The present work aimed to evaluate the relative toxicological safety of certain non-conventional insecticides, i.e. imidacloprid, neem oil, mineral oil and a commercial product of the entomopathogenic fungi, Beauvaria bassiana (all compared to chlorpyrifos and cypermethrin). In this respect, acute and subchronic studies on Japanese quail, Coturnix coturnix japonica and Bolti fish, Tilapia nilotica were conducted. This book is useful to all stakeholders of plant protection. All concerned researchers, scientific community, institutions and NGOs.