Impact of number of sprays of insecticides on management of shoot gall psylla Apsylla Cistellata Buckton in Mango

Abstract

Field investigations were conducted during 2014–15, 2015–16 and 2016–17 to evaluate the impact of number of sprays of insecticides on management of shoot gall psylla Apsylla cistellata Buckton in mango cv. Dashehari. Two sprays of thiamethoxam+ profenophos during second fortnight of August to first week of September resulted in maximum yield, gross and net returns, and gave tremendous impact with reduction of incidence of shoot gall psylla and drying of branches. Neverthless, one spray of thiamethoxam + profenophos exhibited maximum C: B ratio i.e. 3.33 during 2015–16 and 2.44 during 2016–17 which was superior over all other treatments including two sprays, and with less expenditure. Thus either one or two sprays of thiamethoxam+ profenophos gave almost similar result in terms of yield, gross and net returns and reduction in incidence. Therefore, single spray helped the farmers in effective, economical and ecofriendly management of shoot gall psylla in mango. These results also reveal that the three sprays of monocrotophos, quinalphos and dimethoate recommended earlier neither provide satisfactory results nor cheaper, as compared to one or two sprays of thiamethoxam + profenophos.