Plant diseases and pests.

Abstract

[Objectives] The paper was to explore enzyme inhibition rale method for rapid detection of organophosphorus and carbamate pesticides in cowpea. [ Methods] Acetylcholinesterase (AChE) was added to cowpea extract, to determine the inhibition rate of extract agairuJt enzyme. The influences of different sampling methods and sampling parts on detection results were compared. [Results] The positive rate of standard sampling was 18. 18% higher than that of non-standard sampling, and the positive rate of samples collected from cowpea tail was 16.67% higher than that collected from other parts. [Conclusions] Enzyme inhibition rate method is suitable for rapid detection of organophosphorus and carbamate pesticides in cowpea.