期刊文献+
共找到22,425篇文章
< 1 2 250 >
每页显示 20 50 100
Correction:Making the Complicated Simple:A Minimizing Carrier Strategy on Innovative Nanopesticides
1
作者 Wenjie Shangguan Qiliang Huang +6 位作者 Huiping Chen Yingying Zheng Pengyue Zhao Chong Cao Manli Yu Yongsong Cao Lidong Cao 《Nano-Micro Letters》 SCIE EI CAS CSCD 2024年第11期174-176,共3页
The Nano-Micro Letters(2024)16:193,article by Shangguan et al.,entitled“Making the Complicated Simple:A Minimizing Carrier Strategy on Innovative Nanopesticides”(Nano-Micro Lett.https://doi.org/10.1007/s40820-024-01... The Nano-Micro Letters(2024)16:193,article by Shangguan et al.,entitled“Making the Complicated Simple:A Minimizing Carrier Strategy on Innovative Nanopesticides”(Nano-Micro Lett.https://doi.org/10.1007/s40820-024-01413-5),was published online on 14 May,2024,with errors.The structural formulas and captions of the three acyl chlorides in Fig.3A were wrong.They should be as shown below. 展开更多
关键词 pesticideS FORMULAS structural
下载PDF
Screening and pilot-scale evaluation of a highly efficient pesticide-degrading Pseudomonas sp.strain BL5
2
作者 Rui Chen Xinyu Zuo +6 位作者 He Bai Ruolin Qin Zhiguo Chen Yiyun Liu Wenqing Cao Jingpeng Song Xiaoqiang Jia 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2024年第10期287-294,共8页
The widespread use of pesticides has caused serious harm to ecosystems,necessitating effective and environmentally friendly treatment methods.Bioremediation stands out as a promising approach for pollutant treatment,w... The widespread use of pesticides has caused serious harm to ecosystems,necessitating effective and environmentally friendly treatment methods.Bioremediation stands out as a promising approach for pollutant treatment,wherein the metabolic activities of microorganisms can transform toxic pesticides into compounds with lower or no toxicity.In this study,we obtained eight pesticide-degrading strains from pesticide-contaminated sites through continuous enrichment and screening.Four highly efficient pesticide-degrading strains(degradation ratios exceeding 80%)were identified.Among them,Pseudomonas sp.BL5 exhibited the strongest growth(exceeding 10^(9) CFU·ml^(-1))and outstanding degradation of benzene derivatives and chlorinated hydrocarbons at both laboratory and pilot scales,with degradation ratios exceeding 98%and 99.6%,respectively.This research provides new tools and insights for the bioremediation of pesticide-related pollutants. 展开更多
关键词 pesticideS PILOT-SCALE Degradation REMEDIATION Pseudomonas sp. BENZENE
下载PDF
Association of hypertension and plant-based dietary patterns on cognitive impairment: a nationwide cohort study in China
3
作者 Fang Liang Jialin Fu +5 位作者 Gabrielle Turner-McGrievy Yechuang Wang Kai Ding Jing Zeng Justin B Moore Rui Li 《Food Science and Human Wellness》 SCIE CAS CSCD 2024年第6期3544-3552,共9页
This study investigated the association of hypertension with cognitive impairment and determined whether better adherence to plant-based diet(PBD)patterns may modify the association.We analyzed 4485 elderly individual... This study investigated the association of hypertension with cognitive impairment and determined whether better adherence to plant-based diet(PBD)patterns may modify the association.We analyzed 4485 elderly individuals with normal cognition at baseline from the Chinese Longitudinal Healthy Longevity Survey(2011−2018).Cognitive function was assessed by the Mini-mental State Examination(MMSE),and cognitive impairment was defined as an MMSE score below 18 points.Diet patterns were assessed using the overall plant-based diet index(PDI),healthful plant-based diet index(hPDI),and unhealthful plant-based diet index(uPDI)derived from a simplified food frequency questionnaire(FFQ).Blood pressure was measured through physical examination.Cox proportional hazard regression and restricted cubic spline were performed.Participants with hypertension had an increased risk of cognitive impairment compared with normal group.The associations between hypertension and cognitive impairment were more pronounced among participants with lower PDI than those with higher PDI,among participants with lower hPDI than those with higher hPDI,and among participants with higher uPDI than those with lower uPDI.A healthful PBD pattern may attenuate hypertension-induced cognitive impairment,while an unhealthful PBD pattern may exacerbate hypertensioninduced cognitive impairment in elderly.Adherence to healthful PBD pattern could be used to prevent or mitigate adverse neurological effects in the hypertensive population. 展开更多
