Abstract
The effect of spinosad on some biochemical characteristics of Xanthogaleruca luteola was investigated. LC<sub>30</sub> and LC<sub>50 </sub>of spinosad for the third instar larvae were determined as 1.6 and 2.9 ppm, respectively. Biochemical tests were carried out on the 3<sup>rd</sup> instar larvae treated with LC<sub>30</sub> and LC<sub>50</sub> of spinosad. The LC<sub>30</sub> concentration decreased carbohydrate and glycogen content and increased lipid content significantly. There was a significant decrease in carbohydrate, glycogen, and protein contents following the exposure to LC<sub>50</sub> concentration. Available energy of the larvae exposed to LC<sub>30</sub> of spinosad increased significantly, whereas it decreased significantly at LC<sub>50</sub>. However, the energy consumed was increased at both concentrations significantly. Cellular energy allocation of larvae treated with LC<sub>50</sub> concentrations of spinosad decreased significantly. Glutathione-S-transferase and esterase activities were increased significantly at LC<sub>50</sub>. However, lipase activity was decreased at both concentrations. &nbsp;
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