【摘 要】
：
The effective analytical method of pyridaben and clothianidin in cucumber was developed,and dissipation of those two pesticides under field condition was investigated.The samples were extracted with a
【机 构】
：
College of Science,China Agrucultural University,Beijing 100193,China;State Key Lavoratory of Integr
【出 处】
：
第五届农药与环境安全国际学术研讨会暨第四届植保机械与施药技术国际研讨会( 5th International Sympo
论文部分内容阅读
The effective analytical method of pyridaben and clothianidin in cucumber was developed,and dissipation of those two pesticides under field condition was investigated.The samples were extracted with acetonitrile by ultrasound-assisted method,purified by Florisil SPE column with eluants of different polarity.Pyridaben and clothianidin were determined by gas chromatography with electron capture detector and ultra high performance liquid chromatography with ultraviolet detector,respectively.The average recoveries fortified at levels of 0.01~2.0 mg kg-1 ranged from 87~105%,with relative standard deviations(RSD)of 1.0~3.1%.The limits of quantification(LOQs)were 0.01 mg kg-1.The linearity was acceptable in the range of 0.005~1.0 mg L-1 and 0.02~5.0 mg L-1 for pyridaben and clothianidin.The results showed that pyridaben exhibited half-lives(T1/2)of 1.7-2.2 d in cucumber,and 2.9-4.3 d for clothianidin,from Beijing and Anhui,respectively.
其他文献
Spring continually is the working way of traditional orchard spring machine.Large gap exist in small orchard trees and the trees are sparse.Spring in the gap not only waste of pesticide,but also pollu
In order to improve the automatic working performance of orchard sprayer,an automatically variable-rate orchard sprayer based on LIDAR(Light Detection and Ranging)was developed.The high-precision scan
Peptide pesticide has been widely studied because of its safety and low toxicity.With the application of peptide,its promoting effects to plants have been reported[1].These studies provide a possibili
Non-uniformity of Pesticide spray deposition and drift was the main factors of phytotoxicity and environmental pollution during the pesticide application process.Scientific and efficient pesticide spr
The pesticides containing pyrimidine are known as one of the most important classes of agrochemicals with broad fungicidal,insecticidal and acaricidal spectrum,lower toxicity towards mammalian cells a
In order to investigate the biological activity of novel bi-heterocyclic compounds,a series of N-(3,5-disubstituted-1H-pyrazol-4-yl)-4-methyl-1,2,3-thiadiazole-5-carboxamides with different alkyl grou
Insecticides are one of main tools to protect crops from the damage of pests in agriculture.and also bring several negative effects on the environment.Thus,there is an on-going need for the discovery
Effective control of insect pests and plant disease often depends on several complementary approaches that combine to form an integrated pest management strategy.Recent efforts to find new pesticides
To discover novel eco-friendly compounds with good activity for aphid control,(E)-β-farnesene(EβF),the main component of aphid alarm pheromone,was chosen as the lead compound.By introducing of 2-Nitro
Chemical communication plays a pre-eminent role in insect reproduction.This is especially so in the case of moths,where mate finding and mate recognition rely on volatile sex pheromone.Males respond t