Abstract
Distribution of various weeds in the fields of Okra, Sponge-gourd, Bitter-gourd and Red-gourd in Tehsil Gojra, District Toba Tek Singh, Punjab, Pakistan was investigated during 2007-2008 and forty weed species of seventeen different angiosperm families were identified with Poaceae having the maximum of weeds species, i.e. 10 while eleven families had only single weed species in each. The Family Importance value Index (FIVI) of Cyperaceae and Poacaeae were 2.67 and 5.40 respectively. On the other hand, among the dicot families, the FIVI of 7 weed species of Asteraceae was 5.55. Euphorbiaceae and Solanacae had 6.1 and 3.68 while F1V1 of each weed species of remaining ten families ranged between 20.73 to 2.46. On the basis of percentage frequency distribution, 35 weed species were found below average, 3 on average while one (Cynodon dactylon) assertive and one Convolvulus arvensis ascendant in distribution.