关键词 Cognitive impairment HYPERTENSION plant-based dietary pattern Chinese older adults COHORT
下载PDF
The meat of the matter: plant-based meat analogue versus traditional meat product nutritional quality
4
作者 Arshia Shireen Amanda J.Wright 《Food Science and Human Wellness》 SCIE CAS CSCD 2024年第6期3110-3125,共16页
Plant-based meat analogues(PBMA)are formulated to mimic the sensory characteristics of traditional meat products(TMP)using vegetarian ingredients and are increasingly popular with the trend towards plantbased diets,ev... Plant-based meat analogues(PBMA)are formulated to mimic the sensory characteristics of traditional meat products(TMP)using vegetarian ingredients and are increasingly popular with the trend towards plantbased diets,even among meat-eating consumers.This narrative review compared the nutritional quality of PBMA and TMP to broaden the discussion on the suitability of simulated meat products to substitute TMP,while exploring other attributes for their comparison.The complexity of PBMA and TMP means they are not entirely interchangeable.Importantly,PBMA health effects extend beyond their basic nutrient content and quality.Postprandial metabolism and satiety,for example,can be affected by product formulation,ingredient interactions,and thermomechanical processing involved in producing organoleptically acceptable PBMA.There are specific opportunities for low-sodium PBMA products to contribute to a healthy shift toward plantbased diets.In conclusion,PBMA cannot be assumed to be healthier than TMP.They should be designed with comprehensive consideration of composition and processing to ensure they support consumers who are adopting plant-based diets in realizing the theoretical health benefits. 展开更多
关键词 plant-based meat analogue Meat alternative Plant protein Nutritional quality Processed foods
下载PDF
The Role of Abdominal CT in the Assessment of the Effectiveness of Gastric Lavage after Pesticide Poisoning
5
作者 Minghui Gong Zhengdong Wan 《Journal of Biosciences and Medicines》 2024年第5期293-299,共7页
Pesticide poisoning is one of the most common diseases in the emergency department, characterized by rapid changes in condition, a high misdiagnosis rate, and a poor prognosis. Measures for early removal of poisons ar... Pesticide poisoning is one of the most common diseases in the emergency department, characterized by rapid changes in condition, a high misdiagnosis rate, and a poor prognosis. Measures for early removal of poisons are crucial, and gastric lavage is one of the important measures. Regarding the post-gastric lavage effect, abdominal CT scanning has an important application value in the assessment of the gastric lavage effect after pesticide poisoning. 展开更多
关键词 Abdominal CT Gastric Lavage pesticide Poisoning ASSESSMENT
下载PDF
On-site rapid detection of multiple pesticide residues in tea leaves by lateral flow immunoassay
6
作者 Junxia Gao Tianyi Zhang +7 位作者 Yihua Fang Ying Zhao Mei Yang Li Zhao Ye Li Jun Huang Guonian Zhu Yirong Guo 《Journal of Pharmaceutical Analysis》 SCIE CAS CSCD 2024年第2期276-283,共8页
The application of pesticides (mostly insecticides and fungicides) during the tea-planting process will undoubtedly increase the dietary risk associated with drinking tea. Thus, it is necessary to ascertain whether pe... The application of pesticides (mostly insecticides and fungicides) during the tea-planting process will undoubtedly increase the dietary risk associated with drinking tea. Thus, it is necessary to ascertain whether pesticide residues in tea products exceed the maximum residue limits. However, the complex matrices present in tea samples comprise a major challenge in the analytical detection of pesticide residues. In this study, nine types of lateral flow immunochromatographic strips (LFICSs) were developed to detect the pesticides of interest (fenpropathrin, chlorpyrifos, imidacloprid, thiamethoxam, acetamiprid, carbendazim, chlorothalonil, pyraclostrobin, and iprodione). To reduce the interference of tea substrates on the assay sensitivity, the pretreatment conditions for tea samples, including the extraction solvent, extraction time, and purification agent, were optimized for the simultaneous detection of these pesticides. The entire testing procedure (including pretreatment and detection) could be completed within 30 min. The detected results of authentic tea samples were confirmed by ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS), which suggest that the LFICS coupled with sample rapid pretreatment can be used for on-site rapid screening of the target pesticide in tea products prior to their market release. 展开更多
关键词 Lateral flow immunoassay Rapid detection pesticide multi-residue Tea matrix Sample rapid pretreatment
下载PDF
Evaluation of Agricultural Contamination Level by Heavy Metals and Pesticides in Sediments of Rivers and Water Bodies for Shrimp Fishing in the Lower Ouémé: Case of the Aguigadji, Ahlan and Sele Stations in Benin
7
作者 Souradjou Orou Goura Fadéby Modeste Gouissi +3 位作者 Armelle Sabine Yélignan Hounkpatin Wakili Bolatito Yessoufou Tayéwo Sylvain Biaou Nonvignon Martial Fassinou 《Advances in Materials Physics and Chemistry》 CAS 2024年第2期25-46,共22页
This study assessed sediment contamination by heavy metals and pesticide active ingredients linked to chemical inputs used in agricultural activities in the lower Ouémé. Pesticide residues from the organochl... This study assessed sediment contamination by heavy metals and pesticide active ingredients linked to chemical inputs used in agricultural activities in the lower Ouémé. Pesticide residues from the organochlorine, pyrethroid and organophosphorus families were investigated by gas chromatography, and heavy metals (Cd, Pb, As, Ni, Zn, Fe, Mg, Cr and Hg) by atomic absorption spectrophotometry. The metallic pollution indices, the contamination factor (CF) and the ecological risk index were calculated. The results revealed 8 active ingredients in the rainy season and 9 in the dry season. Glyphosate was the active ingredient with the highest concentration at all stations, 9.65 ± 0.84 mg/kg recorded in the dry season at the Aguigadji station. All glyphosate values were above the EQS. DDT, Atrazine and Endosulfan also showed high concentrations in the dry and rainy seasons. Emamectin, Abamectin and Lambda Cyhalothrin also showed high concentrations in the dry season at Aguigadji, Ahlan and Sele. Only glyphosate was recorded at the control station (Toho), but in very low concentrations. Lead showed the highest concentrations at all the stations, 265.96 ± 21.02 mg/Kg in the rainy season and 255.38 ± 79.09 mg/Kg in the dry season, all detected at the Aguigadji station and above the EQS. Zn, Ni, Fe, Cu and Cr were all representative in both the dry and rainy seasons at the contaminated stations. Manganese showed high concentrations in the rainy season. Pb showed very high contamination (FC ≥ 6) at the Aguigadji and Ahlan stations and significant contamination (3 ≤ FC 6) at the Sele station in both the rainy and dry seasons. Ni, Hg and Cd, showed either moderate or significant contamination at the contaminated stations. The risk values showed a considerable ecological Ri (190 ≤ Ri < 380) in the rainy season and a moderate ecological Ri (95 ≤ Ri < 190) in the dry season at these contaminated stations. 展开更多
关键词 pesticideS Heavy Metals SEDIMENTS Shrimp Fishing Area Lower Ouémé
下载PDF
Coordination of distinctive pesticide adjuvants and atomization nozzles on droplet spectrum evolution for spatial drift reduction
8
作者 Shidong Xue Jingkun Han +3 位作者 Xi Xi Zhong Lan Rongfu Wen Xuehu Ma 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2024年第2期250-262,共13页
