Identification of resistant biotypes of Leptochloa chinensis in rice field and their control with herbicides

M. Motior Rahman, Ismail Sahid, M. Sofian-Azirun

Research output: Contribution to journalArticle

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Abstract

Weed populations of sprangletop (Leptochloa chinensis) such as Kampung Permetang (KP), Kampung Pida-Tiga (KPT), Sungai Baru (SB1 and SB2), Kampung Pida-Empat (KPE), Singkir Yan (SY), Tanjung Dawai (TD), Dulang Besar (DB) and Kampung Bahagia (KB1 and KB2) were collected from paddy (Oryza sp.) growing areas in Kedah, Malaysia to identify resistant biotypes and their method of control. Weed biotypes were evaluated against all varying rates of propanil, quinclorac and cyhalofop-butyl. Except SY, all weed populations showed resistance against propanil at the rate of 5500 ml a.i. ha -1, on the contrary all weed populations appeared as susceptible against higher rates of propanil (11000 ml a.i. ha -1) except SB2 and KB1. All populations except KP and SB1 were resistant against cyhalofopbutyl at rates of 800 and 1600 ml a.i. ha -1. Kampung Bahagia (KB2) against cyhalofop-butyl at rates of 800 and 1600 ml a.i. ha -1 appeared as resistant and susceptible, respectively. Resistant biotypes were two times strongly resistant to propanil while one time strongly resistant to cyhalofop-butyl, respectively, than susceptible biotypes. Regardless of rates, quinclorac was ineffective against any of the biotypes. Resistant biotype SB2 was controlled by combined application of propanil and cyhalofopbutyl at rates of 5500 and 800 ml a.i. ha -1.

Original languageEnglish
Pages (from-to)2904-2914
Number of pages11
JournalAfrican Journal of Biotechnology
Volume10
Issue number15
Publication statusPublished - 11 Apr 2011

Fingerprint

Propanil
Leptochloa chinensis
propanil
Herbicides
biotypes
paddies
cyhalofop
herbicides
weeds
quinclorac
Population
Malaysia
Oryza
control methods
cyhalofop-butyl

Keywords

  • Herbicides
  • Leptochloa chinensis
  • Paddy
  • Sprangletop

ASJC Scopus subject areas

  • Biotechnology
  • Applied Microbiology and Biotechnology
  • Genetics
  • Molecular Biology
  • Agronomy and Crop Science

Cite this

Identification of resistant biotypes of Leptochloa chinensis in rice field and their control with herbicides. / Motior Rahman, M.; Sahid, Ismail; Sofian-Azirun, M.

In: African Journal of Biotechnology, Vol. 10, No. 15, 11.04.2011, p. 2904-2914.

Research output: Contribution to journalArticle

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