The Effect of Some plant Extracts on death of the barnacle larvae Balanus amphitrite amphitrite Darwin, 1854 (Cirripedia: Crustacea)

Abstract

The effect of some hot water and organic solvent plant extracts of Ziziphus mauritiana , Eucalptus camaldulensis and Ouercus sp. in death of the barnacle larvae was studied for the period from July to September It has gathered many samples of the barnacle larvae from water uptake of Al-Najebiah electricity station, in Basrah city, larvae averaged 10 was used at replicates in the control group and the series of biological control experiments. the results revealed that the hot water extracts had a fatal effect on barnacle’s larvae. The oak peel extract gave a high rate of mortality of 100% larvae within four hours of exposure at a concentration of 2 mg / ml. and the laboratory treatment of barnacles larvae with the organic solvents (ethanol, acetate ethyl and hexane) of the plant extracts of lotus, eucalyptus and cobalt plant oak (peat) separately, showed the efficiency of alcoholic and ethyl acetate extracts of eucalyptus in killing larvae of barnacles, as 100% larvae were killed by using concentration of 0.1 mg / ml within 24 hours.