[Objectives ] The paper was to explore enzyme inhibition rate method for rapid detection of organophosphorus and carbamate pesticides in cowpea. [ Methods ] Acetylcholinesterase （ACHE） was added to cowpea extract, t...[Objectives ] The paper was to explore enzyme inhibition rate 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 against enzyme. The influences of different sampiing methods and sampling parts on detection results were compared. [ Results] The positive rate of standard sampling was 18.18% higher than that of non-stand- ard sampling, and the positive rate of samples collected from cowpea tail was 16.67% higher than that collected from other parts. [ Condmions] Enzyme inhibi- tion rate method is suitable for rapid detection of organophosphorus and carbamate pesticides in cowpea.展开更多
[ Objectives ] The paper investigated the occurrence and damage of thrips on winter vegetable cowpea in Sanya City, to summarize prediction method and control measures against the insect pest. [ Methods] Prediction th...[ Objectives ] The paper investigated the occurrence and damage of thrips on winter vegetable cowpea in Sanya City, to summarize prediction method and control measures against the insect pest. [ Methods] Prediction through analogy suggested that cowpea could be damaged by thrips throughout the entire growth period. [Results] The peak occurrence and damage period of thrips was after transplanting of cowpea from December to early March in the following year. The occurrence of thrips was severe in the case of high temperature and drought, or was light when encountering rainy season. [ Conclusions ] Using fivepoint sampling method, blue boards were hanged up for monitoring （five pieces each point, specifieation 25 cm × 30 cm）. When the number of thrips on blue board reached 10 specimen/piece, it was the optimal control period of thrips, and different prevention and control measures could be adopted according to the specifi growth stages of cowpea.展开更多
文摘[Objectives ] The paper was to explore enzyme inhibition rate 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 against enzyme. The influences of different sampiing methods and sampling parts on detection results were compared. [ Results] The positive rate of standard sampling was 18.18% higher than that of non-stand- ard sampling, and the positive rate of samples collected from cowpea tail was 16.67% higher than that collected from other parts. [ Condmions] Enzyme inhibi- tion rate method is suitable for rapid detection of organophosphorus and carbamate pesticides in cowpea.
文摘[ Objectives ] The paper investigated the occurrence and damage of thrips on winter vegetable cowpea in Sanya City, to summarize prediction method and control measures against the insect pest. [ Methods] Prediction through analogy suggested that cowpea could be damaged by thrips throughout the entire growth period. [Results] The peak occurrence and damage period of thrips was after transplanting of cowpea from December to early March in the following year. The occurrence of thrips was severe in the case of high temperature and drought, or was light when encountering rainy season. [ Conclusions ] Using fivepoint sampling method, blue boards were hanged up for monitoring （five pieces each point, specifieation 25 cm × 30 cm）. When the number of thrips on blue board reached 10 specimen/piece, it was the optimal control period of thrips, and different prevention and control measures could be adopted according to the specifi growth stages of cowpea.
