la Efficacy of chemical fungicides against the anthracnose disease caused by Colletotrichum gloeosporioides in Carica papaya fruits

Abstract

The objective of this study was to evaluate severity, effectiveness, and the area under the disease progress curve (AUDPC) of chemical four fungicides (A+F=azoxystrobin + fludioxinil, C+F=cypronil + fludioxinil, B+P=boscalid + pyraclostrobin and T=tiabendazole) at 250, 500, 750, and 1000 ppm against Colletotrichum gloeosporioides in papaya. At 12 days after inoculation (dai) A+F achieved a range of effectiveness between 63.0 (250 ppm) to 77.52 (1000 ppm); while the range of effectiveness for T was 12.8% (250 ppm) to 74% (1000 ppm). Both fungicides achieved the highest effectiveness at 1000 ppm that C+F (38.5%) and B+P (55.6%). The AUDPC achieved the same value at the four studied concentration in A+F, C+F, and B+P. Only 750 and 1000 ppm of T achieved the lowest AUDPC than 250 and 500 ppm. In conclusion, A+F and T achieved adequate control of anthracnose in papaya fruits.