Pesticide adjuvants,as crop protection products,have been widely used to reduce drift loss and improve utilization efficiency by regulating droplet spectrum.However,the coordinated regulation mechanisms of adjuvants a... Pesticide adjuvants,as crop protection products,have been widely used to reduce drift loss and improve utilization efficiency by regulating droplet spectrum.However,the coordinated regulation mechanisms of adjuvants and nozzles on droplet spectrum remain unclear.Here,we established the relationship between droplet spectrum evolution and liquid atomization by investigating the typical characteristics of droplet diameter distribution near the nozzle.Based on this,the regulation mechanisms of distinctive pesticide adjuvants on droplet spectrum were clarified,and the corresponding drift reduction performances were quantitively evaluated by wind tunnel experiments.It shows that the droplet diameter firstly shifts to the smaller due to the liquid sheet breakup and then prefers to increase caused by droplet interactions.Reducing the surface tension of sprayed liquid facilitates the uniform liquid breakup and increasing the viscosity inhibits the liquid deformation,which prolong the atomization process and effectively improve the droplet spectrum.As a result,the drift losses of flat-fan and hollow cone nozzles are reduced by about 50%after adding organosilicon and vegetable oil adjuvants.By contrast,the air induction nozzle shows a superior anti-drift ability,regardless of distinctive adjuvants.Our findings provide insights into rational adjuvant design and nozzle selection in the field application. 展开更多
关键词 pesticide drift Spray droplets Particle size distribution Spray atomization Transport processes ADJUVANTS
下载PDF
Resistance Monitoring of Field Populations of Panonychus citri to Three Pesticides
9
作者 Yang HAN Tingmi YANG 《Plant Diseases and Pests》 2024年第2期4-8,共5页
[Objectives]The paper was to investigate the development of Panonychus citri resistance to commonly used pesticides in major citrus producing areas in China,and to screen out new green and efficient agents for its con... [Objectives]The paper was to investigate the development of Panonychus citri resistance to commonly used pesticides in major citrus producing areas in China,and to screen out new green and efficient agents for its control and prevention.[Methods]The resistance changes of field populations of P.citri to abamectin,pyridaben,and bifenazate in 12 locations across five provinces in China were compared using the leaf disc impregnation method.[Results]P.citri in the tested areas exhibited the most severe resistance to abamectin,with approximately 91.7%of the field populations showing high levels of resistance to abamectin(112.1-560.5 times);50%of P.citri populations exhibited high levels of resistance to pyridaben(123.0-202.7 times),while the remaining populations showed intermediate levels of resistance(25.6-80.3 times);except for the Zhejiang Xiangshan 2019 and Jiangxi Yudu 2019 populations,which exhibited a medium level of resistance to bifenazate,the remaining 10 monitored populations demonstrated a high level of resistance to bifenazate(140.4-686.1 times).[Conclusions]It is advisable to discontinue the use of abamectin and bifenazate due to significant resistance observed in populations of P.citri monitored in 12 locations across 5 provinces.It is recommended to reduce the frequency of pyridaben use and alternate with other acaricides that have different mechanisms of action due to the varying degrees of resistance developed. 展开更多
关键词 Panonychus citri RESISTANCE pesticide Biological activity
下载PDF
Research Progress of QuEChERS Pretreatment Technique in the Detection of Multiple Pesticide Residues
10
作者 Bo LIU Dawei WANG +3 位作者 Yuhang GUO Xuehua WANG Lei WANG Yajuan SONG 《Agricultural Biotechnology》 2024年第2期10-11,37,共3页
The QuEChERS extraction technique is a pretreatment technique that has been rapidly applied in recent years and is widely used in the field of pesticide residues with many advantages. This technique is based on solid ... The QuEChERS extraction technique is a pretreatment technique that has been rapidly applied in recent years and is widely used in the field of pesticide residues with many advantages. This technique is based on solid phase extraction (SPE), which uses the interaction between adsorbent and impurities in the matrix to achieve the purpose of purification. The method has easier operation and better purification effect than SPE. In this paper, the research progress of the QuEChERS technique in pesticide residue detection in different fields in recent years and its future development were reviewed, hoping to provide reference for further development and utilization of the QuEChERS technique in pesticide residue detection in the future. 展开更多
