Percent mortality (mean ± SE) of 3rd instar nymphs of mealybug Drosicha mangiferae after application of phytoextracts at different time intervals, Ai = Azadirachta indica, Ec = Eucalyptus camaldulensis, Ds = Datura stramonium, Ca = Chenopodium album, Cc = Cymbopogon citratus, Co = control. For each time interval, different letters at bar tops indicate statistical significance among the treatments (factorial ANOVA; HSD at α = 0.05).