Field Experiment on Efficacy of Four Fungicides against Black Spot inCaryaillinoensis

Field experiments were conducted on spraying 4000-fold of Trifloxystrobin + Tebuconazole 75% WG, 1500-fold of Difenoconazole?Azoxystrobin SC, 2000-fold of Difenoconazole + Propiconazole EC and 400-fold of Mancozeb WP to control black spot of Caryaillinoensis‘Mahan’ in Jiande, Zhejiang province respectively in April, July and August.The results showed that three first-mentioned fungicides had better control effect on leaf and fruit black spot, with later leaf fall and more yield compared with that of the control.Spraying 4000-fold of Trifloxystrobin + Tebuconazole 75% WGhad the best control effect on black spot in leaf and fruit, 97.06% and 98.16% respectively, with 98 days later of leaf fall, and 362.86% of the yield of the control.Followed by 1500-fold of Difenoconazole?Azoxystrobin SC.