Weed species and their population changing in Nanjing Zhongshan International Golf Course

To formulate the strategics of weed control in bumudagrass(Cynodon dactylon × C. transvaalensis), by analyzing the passable factors of weed damaging the turf in Golf courses. This investigation was conducted at Nanjing Zhongshan International Golf Course between 2000 and 2016 to determine the weed species and population changing by the survey and special designated. The 130 weed species found included 27 grasses, 8 sedges, 94 broadleaved and 1 alga from 36 families. Among them, 63 species from 28 families found in 2000-2016; 13 species from 9 families found in 2006-2016; 54 species from 20 families found before 2009, unfound after 2010. The study indicated that the weed population in the plots was not only abundant and diversified, related gathering to some certain families such as Gramineae, Compositae,Cyperaceae, Crucifereae and so on, but also was changing with growing or declining in the related stable community. By the end of 2016, Digitaria sanguinalis, Poa annua, Lolium perenne and Agrostis stolonifera was still harmful to the bumudagrass(Cynodon dactylon × C. transvaalensis)in some part of the plots. Solidago canadiensis was expanding and Aster stubulatus was found in the out side of rough areas.These two weeds had expanded to the some of the golf plots in east China.