Survey of Weed Management Practices in Direct-Seeded Rice in North-West Cambodia

Two-hundred rice farming households from eight lowland rice villages in North-West Cambodia were surveyed in 2020 to determine changes in farmers’ knowledge, weed management practices and weed seed contamination in seed kept for sowing. The major yield constraints cited by farmers were lack of water...
Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Robert Martin [verfasserIn] Sokunroth Chhun [verfasserIn] Sophea Yous [verfasserIn] Ratha Rien [verfasserIn] Chariya Korn [verfasserIn] Pao Srean [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2021

Schlagwörter:	direct-seeded rice weed management weed population shifts selective herbicides integrated weed management agricultural mechanisation

Übergeordnetes Werk:	In: Agronomy - MDPI AG, 2012, 11(2021), 3, p 498
Übergeordnetes Werk:	volume:11 ; year:2021 ; number:3, p 498

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.3390/agronomy11030498

Katalog-ID:	DOAJ05760858X

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allfieldsGer	10.3390/agronomy11030498 doi (DE-627)DOAJ05760858X (DE-599)DOAJ91d9499a12434451a0c7038ec0ef9ced DE-627 ger DE-627 rakwb eng Robert Martin verfasserin aut Survey of Weed Management Practices in Direct-Seeded Rice in North-West Cambodia 2021 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Two-hundred rice farming households from eight lowland rice villages in North-West Cambodia were surveyed in 2020 to determine changes in farmers’ knowledge, weed management practices and weed seed contamination in seed kept for sowing. The major yield constraints cited by farmers were lack of water, inability to manage water and competition by weeds. Water shortages result in reduced crop establishment, non-optimal herbicide application timing and poor weed control. Reduced tillage, drill planting and use of pre-emergence herbicides can improve weed management. The adoption of drill planting improves crop establishment and enables the use of pre-emergence herbicides. Possible reasons for changes in weed problems include the change to a two-crop rice system in the wet season and spread of seeds by harvesting machines. The main weed seed contaminants of rice seed kept for sowing were <i<Echinochloa crus-galli</i<, <i<E. colona</i<, <i<Fimbristylis miliacea</i<, <i<Ischaemum rugosum</i< and <i<Melochia corchorifolia. F. miliacea</i< was the only species effectively removed by village cleaning methods. Although prevalent in rice fields, <i<Cyperus. iria</i< with <0.2 seeds per 500 g and <i<Leptochloa chinensis</i< with nil contamination were insignificant contaminants of seed samples. The majority of farmers in the study area are relying on repeated use of a narrow range of post-emergence herbicides, thus leading to increased severity of weed problems in dry direct-seeded rice. Integrated weed management is required to reduce over-reliance on post-emergence herbicides. This will require engagement with the local input supply network to introduce advice on improved weed management and sustainable herbicide use. direct-seeded rice weed management weed population shifts selective herbicides integrated weed management agricultural mechanisation Agriculture S Sokunroth Chhun verfasserin aut Sophea Yous verfasserin aut Ratha Rien verfasserin aut Chariya Korn verfasserin aut Pao Srean verfasserin aut In Agronomy MDPI AG, 2012 11(2021), 3, p 498 (DE-627)658000543 (DE-600)2607043-1 20734395 nnns volume:11 year:2021 number:3, p 498 https://doi.org/10.3390/agronomy11030498 kostenfrei https://doaj.org/article/91d9499a12434451a0c7038ec0ef9ced kostenfrei https://www.mdpi.com/2073-4395/11/3/498 kostenfrei https://doaj.org/toc/2073-4395 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 11 2021 3, p 498
