Developing an in-house colorimetric method for detecting organophosphate and carbamate residue using cricket cholinesterase

Chemical and Biological Technologies in Agriculture

Table 1 ChE activity in different body regions in three cricket species

Body region	ChE activities (Mean ± SD)
Body region	Oriental ground cricket (units/mL)	African cricket (units/mL)	House cricket (units/mL)
Head	3.40 ± 0.37^a	3.17 ± 0.17^a	7.76 ± 0.35^a
Thorax	4.87 ± 0.22^b	2.88 ± 0.22^a,b	5.31 ± 0.27^b
Abdomen	5.27 ± 0.33^b	2.23 ± 0.33^b	6.08 ± 0.49^a,b
Whole body	2.97 ± 0.17^a	2.98 ± 0.64^a	11.97 ± 0.53^c

Mean within columns followed by the same letter are not significantly different (P > 0.05; One-Way ANOVA; post Hoc Benfferoni Multiple Comparisons)
Note: In the table, it was indicated that there were not significantly different cholinesterase levels in several samples, including the head and the whole body of oriental ground cricket, the head, the thorax, and the whole body of African cricket, and the head and abdomen of the house cricket, as shown in the same letter (a). Following the letter (b), the thorax and abdomen of all crickets were not significantly different. However, the whole body of the house cricket showed a higher cholinesterase level than the others, as shown in the letter (c)
ChE Cholinesterase
^aIndicated that there were not significantly different cholinesterase levels in several samples, including the head and the whole body of oriental ground cricket, the head, the thorax, and the whole body of African cricket, and the head and abdomen of the house cricket
^b The thorax and abdomen of all crickets were not significantly different
^c The whole body of the house cricket showed a higher cholinesterase level than the others