Some ecological aspects of Noorda blitealis as the major defoliating pest of Moringarnstenopetala, were studied in Konso area, Ethiopia. The density of immature stages ofrnNoorda blitealis on Moringa trees were investigated in different months of the year. Inrnaddition, the host range, major predators of the pest and control aspect of this pest usingrnbotanical extract from seeds of Melia azedarach has been conductedrnThe result showed significant (P < 0.05) difference on the egg densities of the pest on thernhost trees during the study period, with maximum and minimum numbers recordedrnduring March and February, respectively. The difference in the number of caterpillars perrnhost plant in different months was significant (P < 0.05), where heavy infestation wasrnrecorded in April and relatively minimum infestation in February. Pupal density of thernpest showed significant (P < 0.05) difference during the study period, where thernmaximum number was found during February and the minimum number during April.rnThe relationship between pest density and weather factors was significant (P < 0.05) andrnpositive correlations (r = 0.899; r = 0.823) of rainfall and relative humidity respectivelyrnwith larval density. In the contrary, significant (P < 0.05) but negative correlations (r = -rn0.992; r = -0.885) of rainfall and relative humidity respectively with pupal density wasrnobserved. Noorda blitealis was found to have only one host plant, Moringa stenopetala inrnthe study area. In this study, Myrmicaria sp. and praying mantids were found to be thernlarval predators of the pest where significant (P < 0.05) difference was observed in thernnumber of larvae between Myrmicaria sp. nested trees and trees where this species werernnot nested. However, the number of larvae recorded between the Hymenopodidae nestedand the Hymenopodidae non nested host trees was not significant (P > 0.05). Melia seedrnwater extracts of different concentrations; (the 50g L-1, the 75g L-1) and 2ml L-1 (Dursbanrn48% EC) showed significant (P < 0.05) difference from the untreated control, for theirrnoviposition deterrence on the moths, and repellent activities against the caterpillars.rnHowever, there was no significant difference (P > 0.05) among the Melia and insecticiderntreatments. Melia seed extracts at 25g L-1 was not found to be significantly different (P >rn0.05) from the control. The toxicity effects of all the concentrations of these extracts onrnfilter paper showed no significant difference from the control while the chemicalrnpesticide showed significant (P < 0.05) difference. All the concentrations of the Meliarnseed extracts were not significantly different from the control in causing mortality on thernpredatory ants, where as significantly (P < 0.05) different mortality of the predatory antsrnwas observed on the insecticide treated filter paper.rnKey words: Botanicals, Extract, Melia azedarach, Moringa stenopetala, Noordarnblitealis, Predators,