Postharvest disease management of Guava caused by Colletotrichum gloeosporioides (Penz.) Penz. And Sacc.
Loading...
Date
2022-09, 2022-09
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
G. B. Pant University of Agriculture and Technology, Pantnagar
G. B. Pant University of Agriculture and Technology, Pantnagar
G. B. Pant University of Agriculture and Technology, Pantnagar
Abstract
Guava anthracnose caused by {Colletotrichum gloeosporioides (Penz.) Penz. and Sacc.) is one of the most destructive post harvest disease in India causing huge economic losses during transit and storage at market level. In Uttarakhand, the disease showed an increasing trend in all the fruit markets from 2021 to 2022.The disease severity of anthracnose in different locations in Uttarakhand market varied from 5.20 to 26.50percent. The highest mean disease incidence ranged from 15 to 50 percent was observed in both of the year. The disease was more severe in Dehradun and least in Lalkuan (Nainital) district. Biochemical changes in guava like total soluble solids, acidity, ascorbic acid, sugars, total flavonoids content, phenolic content, antioxidants were recorded under each treatment overa storage period of 12 days. Chitosan (1.5%), calcium chloride (1.50% and 2.50%) and Aloe veral: l gel treatment was most effective in maintaining shelf life, enhancing biochemical quality and in reducing postharvest losses in guava fruits. Among the post harvest dip treatment of fungicides, Tebuconazole + Trifloxystrobin at 0.15 per cent concentration was found most effective in respect of checking the anthracnose severity development in treated fruits of guava cv. L- 49.Antagonistsevaluations revealed that the Trichoderma +Pseudomonas fiuorescens at 15 g/1 concentration was found promising against the pathogen in reducing severity (79.70%) in guava. In addition the activity of inorganic salts, Calcium chloride at 2.50percentwas found highly effective in reducing disease severity (72.24%) over check. Among the plant extracts Aloe vera (1:3) was found to be the best in checking the severity of anthracnose providing (56.13%) reduction over check. Zinc oxide (0.50%) was found to be more effective among all the nano particles in reducing the disease severity. Hot water treatment at 57°C was found effective than UV irradiation showing least disease severity. Among the elicitors Salicylic acid at 2mM concentration was found to be most effective in reducing disease severity in cv. L-49 during storage. Our results suggested that susceptibility of guava cv. L-49 to anthracnose during storage is dependent on the high temperature which favours the attack of fungal pathogens causing post harvest anthracnose. Further our results indicate that effective management strategy helps in reduction of anthracnose disease as well as maintains quality of fruit.
Guava anthracnose caused by {Colletotrichum gloeosporioides (Penz.) Penz. and Sacc.) is one of the most destructive post harvest disease in India causing huge economic losses during transit and storage at market level. In Uttarakhand, the disease showed an increasing trend in all the fruit markets from 2021 to 2022.The disease severity of anthracnose in different locations in Uttarakhand market varied from 5.20 to 26.50percent. The highest mean disease incidence ranged from 15 to 50 percent was observed in both of the year. The disease was more severe in Dehradun and least in Lalkuan (Nainital) district. Biochemical changes in guava like total soluble solids, acidity, ascorbic acid, sugars, total flavonoids content, phenolic content, antioxidants were recorded under each treatment overa storage period of 12 days. Chitosan (1.5%), calcium chloride (1.50% and 2.50%) and Aloe veral: l gel treatment was most effective in maintaining shelf life, enhancing biochemical quality and in reducing postharvest losses in guava fruits. Among the post harvest dip treatment of fungicides, Tebuconazole + Trifloxystrobin at 0.15 per cent concentration was found most effective in respect of checking the anthracnose severity development in treated fruits of guava cv. L- 49.Antagonistsevaluations revealed that the Trichoderma +Pseudomonas fiuorescens at 15 g/1 concentration was found promising against the pathogen in reducing severity (79.70%) in guava. In addition the activity of inorganic salts, Calcium chloride at 2.50percentwas found highly effective in reducing disease severity (72.24%) over check. Among the plant extracts Aloe vera (1:3) was found to be the best in checking the severity of anthracnose providing (56.13%) reduction over check. Zinc oxide (0.50%) was found to be more effective among all the nano particles in reducing the disease severity. Hot water treatment at 57°C was found effective than UV irradiation showing least disease severity. Among the elicitors Salicylic acid at 2mM concentration was found to be most effective in reducing disease severity in cv. L-49 during storage. Our results suggested that susceptibility of guava cv. L-49 to anthracnose during storage is dependent on the high temperature which favours the attack of fungal pathogens causing post harvest anthracnose. Further our results indicate that effective management strategy helps in reduction of anthracnose disease as well as maintains quality of fruit.
Guava anthracnose caused by {Colletotrichum gloeosporioides (Penz.) Penz. and Sacc.) is one of the most destructive post harvest disease in India causing huge economic losses during transit and storage at market level. In Uttarakhand, the disease showed an increasing trend in all the fruit markets from 2021 to 2022.The disease severity of anthracnose in different locations in Uttarakhand market varied from 5.20 to 26.50percent. The highest mean disease incidence ranged from 15 to 50 percent was observed in both of the year. The disease was more severe in Dehradun and least in Lalkuan (Nainital) district. Biochemical changes in guava like total soluble solids, acidity, ascorbic acid, sugars, total flavonoids content, phenolic content, antioxidants were recorded under each treatment overa storage period of 12 days. Chitosan (1.5%), calcium chloride (1.50% and 2.50%) and Aloe veral: l gel treatment was most effective in maintaining shelf life, enhancing biochemical quality and in reducing postharvest losses in guava fruits. Among the post harvest dip treatment of fungicides, Tebuconazole + Trifloxystrobin at 0.15 per cent concentration was found most effective in respect of checking the anthracnose severity development in treated fruits of guava cv. L- 49.Antagonistsevaluations revealed that the Trichoderma +Pseudomonas fiuorescens at 15 g/1 concentration was found promising against the pathogen in reducing severity (79.70%) in guava. In addition the activity of inorganic salts, Calcium chloride at 2.50percentwas found highly effective in reducing disease severity (72.24%) over check. Among the plant extracts Aloe vera (1:3) was found to be the best in checking the severity of anthracnose providing (56.13%) reduction over check. Zinc oxide (0.50%) was found to be more effective among all the nano particles in reducing the disease severity. Hot water treatment at 57°C was found effective than UV irradiation showing least disease severity. Among the elicitors Salicylic acid at 2mM concentration was found to be most effective in reducing disease severity in cv. L-49 during storage. Our results suggested that susceptibility of guava cv. L-49 to anthracnose during storage is dependent on the high temperature which favours the attack of fungal pathogens causing post harvest anthracnose. Further our results indicate that effective management strategy helps in reduction of anthracnose disease as well as maintains quality of fruit.