INSECTICIDAL ACTIVITY OF ROCKET SEEDS EURCA SATIVA EXTRACTS AGAINST SOME STORED GRAIN INSECTS AND ITS RESIDUAL EFFECT DURING STORAGE

Abstract

The present work concerned the effect of plant extracts, seeds of Rocket Eurca sativa in three solvents, hexane, acetone and methanol on three imported stored grain insects, adults of Rhizopertha dominica and Tribolium castaneum and Trogoderma granarium. All experiments carried out under laboratory conditions of 30±2 and 65±5 R.H. to calculate the percentage of mortality and reduction of F-1progeny for the three insects. Data was calculated after 1,3,5,7,14 and 21 days from treatment, hexane extract has the most mortality effect on the three insects, the mortality percentage ranged 30-100% with 0.25%-2% concentrations on R. dominica with reduction in F-1progney ranged 77.78-100%. For T.castanium mortality values were in range 10.43±2 -77.9±9.29% and the reduction in F1-progeny ranged 64-100%. Mortality percentage ranged 10.22±1.52-100% for T. grnarium with 100% reduction in F1-progeny at 2% conc. While the other concentrations merely proved changes in the sex ratio. The residual effects of the tested planet hexane extracts was experimented to evaluate their efficiency during storage. Throughout six months, the toxic of the Eruca sativa hexane extract was tested every two weeks.