Efficiency of Crude Extract from Glinus oppositifolius (L.) A.DC. on Sitophilus oryzae L

Abstract

The rice weevil (Sitophilus oryzae L.) is an important pest of stored products especially in cereal
grains and their products. The aim of this present study was to evaluate the hexane extract of Glinus
oppositifolius (L.) A.DC. for its insecticidal effect against adult S. oryzae. Various concentrations viz., 0, 250,
500, 750 and 1,000 mg/L were applied using impregnated filter paper test. The percent mortality was
recorded at 24, 36 and 48 hours after treatment. The results revealed G. oppositifolius crude extract at
concentration of 1,000 mg/L provided to be the most effective and displayed 98.35 ± 3.31 % mortality after
48 hours of exposure. Herein, this plant extract exhibited LC50 of the treated beetles in 24, 36 and 48 hours
of 1202.76, 839.71 and 196.45 mg/L. No mortality of the beetles was observed in any of the untreated
groups. For all treatments, insecticidal property increased in dose dependent manner. As a result, it might
be suggested that this tested plant could be incorporated in IPM programs for the effective control of S.
oryzae.