pesticides and might be the major reason for faster dissipation of residue in period 2 at location 2 as observed in the present study [21] Since a strong correlation co-efficient (0 9583 - 0 9927) was obtained between residue dissipation and time it was concluded that the dissipation rate followed the first order kinetics at both periods and in The dissipation kinetic of the acetamiprid and iprodione in sweet cherry was determined by plotting residue concentration against time The half-life of pesticides calculated using the first order rate equation: Ct=C0e-kt where Ct represents the concentration of the pesticide residue at time t C0

Concentration and dissipation of chlorantraniliprole and

ABSTRACTTo study the dissipation rates and final residual levels of chlorantraniliprole and thiamethoxam in maize straw maize and soil two independent field trials were conducted during the 2014 cropping season in Beijing and Anhui Provinces of China A 40% wettable powder (20% chlorantraniliprole + 20% thiamethoxam) was sprayed onto maize straw and soil at an application rate

Oct 28 2015The dissipation kinetics remarkably followed the pseudo-first-order kinetic models The half-lives of amidosulfuron ranged from 1 30 to 7 99 days in wheat straw and from 2 33 to 18 58 days in soil whereas those of MCPA ranged from 0 48 to 6 74 days in wheat straw and from 3 10 to 22 22 days in soil at the three representative locations

Dissipation kinetics of imidacloprid residues in bhendi fruits G Preetha J Stanley T Manoharan and S Kuttalam Abstract Imidacloprid was applied at 15 25 and 50 g a i ha-1 in bhendi and the level of residue was assessed to arrive the safe pre harvest waiting period

Dissipation kinetics of bispyribac-sodium and metamifop in rice as an effective measure to control the wide array of weeds in a single application As the mixture herbicide is newly introduced in the market there is no systematic study available on its persistence dissipation

Abstract The dissipation patterns of amisulbrom in cucumber under a greenhouse condition wasinvestigated to establish biological half-life and pre-harvest residue limit (PHRL) Amisulbrom residue in/oncucumber on the day of application under standard application condition was 0 15 mg kg −1 and decreased to0 06mg kg −1 after 5 days after treatment so that biological half-life calculated 3

Dissipation and Residues of Lufenuron in Grape Fruits

The main objective of this study was to understand the residue and persistence behavior of lufenuron insecticide in grape fruit samples The residues were analyzed by HPLC and it dissipated in grape fruit following first order kinetics The average initial deposit of in grape fruit was observed to be 1 85mg kg -1 at single application rate

after the second application Dissipation followed a linear trend with gradual degradation The residue reached 0 063 and 0 089 mg kg −1 on 7 th and 10 th day respectively on recommended and double dose In mature fruits of pomegranate and juice the residues of fluopyram were below quantitation limit (BQL) of 0 05 mg kg − 1 The residues of fluopyram were also estimated in oil at harvest

Dissipation kinetics and pre‐harvest residue limit of pyriofenone in oriental melon (Cucumis melo Var makuwa) grown under regulated climatic conditions Hyung Suk Chung Natural Products Chemistry Laboratory College of Agriculture and Life Sciences Chonnam National University Gwangju Republic of

Nov 13 2011Dissipation of trifloxystrobin and tebuconazole were studied following two applications of a combination formulation of Nativo 75 WG (trifloxystrobin 25% + tebuconazole 50%) 250 and 500 g ha−1 at 10 days interval Samples of chili were collected at 0 1 3 5 7 10 and 15 days after the last application Red chili and soil samples were collected after 20 days of last application

We studied the dissipation of famoxadone and oxathiapiprolin in tomatoes grown using different kinetic curves in the area of Beijing in 2015 and 2016 Our results show that the most suitable model for two fungicides in 2015 and 2016 was first-order kinetic and second-order kinetic with the half-lives of 3 4 to 5 2 and 2 4 to 3 0 days respectively

Water samples collected on 0 (2h) 3 7 15 30 45 60 and 90 days after treatments were processed for residue analysis of benthiocarb by GC-NPD capillary system In 60 days dissipation was 92 82-93 81 % at pH 4 0 89 12-90 63 % at pH 7 0 and 92 67-93 88 % at pH 9 2 in both treatments showing very little effect of pH on dissipation