关键词 QUECHERS PRETREATMENT pesticide residues Research progress
下载PDF
Sensitivity of Commercial Enzyme Inhibition Colorimetric Pesticide Residue Rapid Test Kit to a Variety of Pesticides
11
作者 Junxia LUO Qianqian ZHAO +4 位作者 Lumei DUAN Yanzhen LI Huifang QIAO Zhipei DOU Jianbo ZHAO 《Asian Agricultural Research》 2024年第5期29-32,共4页
[Objectives]To fully understand the quality of commercial enzyme inhibition-colorimetric pesticide residue rapid detection kits,so that they can play a greater role in the detection and supervision of agricultural pro... [Objectives]To fully understand the quality of commercial enzyme inhibition-colorimetric pesticide residue rapid detection kits,so that they can play a greater role in the detection and supervision of agricultural products.[Methods]The sensitivity of 28 kinds of pesticides was determined by using the commercially available enzyme inhibition colorimetric rapid detection kit with Hendu brand.[Results]There was a significant difference in the sensitivity of the kit to each pesticide,and the kit was more sensitive to dichlorvos among the 28 pesticides tested.The sensitivity to methyl isosalifos,dimethoate,isocarbophos,fenthion and phorate was poor,and the sensitivity to quinalphos was different between 3.0 and 2.5 mL.[Conclusions]The large difference of the sensitivity of the enzyme inhibition-colorimetric rapid detection kit for pesticide residues to different kits is a reason for the false positive and false negative test results of the kit,which needs to be considered by relevant personnel. 展开更多
关键词 Enzyme inhibition-colorimetry Reagent kit pesticide Inhibition rate Sensitivity
下载PDF
Determination of 14 Organophosphorus Pesticide Residues in Mutton by Gel Permeation Chromatography-Gas Chromatography-Mass Spectrometry(GPC-GC-MS)
12
作者 Junpeng ZHAO Richard Avoi +2 位作者 Azman Bin Atil@Azmi Jiao CHEN Ling YUN 《Agricultural Biotechnology》 2024年第3期28-30,33,共4页
[Objectives]This study was conducted to purify mutton samples by gel permeation chromatography(GPC).[Methods]Fourteen organophosphorus pesticide residues in samples were qualitatively and quantitatively analyzed by ga... [Objectives]This study was conducted to purify mutton samples by gel permeation chromatography(GPC).[Methods]Fourteen organophosphorus pesticide residues in samples were qualitatively and quantitatively analyzed by gas chromatography-mass spectrometry(GC-MS)in selective ion scanning mode(SIM).[Results]The organophosphorus pesticide standard solutions showed good linearity in the mass concentration range of 0.1-10.0μg/ml with correlation coefficients(r)not lower than 0.999,and the detection limits(S=3 N)ranged from 0.01 to 0.05 mg/kg.The average recovery values were in the range of 80.2%-99.7%,with relative standard deviations(RSDs,n=3)in the range of 1.8%-6.3%,at the addition levels of 0.5,1.0 and 2.0 mg/kg.[Conclusions]The method is simple,sensitive and accurate,and can be used for the determination of organophosphorus pesticide residues in mutton. 展开更多
关键词 MUTTON Gas chromatography-mass spectrometry Gel permeation chromatography ORGANOPHOSPHORUS pesticide residue
下载PDF
Plant-based vaccines against viral hepatitis: A panoptic review
13
作者 Devanathan Reka Chandrashekaran Girish 《World Journal of Virology》 2024年第3期49-55,共7页
The traditional vaccines against hepatitis have been instrumental in reducing the incidence of some types of viral hepatitis;however,the need for cost-effective,easily distributable,and needle-free vaccine alternative... The traditional vaccines against hepatitis have been instrumental in reducing the incidence of some types of viral hepatitis;however,the need for cost-effective,easily distributable,and needle-free vaccine alternatives has led to the exploration of plant-based vaccines.Plant-based techniques offer a promising avenue for producing viral hepatitis vaccines due to their low-cost cultivation,scalability,and the potential for