The fruit fly Bactrocera dorsalis Hendel is a major constraint to mango production in Burkina Faso. The objective of this study was to evaluate the performance of two types of food substrates in optimizing the mass re...The fruit fly Bactrocera dorsalis Hendel is a major constraint to mango production in Burkina Faso. The objective of this study was to evaluate the performance of two types of food substrates in optimizing the mass rearing of B. dorsalis larvae. For this purpose, 200 eggs of B. dorsalis were divided into four batches of 50 eggs and incubated in Petri dishes containing the different food substrates (Diet 1 and Diet 2). This method was used to evaluate the rate and duration of egg hatching, as well as the development time of the different larval stages. In addition, 1200 pupae divided into four batches of 300 pupae, contained in PVC tubes, were placed inside the rearing cages to monitor the emergence of B. dorsalis. Ten pairs of B. dorsalis were placed in rearing cages and fed with Enzymatic Yeast Hydrolysate and sugar to evaluate the fecundity of female flies and the survival of both sexes. The developmental cycle length in Diet 1 and Diet 2 was 23.03 days and 23.24 days, respectively. Fecundity duration ranged from 57.75 ± 2.29 to 109.81 ± 3.81 days for females from Diet 1 and Diet 2, respectively. The pupal hatching rate varied significantly (P B. dorsalis, but the spawning index was 4 times higher with Diet 1. Most of the components of Diet 1 are available on the local market and are cheaper. Thus, we recommend the use of Diet 1 for B. dorsalis larvae mass rearing.展开更多
目的:基于QuEChERS方法结合气相色谱串联质谱(Gas Chromatography-Tandem Mass Spectrometry,GC-MS/MS)技术,建立一种简单、快速检测果蔬中农药残留的方法。方法:果蔬样品匀浆后,先用乙腈和乙酸缓冲盐包提取,再用m-PFC小柱净化,最后用GC...目的:基于QuEChERS方法结合气相色谱串联质谱(Gas Chromatography-Tandem Mass Spectrometry,GC-MS/MS)技术,建立一种简单、快速检测果蔬中农药残留的方法。方法:果蔬样品匀浆后,先用乙腈和乙酸缓冲盐包提取,再用m-PFC小柱净化,最后用GC-MS/MS测定,外标法定量。结果:13种农药在10~500μg·L^(-1)浓度范围内线性关系良好,相关系数(R^(2))均大于0.994,检出限为0.35~0.92μg·kg^(-1),定量限为1.0~2.8μg·kg^(-1);13种农药在3个水平下的加标回收率为82.4%~110.1%,相对标准偏差为2.9%~9.3%。结论:所建立的方法可操作性强,具有较高的精密度和准确度,可用于果蔬中农药残留的定性和定量检测。展开更多
目的:构建一种超高效液相色谱-串联质谱法(Ultra Performance Liquid Chromatography Tandem Mass Spectrometry,UPLC-MS/MS)同时测定水果中3种苯并咪唑类杀菌剂的方法。方法:试样匀浆后用1%甲酸-乙腈超声提取,提取液经乙二胺-N-丙基硅...目的:构建一种超高效液相色谱-串联质谱法(Ultra Performance Liquid Chromatography Tandem Mass Spectrometry,UPLC-MS/MS)同时测定水果中3种苯并咪唑类杀菌剂的方法。方法:试样匀浆后用1%甲酸-乙腈超声提取,提取液经乙二胺-N-丙基硅烷和无水硫酸镁净化,采用UPLC-MS/MS测定。结果:3种杀菌剂线性关系良好,相关系数R2均大于0.999,定量限在0.05~1.16μg·kg^(-1),选定3个浓度进行添加回收验证实验,回收率为87.1%~103.2%,相对标准偏差为1.4%~6.5%。结论:该方法简捷、准确,可满足水果中3种苯并咪唑杀菌剂的快速检测与确证分析要求。展开更多
文摘The fruit fly Bactrocera dorsalis Hendel is a major constraint to mango production in Burkina Faso. The objective of this study was to evaluate the performance of two types of food substrates in optimizing the mass rearing of B. dorsalis larvae. For this purpose, 200 eggs of B. dorsalis were divided into four batches of 50 eggs and incubated in Petri dishes containing the different food substrates (Diet 1 and Diet 2). This method was used to evaluate the rate and duration of egg hatching, as well as the development time of the different larval stages. In addition, 1200 pupae divided into four batches of 300 pupae, contained in PVC tubes, were placed inside the rearing cages to monitor the emergence of B. dorsalis. Ten pairs of B. dorsalis were placed in rearing cages and fed with Enzymatic Yeast Hydrolysate and sugar to evaluate the fecundity of female flies and the survival of both sexes. The developmental cycle length in Diet 1 and Diet 2 was 23.03 days and 23.24 days, respectively. Fecundity duration ranged from 57.75 ± 2.29 to 109.81 ± 3.81 days for females from Diet 1 and Diet 2, respectively. The pupal hatching rate varied significantly (P B. dorsalis, but the spawning index was 4 times higher with Diet 1. Most of the components of Diet 1 are available on the local market and are cheaper. Thus, we recommend the use of Diet 1 for B. dorsalis larvae mass rearing.
文摘目的:基于QuEChERS方法结合气相色谱串联质谱(Gas Chromatography-Tandem Mass Spectrometry,GC-MS/MS)技术,建立一种简单、快速检测果蔬中农药残留的方法。方法:果蔬样品匀浆后,先用乙腈和乙酸缓冲盐包提取,再用m-PFC小柱净化,最后用GC-MS/MS测定,外标法定量。结果:13种农药在10~500μg·L^(-1)浓度范围内线性关系良好,相关系数(R^(2))均大于0.994,检出限为0.35~0.92μg·kg^(-1),定量限为1.0~2.8μg·kg^(-1);13种农药在3个水平下的加标回收率为82.4%~110.1%,相对标准偏差为2.9%~9.3%。结论:所建立的方法可操作性强,具有较高的精密度和准确度,可用于果蔬中农药残留的定性和定量检测。
文摘目的:构建一种超高效液相色谱-串联质谱法(Ultra Performance Liquid Chromatography Tandem Mass Spectrometry,UPLC-MS/MS)同时测定水果中3种苯并咪唑类杀菌剂的方法。方法:试样匀浆后用1%甲酸-乙腈超声提取,提取液经乙二胺-N-丙基硅烷和无水硫酸镁净化,采用UPLC-MS/MS测定。结果:3种杀菌剂线性关系良好,相关系数R2均大于0.999,定量限在0.05~1.16μg·kg^(-1),选定3个浓度进行添加回收验证实验,回收率为87.1%~103.2%,相对标准偏差为1.4%~6.5%。结论:该方法简捷、准确,可满足水果中3种苯并咪唑杀菌剂的快速检测与确证分析要求。
