Sublethal Effects of Spinosad on some Biochemical Parameters of Xanthogaleruca luteola (Müller) (Coleoptera: Chrysomelidae)
2014
Mohammadzadeh Tamam, B., University of Guilan, Rasht (Iran). Dept. of Plant Protection | Ghadamyari, M., University of Guilan, Rasht (Iran). Dept. of Plant Protection | Sahragard, A., University of Guilan, Rasht (Iran). Dept. of Plant Protection | Karimi-Malati, A., University of Guilan, Rasht (Iran). Dept. of Plant Protection
The effect of spinosad on some biochemical characteristics of Xanthogaleruca luteola was investigated. LC30 and LC50 of spinosad for the third instar larvae were determined as 1.6 and 2.9 ppm, respectively. Biochemical tests were carried out on the 3rd instar larvae treated with LC30 and LC50 of spinosad. The LC30 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 LC50 concentration. Available energy of the larvae exposed to LC30 of spinosad increased significantly, whereas it decreased significantly at LC50. However, the energy consumed was increased at both concentrations significantly. Cellular energy allocation of larvae treated with LC50 concentrations of spinosad decreased significantly. Glutathione-S-transferase and esterase activities were increased significantly at LC50. However, lipase activity was decreased at both concentrations.
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