Author(s):

Niranjanadevi Jeevanandham and Ganapathy N

Abstract: Field experiments were conducted to evaluate the bioefficacy of chlorpyriphos 20 EC as foliar application against leaf miner in citrus with two rounds of chlorpyriphos 20 EC @ 250, 500, 750, 1000 ml/ha, Dursban 20 EC (standard check) 500 ml/ha and dimethoate 30 EC @ 500 ml/ha applied at the initiation of new flush followed by the second spray 14 days later. The mean leaf damage was the lowest (9.18%) in plots that received chlorpyriphos 20 EC 1000 ml/ha followed by chlorpyriphos 20 EC 750 ml/ha (9.39%), chlorpyriphos 20 EC 500 ml/ha (9.86%) and Dursban 20 EC 500 ml/ha (11.84%). Reduction in damage over control was maximum due to chlorpyriphos 20 EC 1000 ml/ha (63.21%) and chlorpyriphos 20 EC 750 ml/ha (62.40%).This was followed by chlorpyriphos 20 EC 500 ml/ha (60.47%), Dursban 20 EC 500 ml/ha (58.59%), dimethoate 30 EC 500 ml/ha (52.41%) and chlorpyriphos 20 EC 250 ml/ha (50.54%).

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