allfieldsSound	10.3390/agronomy11030498 doi (DE-627)DOAJ05760858X (DE-599)DOAJ91d9499a12434451a0c7038ec0ef9ced DE-627 ger DE-627 rakwb eng Robert Martin verfasserin aut Survey of Weed Management Practices in Direct-Seeded Rice in North-West Cambodia 2021 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Two-hundred rice farming households from eight lowland rice villages in North-West Cambodia were surveyed in 2020 to determine changes in farmers’ knowledge, weed management practices and weed seed contamination in seed kept for sowing. The major yield constraints cited by farmers were lack of water, inability to manage water and competition by weeds. Water shortages result in reduced crop establishment, non-optimal herbicide application timing and poor weed control. Reduced tillage, drill planting and use of pre-emergence herbicides can improve weed management. The adoption of drill planting improves crop establishment and enables the use of pre-emergence herbicides. Possible reasons for changes in weed problems include the change to a two-crop rice system in the wet season and spread of seeds by harvesting machines. The main weed seed contaminants of rice seed kept for sowing were <i<Echinochloa crus-galli</i<, <i<E. colona</i<, <i<Fimbristylis miliacea</i<, <i<Ischaemum rugosum</i< and <i<Melochia corchorifolia. F. miliacea</i< was the only species effectively removed by village cleaning methods. Although prevalent in rice fields, <i<Cyperus. iria</i< with <0.2 seeds per 500 g and <i<Leptochloa chinensis</i< with nil contamination were insignificant contaminants of seed samples. The majority of farmers in the study area are relying on repeated use of a narrow range of post-emergence herbicides, thus leading to increased severity of weed problems in dry direct-seeded rice. Integrated weed management is required to reduce over-reliance on post-emergence herbicides. This will require engagement with the local input supply network to introduce advice on improved weed management and sustainable herbicide use. direct-seeded rice weed management weed population shifts selective herbicides integrated weed management agricultural mechanisation Agriculture S Sokunroth Chhun verfasserin aut Sophea Yous verfasserin aut Ratha Rien verfasserin aut Chariya Korn verfasserin aut Pao Srean verfasserin aut In Agronomy MDPI AG, 2012 11(2021), 3, p 498 (DE-627)658000543 (DE-600)2607043-1 20734395 nnns volume:11 year:2021 number:3, p 498 https://doi.org/10.3390/agronomy11030498 kostenfrei https://doaj.org/article/91d9499a12434451a0c7038ec0ef9ced kostenfrei https://www.mdpi.com/2073-4395/11/3/498 kostenfrei https://doaj.org/toc/2073-4395 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 11 2021 3, p 498
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author	Robert Martin
spellingShingle	Robert Martin misc direct-seeded rice misc weed management misc weed population shifts misc selective herbicides misc integrated weed management misc agricultural mechanisation misc Agriculture misc S Survey of Weed Management Practices in Direct-Seeded Rice in North-West Cambodia
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topic_title	Survey of Weed Management Practices in Direct-Seeded Rice in North-West Cambodia direct-seeded rice weed management weed population shifts selective herbicides integrated weed management agricultural mechanisation
topic	misc direct-seeded rice misc weed management misc weed population shifts misc selective herbicides misc integrated weed management misc agricultural mechanisation misc Agriculture misc S
topic_unstemmed	misc direct-seeded rice misc weed management misc weed population shifts misc selective herbicides misc integrated weed management misc agricultural mechanisation misc Agriculture misc S
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title_sort	survey of weed management practices in direct-seeded rice in north-west cambodia
title_auth	Survey of Weed Management Practices in Direct-Seeded Rice in North-West Cambodia
abstract	Two-hundred rice farming households from eight lowland rice villages in North-West Cambodia were surveyed in 2020 to determine changes in farmers’ knowledge, weed management practices and weed seed contamination in seed kept for sowing. The major yield constraints cited by farmers were lack of water, inability to manage water and competition by weeds. Water shortages result in reduced crop establishment, non-optimal herbicide application timing and poor weed control. Reduced tillage, drill planting and use of pre-emergence herbicides can improve weed management. The adoption of drill planting improves crop establishment and enables the use of pre-emergence herbicides. Possible reasons for changes in weed problems include the change to a two-crop rice system in the wet season and spread of seeds by harvesting machines. The main weed seed contaminants of rice seed kept for sowing were <i<Echinochloa crus-galli</i<, <i<E. colona</i<, <i<Fimbristylis miliacea</i<, <i<Ischaemum rugosum</i< and <i<Melochia corchorifolia. F. miliacea</i< was the only species effectively removed by village cleaning methods. Although prevalent in rice fields, <i<Cyperus. iria</i< with <0.2 seeds per 500 g and <i<Leptochloa chinensis</i< with nil contamination were insignificant contaminants of seed samples. The majority of farmers in the study area are relying on repeated use of a narrow range of post-emergence herbicides, thus leading to increased severity of weed problems in dry direct-seeded rice. Integrated weed management is required to reduce over-reliance on post-emergence herbicides. This will require engagement with the local input supply network to introduce advice on improved weed management and sustainable herbicide use.
