Insects are the most widespread of all animals. Some insects are friends of human but great majority are harmful to man simply because they destroy crops and spread diseases. Houseflies for one are harmful to human health as they are good agents of bacteria, germs and other dirt causing diseases. In dealing with these insects, insecticides are use, Unfortunately, most insecticides for houseflies are synthetics though some are water based, but stillharmful to the environment. Lantana camara Linn. or familiarly called as Kantutay have lantadene which is a chemical toxic to the liver of animals and can cause various symptoms if ingested. It also contained lantanine and other phytochemicals which made it a viable source of pharmaceutical drugs.Its various parts such as the leaves, flowers and fruits were subjected to extraction process and thetoxicity of each part was tested against houseflies (Musca domestica L.)by topical and spray method using Peet-Grady Test. The toxicity effects of the extractsin eradicatingMusca domesticaL.in its varying developmental stages from egg to maggots and finally to pupa was compared statistically byTwo-way Analysis of Variance.
