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

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Wilberth Chan-Cupul https://orcid.org/0000-0001-8634-3618
Julio Ruelas-Jurado
Juan Carlos Sánchez-Rangel https://orcid.org/0000-0002-9301-7623
Marco Tulio Buenrostro-Nava https://orcid.org/0000-0003-3526-8667
Gilberto Manzo-Sánchez

Keywords

fungal disease, chemical control, postharvest, severity.

Resumen

Objective: To evaluate the efficacy of chemical fungicides against Colletotrichum gloeosporioides in papaya fruits.


Design/methodology/approach: The effect of four chemical fungicides (A+F=azoxystrobin + fludioxinil, C+F=cypronil + fludioxinil, B+P=boscalid + pyraclostrobin and T=tiabendazole) at 250, 500, 750, and 1000 mg kg-1 were assessed on severity and the area under the disease progress curve (AUDPC) of Colletotrichum gloeosporioides inoculated on papaya fruits.


Results: At 12 days after inoculation (dai) A+F achieved a range of effectiveness between 63.0 (250 mg kg-1) to 77.52 (1000 mg kg-1); while the range of effectiveness for T was 12.8% (250 mg kg-1) to 74% (1000 mg kg-1). Both fungicides achieved the highest effectiveness at 1000 mg kg-1 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 mg kg-1 of T achieved the lowest AUDPC than 250 and 500 mg kg-1.


Findings/conclusions: The fungicides A+F and T achieved adequate control of anthracnose in papaya fruits and the use of the diagrammatic logarithmic scale is easy to use to give a quick estimate of the disease, as well as being easy to reproduce.

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