oral administration.This review highlights the successful expression of hepatitis B surface antigens in plants and the subsequent formation of virus-like particles,which have shown immunogenicity in preclinical and clinical trials.The challenges such as achieving sufficient antigen expression levels,ensuring consistent dosing,and navigating regulatory frameworks,are addressed.The review considers the potential of plant-based vaccines to meet the demands of rapid vaccine deployment in response to outbreaks and their role in global immunization strategies,particularly in resource-limited settings.This review underscores the significant strides made in plant molecular farming and the potential of plant-based vaccines to complement existing immunization methods against viral hepatitis. 展开更多
关键词 plant-based therapeutics Plant vaccines Edible vaccines Viral hepatitis Phytopharmacology and molecular pharming
下载PDF
Agricultural Contamination of the Surface Waters of the Upper Ouémé in Benin: The Case of Heavy Metals and Pesticides
14
作者 Armelle Sabine Yélignan Hounkpatin Nonvignon Martial Fassinou +5 位作者 Fadéby Modeste Gouissi Zoulkanerou Orou Piami Dossou Armel Géraldo Houndeton Souradjou Orou Goura Wakili Bolatito Yessoufou Tayéwo Sylvain Biaou 《Journal of Agricultural Chemistry and Environment》 2024年第1期83-99,共17页
Objective: The main objective of this study was to assess the degree of contamination of surface waters by heavy metals and pesticides. Method: To this end, data were collected in December 2022 from four specific samp... Objective: The main objective of this study was to assess the degree of contamination of surface waters by heavy metals and pesticides. Method: To this end, data were collected in December 2022 from four specific sampling stations: Okpara, Térou, Affon and Adjiro. Levels of heavy metals, including cadmium, chromium, copper, iron, mercury, nickel and lead, were measured and subjected to in-depth statistical analysis using graphical summation models. In addition, the concentrations of pesticide active ingredients present in the samples were interpreted and evaluated. The statistical data collected during this study were processed using R software, version 3.5.0. Results: The values obtained at the different stations Okpara, Térou, Affon and Adjiro are respectively Arsenic (2 × 10<sup>-4</sup> mg/L;2.2 × 10<sup>-1</sup> mg/L;1.2 × 10<sup>-4</sup> mg/L;2 × 10<sup>-4</sup> mg/L), Cadmium (4.4 × 10<sup>-5</sup> mg/L;1.1 × 10<sup>-2</sup> mg/L;10<sup>-4</sup> mg/L;4 × 10<sup>-4</sup> mg/L). Then Copper (7 × 10<sup>-4</sup> mg/L;3 × 10<sup>-3</sup> mg/L;7 × 10<sup>-4</sup> mg/L;1 × 10<sup>-4</sup> mg/L), Iron (1.51 mg/L;6.4 × 10<sup>-1</sup> mg/L;2.0012 mg/L;2.9 × 10<sup>-1</sup> mg/L), Lead (0 mg/L;0 mg/L;1.5 × 10<sup>-3</sup> mg/L;1.5 × 10<sup>-3</sup> mg/L). Mercury, nickel and chromium were not detected in surface waters. It is important to note that the values obtained for trace metals (Cadmium, Chromium, Copper, Iron, Mercury, nickel and chromium were not detected in surface waters. It is important to note that the values obtained for trace metals (cadmium, chromium, copper, iron, mercury, nickel and lead) were all below the guideline standards set by the WHO in 2006 for uncontaminated surface waters. This indicates that the surface waters of the Upper Ouémé were below acceptable contamination thresholds in terms of heavy metals. However, the presence of pesticide active ingredients such as cyfluthrin, endosulfan-alpha, endosulfan-beta, profenosfos, tihan, atrazine, gala super and glycel clearly indicates that these surface waters are subject to agricultural contamination. 展开更多
关键词 Agricultural Contamination Heavy Metals pesticideS Surface Water North Benin
下载PDF
Control Effect of Botanical Pesticides against Ectropis oblique hmpulina and Empoasca pirisuga in Tea Plantation 被引量:6
15
作者 周顺玉 尹健 马俊义 《Plant Diseases and Pests》 CAS 2011年第4期68-71,共4页
