Weed germinable seedbanks of rice–wheat systems in the Eastern Indo‐Gangetic Plains: Do tillage and edaphic factors explain community variation?

Lowry, Carolyn J.; Brainard, Daniel C.; Kumar, Virender; Smith, Richard G.; Singh, Mukesh Kumar; Kumar, Pankaj; Kumar, Ajay; Kumar, Vipin; Joon, R. K.; Jat, Rajkumar; Poonia, Shishpal; Malik, R. K.; McDonald, Andrew J.

doi:10.1111/wre.12505

Cited by 3 publications

(2 citation statements)

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“…ZTW after DSR system resulted in a significant reduction in emergence of C. album compared to SWI after SRI production system. A lower density of C. album in ZT wheat ( Lowry et al, 2021 ), and higher in CT system have also been reported ( Swanton et al, 1999 , Shrestha et al, 2002 , Mishra et al, 2019b ). Seeds of many weed species including C. album require brief exposure to light to break seed dormancy and induce germination ( Buhler, 1997 ).…”

Section: Discussionmentioning

confidence: 62%

Tillage and crop establishment effects on weeds and productivity of a rice-wheat-mungbean rotation

Mishra

Kumar

Mondal

et al. 2022

Field Crops Research

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Section: Discussionmentioning

confidence: 62%

Tillage and crop establishment effects on weeds and productivity of a rice-wheat-mungbean rotation

Mishra

Kumar

Mondal

et al. 2022

Field Crops Research

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“…It is possible that the reduced emergence of these species under CT is related to placement of seed in a deeper layer (>5 cm) due to ploughing. Nandan et al (2020) and Lowry et al (2021) found a higher relative density of broadleaved weeds [ Solanum nigrum (L.) and Physalis minima (L.)] in ZT.…”

Section: Discussionmentioning

confidence: 98%

Weed seedbank as influenced by tillage and herbicide in direct seeded rice‐mustard cropping sequence in lateritic soil of eastern India

Jaiswal,

Duary,

Kumar

et al. 2024

Weed Research

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The above‐ground community dynamics of weeds represent the soil weed seedbank in an agro‐ecosystem. Hence, understanding the seedbank will offer an idea for future weed management tactics. We aimed to determine the density of weed seedbank and emergence of major weeds in direct seeded rice (DSR) (Oryza sativa L.)—mustard (Brassica campestris L. var. yellow sarson) cropping sequence under varied tillage and herbicide combinations. The present study on weed seedbank was conducted using seedling emergence method after collecting the soils at the harvest of mustard at the completion of 2 years field experimentation. The experiment was conducted in split‐plot design with two tillage practices [zero tillage (ZT) and conventional tillage (CT)] in main plot and eight weed management practices in DSR [oxadiargyl followed by (fb) bispyribac‐sodium, penoxsulam + cyhalofop‐butyl, oxadiargyl fb penoxsulam + cyhalofop‐butyl, fenoxaprop‐p‐ethyl + ethoxysulfuron, oxadiargyl fb fenoxaprop‐p‐ethyl + ethoxysulfuron, pendimethalin fb bispyribac‐sodium, unweeded control, and weed free check] as subplot. The carry‐over effect of tillage and weed management practices were recorded in mustard crop. Seed emergence study revealed that ZT reduced the emergence of grassy weeds (by 13.7%) and total weed emergence (19.5%) in comparison to the CT (p < 0.05). However, emergence of broadleaf weeds was 24.5% higher in ZT than in CT. The higher infestation was recorded for Ludwigia parviflora (Jacq.) Raven under penoxsulam + cyhalofop‐butyl, fenoxaprop‐p‐ethyl + ethoxysulfuron, Cyperus iria (L.) under fenoxaprop‐p‐ethyl + ethoxysulfuron, and Eleusine indica (L.) Gaertn. under pendimethalin fb bispyribac‐sodium, oxadiargyl fb bispyribac‐sodium. Sole application of post‐emergence (POE) herbicide decreased the total weed emergence by 22.2%–28.1% than unweeded control (p < 0.05). Whereas, sequential application of PRE + POE herbicides decreased the total weed emergence by 32.8%–36.9% than unweeded control (p < 0.05). Notably, sedge weeds such as Cyperus iria (L.) and Fimbristylis miliacea (L.) Vahl were lower in ZT than in CT under herbicide treated plots (by 66.6%–84.3%) than unweeded control. Thus, ZT with oxadiargyl 90 g a.i. ha−1 fb fenoxaprop‐p‐ethyl + ethoxysulfuron (90 + 15 g a.i. ha−1) as tank‐mix can be effectively used to lower the weed seedbank density vis‐à‐vis managing complex weed flora in DSR and rice‐mustard cropping sequence.

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