R Nithiyagowry, K Thulashi<\/p>\n
The rice weevil,\u00a0Sitophilus oryzae<\/em>\u00a0Linnaeus is one of the most important pests in stored rice. Since rice is a crucial staple food with seasonal availability, ensuring a continuous supply for consumers is essential. Therefore, it is imperative to protect against pest infestations during storage. In order to find efficacy of methanol leaf extracts of Nishinda,\u00a0Vitex negundo<\/em>\u00a0on development of ovary of rice weevil\u00a0Sitophilus oryzae<\/em>\u00a0(L.), methanol leaf extracts of\u00a0V.negundo<\/em>\u00a0prepared at laboratory and tested at three concentrations of 0.025g\/ml, 0.075g\/ml, and 0.125g\/ml along with solvent control and untreated control by measuring the length of germerium, vitellarium and ovariole. Methanol leaf extract of\u00a0V.negundo<\/em>\u00a0at 0.125g\/ml significantly (P<0.05) reduced the lengths of gemarium, vitellarium, and ovariole than that of controls as a result fecundity of\u00a0S. oryzae<\/em>\u00a0is reduced. This study revealed that high concentration of (0.125g\/ml)\u00a0V.negundo<\/em>\u00a0found as most effective in reduction in the development of the ovary by reduction of length of gemerium, vitellarium and ovariole. Thereby it leads to a reduction in fecundity of\u00a0S.oryzae<\/em>\u00a0and\u00a0V. negundo<\/em>\u00a0plant can be considered as a potential pesticidal plant for control the pest.<\/p>\nDownload<\/h4>\n