Table 4 First-order kinetic equations half-lives and pre-harvest intervals (PHI) for studied insecticides DISCUSSION The results of insecticide residue analysis showed that the dissipation of insecticides follow the first order kinetics The correlation coefficient ranged from 0 83 to 0 97

Representative grape and soil samples were randomly gathered at pre-harvest intervals (PHI) of 7 10 and 14 days in each plot after last spraying The dissipation residue experiment in the supervised trial began at a time where the grape was halfway through its maturity with a value of 93 75 mg kg −1 (1 5 times the recommended dosage)

Dissipation and Residues of Thiram in Potato and Soil

The residue levels of thiram during potato cultivation in open field were evaluated Thiram residues were determined by methylation derivation method with high performance liquid chromatography (HPLC) Wettable powder (WP) formulation containing 25% thiram was applied at 2320 g active gradient hm −2 (a i hm #x2212 2/sup) dosage for the dissipation study

Jun 01 2013After using maximum residue limits and mini- Method performance was assessed by evaluating quality mum dissipation constants k as determined through parameters such as selectivity limits of detection and min SPSS the first-order kinetics equation for pre-harvest quantification linearity recovery and reproducibility kmint residue limits

The dissipation kinetic of the acetamiprid and iprodione in sweet cherry was determined by plotting residue concentration against time The half-life of pesticides calculated using the first order rate equation: Ct=C0e-kt where Ct represents the concentration of the pesticide residue at time t C0

Dissipation Kinetics of Hexaconazole and Lambda-Cyhalothrin Residue in Soil and Potato Plant 2019 Abstract The dissipation behaviour and left-over residues of Hexaconazole fungicide and Lambda-Cyhalothrin pesticide in potato plant and soil were analysed by gas chromatography mass spectrometry (GC-MS) At fortified levels of 10 100 and

the concentration and residue decline kinetics (i e dissipation rates and pre-harvest intervals) of two previously-synthesized IMI nanoformulations on P vulgaris seeds under field conditions Furthermore it compares all factors to those of IMI's commercial formulation (35% SC) Results from this study will be

Oct 10 2019The results showed that the dissipation kinetics of bifenthrin and ethion can be described by a first-order kinetics model with a half-life (t 0 5) of 1 92 and 2 43 days for bifenthrin and 2 2 and 2 59 days for ethion at the low and high recommended application rates respectively For safe consumption of dates waiting periods of 12 and 28

The dissipation behavior and degradation kinetics of azoxystrobin carbendazim and difenoconazole in pomegranate are reported Twenty fruits/hectare (5 kg) were collected at random ensuring sample-to-sample relative standard deviation (RSD) within 20–25% Each fruit was cut into eight equal portions and two diagonal pieces per fruit were drawn and combined to constitute the laboratory

Feb 01 2018Dissipation kinetics and PHRLs The equation C t = C 0 e-kt where C t (mg/kg) is the concentration at time t and C 0 (mg/kg) is the initial concentration was used for calculating the dissipation pattern The equation t 1/2 = (ln2)/k where k (day −1) is the rate constant was used for calculating the decay half-life 2 8 Pre-harvest

kinetic-energy equation is then cast to a novel form which is free from the work rate done by surface stresses but in which the full dissipation reenters Key words kinetic energy dissipation enstrophy surface strain Subject classification Fluid Mechanics 1 Introduction

From the pre-harvest residue limit curve it was predicted that if the residues were 1 13 or 1 40 mg/kg 10 days before harvest the residue level would be lower than the MRL during harvest Risk assessment on day 0 showed an acceptable daily intake (%) of 13 0% and 11 0% for sites 1 and site 2 respectively which indicates that the residual

Imidacloprid was rapidly dissipated in cucumbers following a first order reaction kinetics at both application rates The amount of dissipation in 21 days was 94 48% and 99 18% for respectively the single and double dosages Residues of imidacloprid dissipated below the maximum residue limit (MRL) of 1 mg kg _1 in 3 days Half-life (T

In order to obtain detectable valid residue data even in 20–30 days after spraying the treatment dosage for the dissipation experiment was set as 240 g a i ha −1 (3 times of the normal recommended dosage) About 1500 mL of paddy water 500 g of rice seedling and 500 g soil samples were collected from 8–10 randomly selected sampling