Vol. 6, Issue 4 (2018)
Impact of oviposition of shoot gall psylla, Apsylla cistellata Buckton on gall formation and panicle emergence in mango
Author(s): Jyoti Raina and Poonam Srivastava
Abstract: The aim of this study was to determine the effects of shoot gall psylla, Apsylla cistellata oviposition on the galls formation and panicles emergence, which ultimately results in no fruiting. Results indicated that galls were not formed on the twigs (40 cm) without eggs, whereas, those with eggs found to bear varying number of galls (5.92 - 41.01 galls/twig). The maximum number of galls (41.01 and 40.11 galls/twig) were formed on the twigs carry eggs at their maximum (200 eggs/twig), during both the years of investigation. It was observed that as the number of eggs increased on the leaves of twig (40 cm), gall formation increased proportionately, however, panicles emergence decreased proportionately with the egg number. The maximum number of panicles emergence (3.25 and 3.15 panicles/ twig) was initiated on leaves without eggs (0.00 eggs/ twig), which further reduced in case of leaves with 10 eggs (1.65 and 2.14 panicles/twig), followed by leaves with 50 eggs (1.09 and 1.01 panicles/twig) and 0.45 and 0.50 panicles/twig were found in case of leaves with 100 eggs. Whereas, no panicle emergence (0.00 panicle/ twig) was found on the leaves with 200 eggs/ twig, during the year 2016 and 2017, respectively. Correlation analysis also revealed a positive significant relationship between the number of eggs and a total number of galls formed/twig (r = 0.923, 0.916), whereas, significant negative relationship (r= -0.885, -0.881) was found between eggs number and panicle emergence during both the years of experiment.
Pages: 149-153 | 851 Views 86 Downloads
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How to cite this article:
Jyoti Raina, Poonam Srivastava. Impact of oviposition of shoot gall psylla, Apsylla cistellata Buckton on gall formation and panicle emergence in mango. Int J Chem Stud 2018;6(4):149-153.
