Study on the Occurrence and Control of Chinese Fir Anthracnose Disease

The anthracnose of Chnese fir which infected needles and tender shoots of the tree was a serious disease in young stands of 6～10 years old in Wenchuan. The disease was caused by Glomerrlla cingulata(Stonem.)S. et S.,and the height and diameter growth of the infected young trees were decreased by 28.6%and 32.1% respectively. The seasonal epidemic began in April,reaching its peak in June when the conditions were most favorable for the disease development,and gradually ceased in October. Several preventive measures can be taken before May,including the application of fungicides of Daconil,Mildothane and fertilization along with improved management.The treated trees increased their height and diameter growth by 38.8% and 23.8% respectively,and totally in 8 years of treatment,10 130 m3 of wood,otherwise lost,was regained.