Investigating Weed Flora Changes in Irrigated Wheat) Triticum aestivum( Fields of Tehran Province in a Decade: 2005 to 2015

Document Type : Research Paper

Authors

1 Agronomy depatmeat, Faculty of Agricultural Fredowsi University of Mashhad,Iran

2 Faculty of Agricultural Fredowsi University of Mashhad ‎Mashhad, Iran

3 Iranian Research Institute of Plant Protection

Abstract

Abstract
A study was conducted to assess the weed flora changes in the irrigated wheat fields during the last decade in 52 fields located in seven cities at Tehran province in 2015. The frequency, Unifromaty and dominance index of species were calculated and they were compared with the mentioned indices from 2005. In 2015, 66 species of weedsfrom 26 families were identified, of which, 55 species were broad-leaf and the others were grasss. 10 species that had been observed in 2005 had been omitted from the fields and 15 new species from 11 families were identified. Amaranthaceae, Dipsacaceae, Plantaginaceae, and Solanaceae were the four families that were for the first times observed in the fields of the province for the first times. Brassicaceae, Poaceae and Asteraceae families were dominant families in the fields. The broadleaf species of flixweed, knotweed, bindweed and fumitory with dominance indices of 117/94, 97/82, 81/09 and 46/11 and the grasss of wild oat,wild barley,annual ryegrassferalrye with dominance indices of 86/59, 50/94, 27/64 and 15/41 had the greatest dominance indices respectively. The differences of dominance index of the most species were negative. The results of study indicated the dominance reduction of the most weeds and their control improvementy although in a few number of weeds such as wild mustard and catchweed, an increase in the dominance index was observed.

Keywords

Main Subjects

References

 
 
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Iranian Journal of Weed Science
Volume 13, Issue 2
January 2018
Pages 157-173

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