10.22376/ijpbs.2019.10.1.p1-12 Volume 2 Issue 4 2011 (October - December) The gram pod borer lessThan i greaterThan Helicoverpa armigera(Hubner) lessThan /i greaterThan (Lepidoptera: Noctuidae) is an important notorious pest of more than 100 cultivated and wild plants all over the world. Switching off of pest control strategies from chemical to biological using microbial and herbal biopesticides are becoming more viable due to their sustainability in the environment. In the present study, ethanolic leaf extracts were fed to fifth instar larvae and the process of infections were assessed on the basis of morphological changes followed by alteration in the midgut tissues. The treated larvae showed sluggishness,cessation of feeding and gradual shrinking of larval body leading to death at last.The midgut tissues were completely distrophied with thin and feeble architecture.Columnar epithelial cells became shrunken with atrophied nuclei.Peritrophic membrane became merged with midgut tissues allowing tissues ooze to mingle with the lumen.Ultimately, only some cytoplasmic residues were left in the cavity.Thus, plant leaf showed its potential in controlling notorious pest by exerting its effect on the feeding process of the insects. Arti Prasad And Sujoita Burmon Roy Helicoverpa armigera(Hub),Lantana camara(L),leaf extract,columnar epithelium,goblet cells,regenerative cells,peritrophic membrane 613-620