Efficacy of cobalt and silver ions and free radical scavangers to alleviate fruit drop in mango
1999
Dhillon, B.S. | Singh, Zora | Singh, Sukhbir(Punjab Agricultural University, Punjab (India). Dept. of Horticulture)
Effect of aqueous solutions spray of cobalt sulphate, cobalt nitrate or silver nitrate (0, 50, 100, 200 ppm), and free radical scavangers viz. n-propyl gallate, sodium benzoate (0, 100, 200, 400 ppm) and 2,4-D (10 ppm) on fruit drop and yield in mango (Mangifera indica L.) cv. Langra was investigated. The panicles on the trees were sprayed to run off on March, 8 (15-20 days fruit set) and agian a week later on March, 15. All spray treatments of cobalt, silver, n-propyl gallate and soium benzoate reduced the fruit drop as compared with the control trees. The spray applications of cobalt sulphate (200 ppm) has significantly reduced fruit drop (97.25 percent) as compared to control (99.90 percent) and earlier recommended treatment of 10 ppm 2,4-D. The fruit drop was also significantly reduced with the spray treatment of silver sulphate (200 ppm) as compared to the control and 2,4-D (10 ppm) treatment. The spray application of n-propyl gallate or sodium benzoate did not prove better as compared to the treatments of cobalt and silver to alleviate fruit drop. All treatments, which reduced the fruit drop, have improved the fruit yield. The fruit quality was not affected significantly by any of the treatment as compared to control.
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