Anthracnose: Dark brown depressed spots on fruits

Pathogen: Colletotrichum gloeosporioides

Symptoms

Both tender and mature fruits develop spots which are initially circular later becoming irregular, brown to dark brown covering the fruit partly or wholly with sunken centres.​

Disease development

Primary source of inoculums is infected leaves. Secondary source of inoculums is wind born conidia. The disease is severe during August-September when there is high humidity and the temperature between 20-27ºC.

Control

Carbendazim/ Difenconazole or Thiophanate methyl at 0.25ml/lit sprays at fort-nightly intervals have been found effective. Spraying of Difenconazole 25 EC at 1.0 ml/lit or Prochloraz 45 EC at 0.75ml/lit were effective against anthracnose disease. Spraying of systemic fungicides namely Hexaconazole @1ml/lit / Thiophanate methyl @ 1g/lit/ Carbendazim @ 1g/lit at 20 days interval is quite effective. Among the contact fungicides Chlorothalonil (2g/l) followed by Mancozeb (2g/l) were more efficacious.

#Fungal