Trichoderma sp. as a biological control agent in the post harvest treatment of mango stem end rot
Suhanna, A., Norhanis, Y., Shazalwardi, S.
Abstracts of 7th International Postharvest Symposium 2012 (IPS2012). 25-29 June, 2012. Putra World Trade Centre (PWTC), Kuala Lumpur, Malaysia. 238 pages.
2012
บทคัดย่อ
Stem end rot caused by Botryodiploidia theobromae is one of the most economic important diseases of mango. Currently the disease is controlled by fungicide. Due to the residual effect and biosafety issue to the health and environment caused by fungicide, this study was initiated to investigate the potential use of fungal antagonist (Trichoderma sp.) against B.theobromae and its effectiveness as compared to fungicide. The mango variety Sala was used in this study. Treatments applied were propiconazole sprayed at 500 ppm and three different spore concentrations at 1 x 103, I x 106 and 1 x 108 conidia/mL of Trichoderma sp. with and without inoculation of B. theobromae. The severity of the disease was determined at 0, 2, 4, 6 and 8 days post inoculation based on disease lesion. When B. theobromae inoculated on mango, spore concentration of Trichoderma 1 x 106 and 1 x 108 conidia/mL showed good potential to control stem end rot but control levels was not as high as using Propiconazole. All the fruits without inoculation with B. theobromae did not develop any disease symptom until day 4 for all treatments. Treating the mangoes by spraying with three different spore concentration of Trichoderma sp and 500ppm Propiconazole did not have significant effect as compared to untreated (control) mango. Disease started to develop at day 6 for fruit sprayed with all the three concentrations. All treatments including control showed that the percentage oflesion had a value ranging from 0-2%. This study revealed that fungal antagonist of Trichoderma sp. with spore concentration of 1 x 108 and 1 x 106 conidia/mL has a potential to be further evaluate.