Assessment of loss in yield of mango (Mangifera indica) caused by mango malformation.
Kumar R., Chakrabarti D. K.
Author Affiliation: Narendra Deva University of Agriculture and Technology, Faizabad 224 229, UP, India.
Indian Journal of Agricultural Sciences 67 : 130-131
Abstract : Yield losses attributed to malformed panicles were determined in Faizabad during 1993-94 for 7-year-old trees of alternate-bearing cultivars Dashehari, Langra, Himsagar and Gilas, and the regular-bearing Neelam. The relationship between frequency of malformed panicles and yield losses was determined by linear regression. Fruit yield in Dashehari was affected by the number of non-bearing panicles and not malformed ones. For all cultivars, number of malformed panicles was negatively related to the number of non-bearing panicles. Malformation did not affect flowering either in the same or subsequent year, but an increase in the number of inflorescences coincided with a greater incidence of malformation. Yield losses for Neelam, Langra, Himsagar and Gilas were 36.2, 2.3, 15.7 and 41.5%, respectively. Yield declined by 0.2, 0.6, 0.89 and 0.96% for every 1% increase in the number of malformed panicles in Langra, Himsagar, Gilas and Neelam, respectively. For the regular bearer, Neelam, yield losses could be predicted by counting the number of malformed panicles, provided the number of non-bearing panicles was not unduly affected by biotic or abiotic stress.