abstractGer	Two-hundred rice farming households from eight lowland rice villages in North-West Cambodia were surveyed in 2020 to determine changes in farmers’ knowledge, weed management practices and weed seed contamination in seed kept for sowing. The major yield constraints cited by farmers were lack of water, inability to manage water and competition by weeds. Water shortages result in reduced crop establishment, non-optimal herbicide application timing and poor weed control. Reduced tillage, drill planting and use of pre-emergence herbicides can improve weed management. The adoption of drill planting improves crop establishment and enables the use of pre-emergence herbicides. Possible reasons for changes in weed problems include the change to a two-crop rice system in the wet season and spread of seeds by harvesting machines. The main weed seed contaminants of rice seed kept for sowing were <i<Echinochloa crus-galli</i<, <i<E. colona</i<, <i<Fimbristylis miliacea</i<, <i<Ischaemum rugosum</i< and <i<Melochia corchorifolia. F. miliacea</i< was the only species effectively removed by village cleaning methods. Although prevalent in rice fields, <i<Cyperus. iria</i< with <0.2 seeds per 500 g and <i<Leptochloa chinensis</i< with nil contamination were insignificant contaminants of seed samples. The majority of farmers in the study area are relying on repeated use of a narrow range of post-emergence herbicides, thus leading to increased severity of weed problems in dry direct-seeded rice. Integrated weed management is required to reduce over-reliance on post-emergence herbicides. This will require engagement with the local input supply network to introduce advice on improved weed management and sustainable herbicide use.
abstract_unstemmed	Two-hundred rice farming households from eight lowland rice villages in North-West Cambodia were surveyed in 2020 to determine changes in farmers’ knowledge, weed management practices and weed seed contamination in seed kept for sowing. The major yield constraints cited by farmers were lack of water, inability to manage water and competition by weeds. Water shortages result in reduced crop establishment, non-optimal herbicide application timing and poor weed control. Reduced tillage, drill planting and use of pre-emergence herbicides can improve weed management. The adoption of drill planting improves crop establishment and enables the use of pre-emergence herbicides. Possible reasons for changes in weed problems include the change to a two-crop rice system in the wet season and spread of seeds by harvesting machines. The main weed seed contaminants of rice seed kept for sowing were <i<Echinochloa crus-galli</i<, <i<E. colona</i<, <i<Fimbristylis miliacea</i<, <i<Ischaemum rugosum</i< and <i<Melochia corchorifolia. F. miliacea</i< was the only species effectively removed by village cleaning methods. Although prevalent in rice fields, <i<Cyperus. iria</i< with <0.2 seeds per 500 g and <i<Leptochloa chinensis</i< with nil contamination were insignificant contaminants of seed samples. The majority of farmers in the study area are relying on repeated use of a narrow range of post-emergence herbicides, thus leading to increased severity of weed problems in dry direct-seeded rice. Integrated weed management is required to reduce over-reliance on post-emergence herbicides. This will require engagement with the local input supply network to introduce advice on improved weed management and sustainable herbicide use.
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title_short	Survey of Weed Management Practices in Direct-Seeded Rice in North-West Cambodia
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Survey of Weed Management Practices in Direct-Seeded Rice in North-West Cambodia

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