author(s)
Syed Ishtiaq Anjum, Hikmat Ullah Khan and Shahid Ullah Khan, Ayesha Haleem Shah and Abdul Haleem Shah

abstract
Methanol extracts from medicinal plant Elaeagnus angustifolia were used against rice weevil (Sitophilus oryzae) Survival was significantly inhibited when adults of S. oryzae were exposed to the extracts incorporated with no diet. The doses were 1ml, 1.5ml, 2.0ml, 2.5ml and 3ml while the mortality rates were 24, 33.5, 47, 54 and 62 respectively. The highest mortality rates were observed with the dose of 3ml. Thus, significant mortality rate was achieved with extract of these plants. These naturally occurring plant extracts could be useful for managing populations of S. oryzae. The leaves were dried powdered and extracted by methanol. The plant extract were used to investigate toxicological effect. The applied concentration were 1%, 1.5%, 2%, 2.5% and 3% and their mortality rate was 24, 62, 47, 54 and 33.5 respectively. Experimental extracts were applied on adult rice weevil and average mortality rate were observed after 12 h. In adults bioassay the highest toxicity was recorded for extract (LC₅₀ =50%).The mortality revealed that Elaeagnus angustifolia has Significant toxic properties on Sitophilus oryzae. As this plant is widely distributed and can be used for further investigation also.