The Investigation on Turf Weeds in Ya'an Area

The weeds of cold season turf in Ya'an Area of Sichuan Province were sorted out and the regulanrity of their appearance were studied based on 2 year's investigation. The results show that the 37 common species of turf weeds can be grouped into 22 families. Among them, the major species are Alternanthera philoxeroides, Oxalis corniculata, Veronica agrestis, Plantago asiatica, Cerastium furcatum and Stellaria media, which dominate the weed community. The climax periods of occurrence for weeds are April to May and Sep. to Oct. In late spring and early summer, the weeds can appear in great amout and cause severe damage to the turf.