DHF (dengue hemorrhagic fever), is one of the acute infectious diseases to public health problems who live tropical areas, including in Indonesia. The spread of the disease caused by mosquito vectors. One of these a Aedes aegypti mosquito. Many ways have been done to eradicate mosquitoes, both chemical and biological. Aceh is one of the largest patchouli (Pogostemon cablin Benth.) oil producers in Indonesia (about 90%). So a lot of distillates waste of patchouli. therefore the idea to make biological larvacide by utilizing patchouli leaf dregs. described in this book about how to manufacture leaf dregs Pogostemon cablin Benth extract and treatment procedures as a larvacide. It is hoped this book can help students and researchers who wanted to do research on biological larvacide.