Laboratory evaluation of four types of biochar to manage some stored product insects

Abstract Four types of biochars were prepared from rice husk as farm waste, sugarcane bagasse sugar cane juice store residues Leucaena leucocephala tree horticulture waste and chicken manure reduce at 700 ο C, then evaluated a alternative to control Tribolium castaneum , Rhyzopertha dominica Oryzaephlius surinamensis Sitophilus oryzae . The character each type has been defined using Scanning Electron Microscopy (SEM) with an Energy Dispersive X-Ray Analysis (EDX) Fourier transform infrared spectroscopy (FTIR) used identify the elemental composition functional groups distributed on surface. compositions refer biochar exhibited decrease in Carbon concentration increase Oxygen content; there is negative correlation between C O contents. On other hand, only tested that contains Ca, P, Cl. largest number its surface, mortality insects was recorded after 10 days which showed most effective more different elements affected O.surinamensis R. percentages 86.66 73.33. Smaller particles than larger against both R smaller (1.80—0.94 µm) LC 50 1.29 0.56 g/kg O. surinamensis. SEM images for adhesion insect’s body parts, also, sensilla disappeared result friction insect cuticle. Our results may indicate promising features method some stored product considering source affect Biochar had efficacy depending upon moisture contents, increased toxicity decreased.