Vol. 4, Issue 6 (2019)
Bio-efficacy of some green pesticides against Brevipalpus Karachiensis Chaudhri et al. (Acari: Tenuipalpidae) infesting Justicia Adhatoda l. Nees (Family: acanthaceae) under laboratory condition
Author(s): Afsana Mondal, Dr. Salil Kumar Gupta
Abstract: Laboratory bioassay with 4 green pesticides, viz. custard apple, and citrus each of 2% and 5% concentrations, Neem oil (1ml+10ml water and 2ml+10ml water) and chili paste+ water 6gm+50 ml water and 12gm+50 ml water, against Brevipalpus karachiensis Chaudhri et al. revealed that all the green pesticides proved their acaricidal effects with varying degrees of efficacies. Among the green pesticides the overall mortality at lower concentration, custard apple 2% recorded highest mortality of 74.48% followed by Citrus 2% of 73.54% while Neem oil+ water was the poorest among all (mortality 61.73%). At higher concentration, chili paste +water was the best (79.79% mortality) followed by citrus 5% (78.49%) and Neem oil was the poorest recording mortality of 74.07%. Since chili paste + water treatment (12gm+50ml water) appears to be easily available, performed best and least costly, this treatment may be used for control of this mite on Justicia Adhatoda.