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Abstract
Weeds inventory survey and phytosociological studies have been conducted in the sugarcane fields of Visakhapatnam district, Andhra Pradesh during the period 2012 to 2013. The survey has been carried out at 100 randomly selected sugarcane fields and well explored covering all the geographical areas of Visakhapatnam district, to identify the weed flora, species composition, density, frequency and importance values index (IVI). A total of 88 plant species, belonging to 75 genera and 33 families were identified. Among the 33 families have been recorded, out of these 16 families are representing each species. Asteraceae is the largest family representing 10 species, Poaceae occupies the second position with 8 species followed by Amaranthaceae and Euphorbiaceae having 7 species each, Malvaceae 6, Acanthaceae and Convolvulaceae having 5 species each. The results of phytosociological studies revealed that the species are Cyperus rotundus (42%) Malvastrum coromandelianum (2.4) most abundant weeds.
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