[ Objective ] The paper was to study the effects of several botanical pesticides against two pests in tea plantation. [ Method] Using randomized block de- sign, different concentrations of botanical pesticides were sp... [ Objective ] The paper was to study the effects of several botanical pesticides against two pests in tea plantation. [ Method] Using randomized block de- sign, different concentrations of botanical pesticides were sprayed during the young larvae periods of Ectropis oblique hmpulina Wehrli and peak periods of Empoasca pirisuga, the reduction rate of population and control effects were investigated after spraying for 1,3,7 and 10 d. [ Result] 5% rotenone EC 800 times had the best control effect against E. oblique hmpulina, and 0.5% veratridine soluble liquid 800 times had the best control effect against E. pirisuga. 0. 5% veratridine soluble liquid, 0.2% celangulin EC, 0.3% matrine water agent and 7.5% rotenone EC could be selected as the pesticides for the control of E. oblique hmpulina; 0. 5% veratridine soluble liquid, 0. 2% celangulin EC, 0.3% azadirachtin EC, 0.3% matrine water agent and 7.5% rotenone EC could be selected as the pesticides for the control of E. pirisuga, of which 0. 3% azadiraehtin EC 600 times showed the best durable effect against E. pirisuga with control effect of 100% after spraying for 7 d. [ Conclusion] The results provided basis for application of botanical pesticides in pests control in tea plantation. 展开更多
关键词 Botanical pesticides E. oblique hmpulina E. pirisuga CONTROL China
下载PDF
Determination of 2 Amides Pesticide Residues in Agricultural Products by Terahertz Time-domain Spectroscopy 被引量:14
16
作者 王孝伟 王强 王花丽 《Agricultural Science & Technology》 CAS 2010年第8期53-56,共4页
[Objective] The aim was to explore the application of terahertz (THz) technique in pesticide recognition and residue determination. [Method] THz far-infrared spectral characteristics of 2 herbicides (butachlor and ... [Objective] The aim was to explore the application of terahertz (THz) technique in pesticide recognition and residue determination. [Method] THz far-infrared spectral characteristics of 2 herbicides (butachlor and metolachlor) were measured by THz time-domain spectroscopy (THz-TDS) under conditions of room temperature and nitrogen,meanwhile their refractive index and absorption coefficient between 0.2 and 2.2 THz were calculated by using models based on Fresenl equations. [Result] The 2 pesticides both had a series of different characteristic absorption peaks between 0.2 and 2.2 THz,respectively. Their molecular structures were similar,but there were great difference in absorption and refractive index spectrum between them. [Conclusion] THz-TDS technique is feasible to detect pesticide residues,especially there is a greater advantage in identifying the structure of similar substances. 展开更多
关键词 Terahertz wave pesticide residue THZ-TDS BUTACHLOR METOLACHLOR
下载PDF
Simultaneous Determination of Four Pesticide Residues in Fruit Juice by HPLC 被引量:4
17
作者 叶剑芝 林玲 +3 位作者 查玉兵 郭宏斌 王明月 杨春亮 《Agricultural Science & Technology》 CAS 2016年第10期2399-2402,共4页
[Objective] This study was conducted to develop a system for simultaneous determination of imidacloprid, diflubenzuron, thiabendazole and carbendazim in fruit juice by HPLC. [Method] Using acetonitrile as the extracti... [Objective] This study was conducted to develop a system for simultaneous determination of imidacloprid, diflubenzuron, thiabendazole and carbendazim in fruit juice by HPLC. [Method] Using acetonitrile as the extraction solvent, the pesticides in fruit juice were purified through a NH2 solid phase extraction (SPE) cartridge, then detected by HPLC. [Result] There was a good linear relationship between the peak area and the concentrations of imidacloprid, diflubenzuron, thiabendazole and carbendazim in a range of 0.05-5.0 μg/ml, and the linear correlation coefficient varied in a range of 0.999 0-0.999 8; the limit of detection for imidacloprid, diflubenzuron, thiabendazole and carbendazim was 0.003, 0.005, 0.003 and 0.007 mg/kg, respectively. The recovery rate of imidacloprid, diflubenzuron, thiabendazole and carbendazim standards added at three levels (0.1, 0.5 and 1.0 mg/kg) ranged from 82% to 107%, with RSD less than 4.5%. [Conclusion] The sensitivity, accuracy and precision of this method were able to meet the requirements for pesticide residue analysis. 展开更多
关键词 HPLC Fruit juice pesticide residues DETERMINATION
