MANAGEMENT OF POST HARVEST ANTHRACNOSE DISEASE OF MANGO CAUSED BY Colletotrichum gloeosporioides

Abstract

The present study has been conducted for the management of postharvest anthracnose of mango (Mangifera indica) at Plant Pathology Laboratory of Sher-e-Bangla Agricultural University during July-December 2017. The fruit market survey was conducted at three markets of Dhaka city viz. Kawran bazaar, Shyamoli and Mirpur-10. For the management of postharvest anthracnose disease, 13treatments were considered including control with three replications. The experiment was laid out in a Complete Randomized Design (CRD). The assigned treatments was as T = Autostin 50WDG at 500 ppm concentration, T 2 1 = Autostin 50WDG at 1000 ppm concentration, T = Tilt 250EC at 500 ppm concentration, T 4 = Tilt 250EC at 1000 ppm concentration, T = Dithen M-45 at 500 ppm concentration, T 6 = Diathen M-45 at 1000 ppm concentration, T 5 = Rovral 50W at 500 ppm concentration, T 8 = Rovral 50W at 1000 ppm concentration, T = Garlic extract 1:1 (Extract: water), T 10 = Garlic extract 1:2 (Extract: water), T = Alamanda extract 1:1 (Extract: water), T 12 3 7 11 = Alamanda extract 1:2 (Extract: water) and T = Control. Among the three fruit market, the highest disease incidence 18.62% and disease severity 14.78% of post-harvest anthracnose disease was recorded Kawran bazaar while the lowest disease incidence 12.52% and disease severity 9.32% was recorded Mirpur 10. In case of chemical and botanical fungicides, treatment, Tilt 250EC at 1000 ppm concentration showed the best performance in controlling mycelia growth of Anthracnose diseases. The highest growth inhibition of mycelia 82.12, 76.47 and 60.98% respectively at 3,5 and 7 DAI was reduced from the treatment Tilt 250 EC followed by Rovral and Autostin .Regarding percent (%) infected area, the lowest infestation 2.50, 3.00 and 4.50% at 3, 5 and 7 DAI, respectively and highest percent (%)

9 13reduction of infected area over control 92.13%, 92.06% and 92.80% at 3, 5 and 7 DAI, respectively was also achieved from the treatment, Tilt 250EC at 1000 ppm concentration. In terms of management practices using hot water treatment at 55°C treated mango showed the lowest mycelia growth of Anthracnose at 3, 5 and 7 DAI 3.78cm, 4.22cm and 5.60 cm, respectively and highest percentage of growth inhibition of mycelia 47.21cm, 45.76cm and 30.86cm at 3, 5 and 7 DAI, respectively. The lowest infected area 5.5%, 8% and 25.50% at 3, 5 and 7 DAI, respectively and highest by 81.67%, 85.45% and 72.28% at 3, 5 and 7 DAI, respectively.