Abstract
Major constrain of crop production are weeds but they are also consider as important aspect of agricultural system in the world. Weeds are wild plants grow in an environment without the contribution of any human activities that that have positive or negative impact to the environment. The study aims at carrying a survey on weeds of family Asteraceae grown in cultivated environment with purpose of recording and identification. The study was conducted in the Taif region of Saudi Arabian kingdom in a mountain with an elevation level of (Area A = Al sail 1700 m, Area B = Al Wahat and Al Watit 1500, C = Leeih 1500, D = AL Gaim and Saisad 1500, F = E = Al Shafa 2200 m, F = AL Hada = 2000 m). The study was conducted between December 2018 to August 2019. The study was carried out based on enviromental survey. Diverse number of weeds were identified and collected from the examined study area. Results revealed aggressive weeds species. Agratum conyzoides, Aster subalatus, Calendula tripterocarpa, Centure sp, Cirsium arvense, Conyza dioscoridis, Coreopsis drummondii, Echinops spinosissimus, Eclipla alba, Eclipta prostrate, Emilia sonchifolia, Flavaria trnervia, lactuca sativa, launaca capitate, Pennsylvania state,Prickiy lettace, Pulicaria crispa, Saussurea japonica, Senecio scundens, Sonchus asper, Sonchus oleraceus and Verbesina encelioides. Similarly, sixteen agricultural crops were documented from the study area; Allium cepa, Brassica oleracea var. botrytis, Anethum graveolens, Raphanus sativus, Allium ampeloprasum var, Solanum melongena, Medicago sativa, Lactuca sativa, Punica granatum, Solanum lycopersicum, Vitis spp, Brassica oleracea var. capitate, Cucurbita pepo, Phoenix dactylifera, Rosa damascene and Mentha. Results of the survey obtained from the study would be useful in creating management control and proposing research toward improved new weed control measures. Also has provided insight on purposeful weeds control in Taif Area. The study recommends further studies on order types of weeds in the area.