下载PDF
Selection of High-efficient Safe Pesticides for Controlling Tea Lesser Leafhopper(Empoasca vitis) 被引量:4
18
作者 周子燕 胡本进 +4 位作者 徐丽娜 胡飞 李昌春 高同春 苏卫华 《Agricultural Science & Technology》 CAS 2016年第7期1651-1653,共3页
[Objective] This study was conducted to select a batch of new high-effi- cient low-toxicity high-selectivity pesticides for the application in tea gardens. [Method] This experiment was designed with 12 treatments incl... [Objective] This study was conducted to select a batch of new high-effi- cient low-toxicity high-selectivity pesticides for the application in tea gardens. [Method] This experiment was designed with 12 treatments including clear water as the CK, in randomized block arrangement, with 4 replications, and each plot had an area of 30 m2. The pesticides were sprayed in the high occurrence period of larvae of tea lesser leafhopper when tea shoots grew vigorously. [Result] In the 11 pesti- cides, 100 g/L bifenthrin EC , 70% imidacloprid WDG and 150 g/L indoxacarb EC were the best pesticides with efficacies above 90%; and in the bio-pesticides, 0.5% azadirachtin SC showed an efficacy over 87.97%. [Conclusions] Among the tested pesticides, 100 g/L bifenthrin EC , 70% imidacloprid WDG and 150 g/L indoxacarb EC could effectively control tea lesser leafhopper during the outbreak of tea lesser leafhopper, and when the occurrence degree of tea lesser leafhopper is below the medium level, environment-friendly 0.5% azadirachtin SC, 0.5% veratrine SC, 0.3% matrine SC and 4.0×10^10 spores/g Beauveria bassiana OD could be selected. 展开更多
关键词 TEA Tea lesser leafhopper pesticideS EFFICACY
下载PDF
Study on Pesticide Screening and Control Techniques of Parathrene regalis Butler 被引量:4
19
作者 李红阳 周步海 +2 位作者 周加春 顾慧玲 张俊喜 《Agricultural Science & Technology》 CAS 2014年第10期1707-1709,共3页
[Objective] This study aimed to screen the effective pesticide for control-ling Parathrene regalis Butler. [Method] By field trials, the effects of six kinds of commonly used pesticides on P. regalis were determined. ... [Objective] This study aimed to screen the effective pesticide for control-ling Parathrene regalis Butler. [Method] By field trials, the effects of six kinds of commonly used pesticides on P. regalis were determined. ln addition, different agri-cultural measures were employed to integrate control technologies. [Result] At the early occurrence stage of P. regalis, spraying 7.5g/hm2 5% emamectin benzoate EC, 13.5 g/hm2 2% avermectin EC and 25 g/hm2 2.5% lambda-cyhalothrin EC can ef-fectively control P. regalis. [Conclusion] This study provided reference for the pre-vention and control of P. regalis. 展开更多
关键词 Parathrene regalis Butler pesticide Control techniques
下载PDF
Determination of 10 Pyrethroids Pesticide Residues in Rice by GC-MS-MS 被引量:1
20
作者 吴俐 曹赵云 +2 位作者 牟仁祥 林晓燕 陈铭学 《Agricultural Science & Technology》 CAS 2017年第8期1526-1530,共5页
[Objective] A method was developed for the determination of 10 pyrethroids pesticide residues in rice by GC-MS-MS. [Method] Pyrethroids were extracted with acetonitrile, followed by a salting-out step with anhydrous m... [Objective] A method was developed for the determination of 10 pyrethroids pesticide residues in rice by GC-MS-MS. [Method] Pyrethroids were extracted with acetonitrile, followed by a salting-out step with anhydrous magnesium sulfate and sodium chloride, cleaned up by florisil solid phase extraction (SPE) cartridge, and determined by multiple reaction monitoring mode. [Result] The method showed good linearity over the range of 0.010-0.500 mg/L for 10 pyrethroid pesticide with correlation coefficients over 0.99. The detection limits were 0.005 -0.010 mg/kg. The method was validated by analyzing samples spiked with 0.05, 0.10, 0.20 mg/kg of 10 pyrethroid pesticides, respectively. The average recoveries in rice ranged from 75.0-115.5%, and the relative standard deviations (RSD) were between 3.9%-6.9%. [Conclusion] The method is easy, accurate and reliable, which can meet the requirement for the simultaneous determination and confirmation of pyrethroid pesticide residues in rice. 展开更多
关键词 GC-MS-MS pesticide residues RICE PYRETHROIDS pesticide
下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部