Several plants used in folk medicine has bioactivity that depends on dosage.Chenopodium ambrosioides is a plant with anti-helmintic and insecticide activities.The objective of this work was to observe effects of C.ambrosioides on life span Optical Speed Sensor and reproduction of a model-organism, Drosophila melanogaster.Larval and adults were fed on two kinds of medium: a standard nourishing medium and standard nourishing medium with 0,1 % of aqueos extract of C.
ambrosioides.The flies reared on medium with plant extract had Accessories - Readers less offspring and significative difference in sex ratio.The life span of both sex were affected by the plant aqueuos extract: females seems to die early than males.Larval phase survivor females reared on medium with extract had a longer life span, which can be attributable to shorter life span of males reared on medium with plant extract.