The inhibitory effect of grasshopper's cyperus (cyperus iria l.) on the seedling growth of five malaysian rice varieties

Ismail Sahid, Mohammed Abu Bakar Siddique

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Experiments were carried out in the laboratory and greenhouse to determine the growth inhibitory effects of Grassohopper's cyperus (Cyperus iria L.) on the seedlings of 5 Malaysian rice varieties namely MR211, MRQ74, MR220, MR84 and MR232. Three concentrations of the aqueous extract of the weed (12.5, 25.0 and 50.0 g/l) and weed debris (5, 10 and 20 g dry debris/1000 g soil) were used to test the allelopathic effect of C. iria on the growth of the rice plants. The weed leaf, stem and root extracts reduced the growth of the rice seedlings and showed selective activity in the varieties. The C. iria leaf and stem extracts showed comparatively higher growth inhibitory effects than those from the root. The weed extract caused more reduction in the root length of the rice plant compared to the shoot length. Among the rice varieties tested, MR232 was found to be more susceptible to the weed inhibitory effect. The leaf extract of C. iria at full strength caused root and shoot reduction of MR232 by 88.1% and 73.1% respectively (compared to the control). In most cases the fresh weight of the rice seedlings were more affected than the plant height. Weed debris caused significant reduction of leaf chlorophyll content in all the rice varieties tested with the exception of MR211. The chlorophyll content of MR232 was greatly affected by the weed debris which caused reduction of 36.4% compared to the control. The inhibitory effects of weed extracts and debris on rice growth parameters were found to be concentration dependent.

Original languageEnglish
Pages (from-to)81-89
Number of pages9
JournalTropical Life Sciences Research
Volume22
Issue number1
Publication statusPublished - May 2011

Fingerprint

Cyperus iria
Cyperus
Grasshoppers
grasshoppers
Seedlings
Debris
seedling growth
weeds
rice
Growth
Chlorophyll
extracts
Greenhouses
seedlings
chlorophyll
leaves
stems
shoots
Oryza
Soils

Keywords

  • Allelopathy
  • Aqueous extract
  • Chlorophyll
  • Cyperus iria
  • Debris

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Medicine(all)

Cite this

The inhibitory effect of grasshopper's cyperus (cyperus iria l.) on the seedling growth of five malaysian rice varieties. / Sahid, Ismail; Siddique, Mohammed Abu Bakar.

In: Tropical Life Sciences Research, Vol. 22, No. 1, 05.2011, p. 81-89.

Research output: Contribution to journalArticle

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