becoming popular nowadays because of its lowinput demands and potential to maximize the water productivity under deficit soil moisture. Rice variety, Pusa 1121 is important variety in major rice growing areas of Indo Gangetic Plain that occupies more than 70% area. The population of planthoppers and stem borers were significantly higher and appeared early in direct seeding crop as compared with transplanted rice (TPR). The mean seasonal incidence of stem borers in 2014 were 9.58 and 5.29% in direct seeding whereas in 2015 it was 9.36 and 4.97%. The damage (white ears) was observed maximum on 42nd week in October. The result revealed that incidence of leaffolder was significantly higher in direct seeding than transplanting. The population/ incidence of pests showed positively significant correlation with biotic factors during the study. The grain yield in transplanting crop was also significantly higher than direct seeding. So, management practices in direct seeding should be practiced earlier as compared to transplanted rice to maximize yield by reducing pest population pressure for sustainable agriculture and to conserve natural resources.

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Weed management practices in upland direct seeded jhum rice under the Eastern Himalayas

Cited by 10 publications

References 0 publications

Weed management in a direct-seeded rice-ratoon rice cropping system

Weed management in a direct-seeded rice-ratoon rice cropping system

Chemical Control of Grassy Weeds in Drill-Seeded Rice (Oryza Sativa L.)

Impact of crop establishment methods on rice insect pests incidence in Indo Gangetic Plain (IGP)

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