in vitro antifungal effect of aloe vera and cinnamon essential oil incorporated aloe vera on stem-end rot pathogens of mango (cv. karthakolomban)

Purpose: this research was conducted to determine the in vitro antifungal effect of aloe vera and cinnamon oil incorporated aloe vera on stemend rot pathogens isolated from karthakolomban mango. research method: effect of aloe vera gel was determined using a liquid bioassay against the selected pathogens. same bioassay was conducted to determine the effect of combinations of aloe vera gel + cinnamon leaf and bark oils. a minimum inhibitory (mic) and minimum lethal (mlc) concentration for each pathogen was determined. findings: aloe vera at 10% v/v showed the best effect against pestalotiopsis sp. and phomopsis sp. whereas lasiodiplodia theobromae was controlled at the highest percentage at 12.5% v/v concentration. the mlc of aloe vera + cinnamon leaf oil and aloe vera + cinnamon bark oil against pestalotiopsis were identified as 10% + 0.50 µl/ ml and 10% + 0.60 µl/ ml respectively. the mlc against phomopsis for aloe vera + cinnamon leaf and aloe vera + cinnamon bark oils were identified as 10% + 0.80 µl/ ml, and 10% + 0.50 µl/ ml, respectively. when considering l. theobromae, concentrations of 12.5% + 0.60 µl/ ml and 12.5% + 0.15 µl/ ml were identified as the mlc for aloe vera + cinnamon leaf oil and aloe vera + cinnamon bark oil respectively. limitations: aloe vera gel without cinnamon oils was unable to inhibit fungal growth completely. originality/value: this study reveals the potential of using cinnamon oil in combination with aloe vera as a preservative treatment against stemend rot pathogens of mango.