Screening of mango cultivars to postharvest fruit rots and biochemical changes during decay.
Jadeja K. B., Vaishnav M. U.
Author Affiliation: Department of Plant Pathology, College of Agriculture, Gujarat Agricultural University, Junagadh - 362 001, India.
Gujarat Agricultural University Research Journal 25 : 98-100
Abstract : Mango cultivars Kesar, Alphonso, Rajapuri, Totapuri, Langra, Asadio, Vanraj, Sardar, Makaram, and Badami were screened for their resistance to stem end rot (Lasiodiplodia theobromae) and black rot (Aspergillus niger). The biochemical changes were also studied. After 7 days of incubation, fruits of Makaram (5.0%) and Sardar (6.1%) were resistant and moderately resistant, respectively to stem end rot. Vanraj (22.8%), Rajapuri (23.3%), Asadio (42.2%), and Totapuri (46.7%) were susceptible, while Langra (51%), Badami (60%), Alphonso (60%) and Kesar (60%) were highly susceptible to stem end rot. In the case of black rot disease: Makaram(3.1%), Sardar (3.9%) and Vanraj (4.7%) were resistant; Rajapuri (6.5%), Asadio (7.2%), and Totapuri (8.9%) were moderately resistant; Langra (13.3%), Badami (17.8%), and Alphonso (19.5%) were moderately susceptible; Kesar (26.7%) was highly susceptible. The maximum reduction in pH and ascorbic acid content due to both the rots was recorded in Langra, while reduction in reducing sugar content was maximum in Badami (stem end rot) and Kesar (black rot). Reduction in sugar content under stem end rot and black rot infection was maximum in Totapuri and Kesar, respectively.