FIG. 149 Ethmoid bone from above. The ethmoid bone is exceedingly light and spongy, and cubical in shape; it is situated at the anterior part of the base of the cranium, between the two orbits, at the roof of the nose, and contributes to each of these cavities.IG. 151 Ethmoid bone from behind. FIG. 152 Ethmoid bone from the right side. FIG. 153 Lateral wall of nasal cavity, showing ethmoid bone in position. In front of the lamina papyracea are some broken air cells which are overlapped and completed by the lacrimal bone and the frontal process of the maxilla.
Spinosad is a natural substance made by a soil bacterium that can be toxic to insects. It is a mixture of two chemicals called spinosyn A and spinosyn D. It is used to control a wide variety of pests.These include thrips, leafminers, spider mites, mosquitoes, ants, fruit flies and others.pinosad is also found in some drugs regulated by the US Food and Drug Administration. These products are used to control head lice on people and fleas on dogs and cats.
Spinosad is a broad-spectrum, organic insecticide. The term broad-spectrum means that it is toxic to a wide variety of insects. It is, however, relatively non-toxic to mammals and beneficial insects. If used carefully only insects that actually eat something that has been treated, such as a leaf, are affected.