-
Open Access Article
1 - Combination of QuEChERS Dispersive Liquid-Liquid Microextraction based on Magnetic Ionic Liquids for extraction of Carbamate Pesticides from Apple Samples prior to their analysis by High Performance Liquid Chromatography
Sajjad Farajpour Mohammad Reza Afshar Mogaddam Jalil Khandaghi Introduction: Today, the use of pesticides has become an essential part of agricultural activities. Due to their relatively short lifespan, strong effect, and extensive variety of biological activities, carbamates are one of those that are frequently utilized as i More Introduction: Today, the use of pesticides has become an essential part of agricultural activities. Due to their relatively short lifespan, strong effect, and extensive variety of biological activities, carbamates are one of those that are frequently utilized as insecticides. The need to monitor the presence of pesticides in food products is a major concern because of their major risk on consumers' health.Materials and Methods: In the current research, Aldicarb, Carbaryl, and Primicarb insecticides were extracted from apple samples using a combination of QuEChERS technique with dispersive liquid-liquid microextraction, and their determination was carried out using HPLC-DAD. For this purpose, the effect of the effective factors in the two stages of the proposed extraction process was investigated and optimized. Also, merit figures including linear range, limits of detection and quantification, repeatability, enrichment factor, and extraction recovery were calculated in order to validate the developed method.Results: Concerned with the broad linear range (10.7-2000 ng/g) and the repeatability based on RSD% of 2.6 to 4.8, the proposed method proved highly capable of extracting the desired pesticide residues from apple samples. Under optimal conditions, the suggested approach had an extraction efficiency of 67–75%, an enrichment factor of greater than 335, and limits of detection and quantification of less than 4.2 and 14 ng/ml, respectively, which were less than the MRLs set for these pesticides in fruits and vegetables. The mentioned method was successfully performed on real apple samples and the results revealed that the samples did not contain any of the expected carbamates.Conclusion: In general, the developed method has the necessary ability to detect carbamate insecticides in apple samples. This method offers several advantages of being simple and reliable, employing green solvents, and short analysis time. Manuscript profile -
Open Access Article
2 - Comparing efficiency of some insecticides in controlling chickpea pod borer, Heliothis viriplaca (Lep.: Noctuidae)
Farnaz Seyyedi SahebariChick pod borer, Heliothis viriplaca Hufn, is an important pest of chickpea in East Azarbaijan province. In recent years, pesticides harmful effects have become a problem. This matter is also true regarding chemical control of chickpea pod borer. Therefore, the efficacy MoreChick pod borer, Heliothis viriplaca Hufn, is an important pest of chickpea in East Azarbaijan province. In recent years, pesticides harmful effects have become a problem. This matter is also true regarding chemical control of chickpea pod borer. Therefore, the efficacy of some insecticides such as Indoxacarb Sc15%, Indoxacarb Ec15%, Pyridalyl Ec 50%, Carbaryl Wp 85% with a control (only water) against chickpea pod borer, was evaluated in Maragheh, East Azarbaijan during 2007-2008. The experiment was carried out with ILC 482 variety in RCBD design with three replications. Sampling and counting of live larvae was done 1 day before and 1, 3, 7 and 12 days after treatment by randomly selecting 20 plants from four middle rows in each plot and at the end of the experiment, the number of total pods and damaged pods in 20 plants of each plot was determined. The results of 7th and 12th days after insecticides application showed a significant difference among treatments at level of 5%. Indoxacarb Ec 15% (200 ml/ha) and Indoxacarb Sc15% (200 ml/ha) were both the most effective treatments followed by Piridalyl EC 50% (150 and 200 ml/ha) and Carbaryl wp 85%. Manuscript profile -
Open Access Article
3 - Prediction of toxicity and octanol–water partition coefficient of Carbamate Derivativesas Insecticides Using Genetic Algorithm-Multiple Linear Regressions Method
Atefehsadat Navabi Tahereh Momeni Isfahani Majid Ramazani Mohammad AlimoradiA Quantitative Structure–Activity Relationship (QSAR) study based on Genetic Algorithm Multiple Linear Regressions (GA-MLR) were carried out for the prediction of the toxicity (logIC50) and the logarithm of octanol-water partition coefficient (logPow) of som MoreA Quantitative Structure–Activity Relationship (QSAR) study based on Genetic Algorithm Multiple Linear Regressions (GA-MLR) were carried out for the prediction of the toxicity (logIC50) and the logarithm of octanol-water partition coefficient (logPow) of some carbamate derivatives as insecticides. The optimized conformation of compounds were obtained at HF/6-31G* level with Gaussian 98 software. Dragon software is used to calculate molecular descriptors. A data set of these compounds was randomly divided into 2 groups: training and test sets. The QSAR models were optimized using multiple linear regressions (MLR).The most relevant molecular descriptors were collected by Genetic Algorithm (GA) and backward regression. The best GA-MLR models are obtained using statistical parameters, such as squared correlation coefficient (R2), adjusted squared correlation coefficient (R2adj), root mean square error (RMSE) values for training and test sets. The best QSAR models are obtained based on the statistical parameters Leave-one-out (LOO) cross-validation, external test set, external validation parameters (Q2F1, Q2F2, Q2F3) and the concordance correlation coefficient (CCC) were used to quantify the predictive ability of GA-MLR models. The results showed that GA-MLR models could be used to predict the activities of carbamate derivatives. Manuscript profile -
Open Access Article
4 - Lethal and sub lethal effects of flubendiamide, emamectin benzoate+lufenuron, thiocyclam and spinosad on Habrobracon hebetor Say (Hym.: Braconidae) in laboratory condition
سلما papary AbuFazel Dousti مجید falahzadeh نازیلا saghaiBraconid wasps (Braconidae) are one of the most important pest parasitoids. The function of parasitoids can be affected by the use of insecticides. In order to use biological control agents and pesticides simultaneously in pest management, it is necessary to know the ef MoreBraconid wasps (Braconidae) are one of the most important pest parasitoids. The function of parasitoids can be affected by the use of insecticides. In order to use biological control agents and pesticides simultaneously in pest management, it is necessary to know the effect of pesticides on biological control agents. In this study, the lethal and sub lethal effects of the flubendiamide, emamectin benzoate+lufenuron, thiocyclam and spinosad on the parasitoid Habrobracon hebetor (Say) (Hymenoptera: Braconidae) were investigated. The LC50 of spinosad on parasitoid wasps were 1.25 mg/L of active ingredient, which showed that this insecticide is the most toxic compound on this insect and LC50 of thiocyclam, emamectin benzoate+lufenuron and flubendiamide were 19.99, 7.56 and 6.45 mg/L of active ingredient respectively, which were more toxic to this wasp, respectively. The results of bioassays on adult insects of parasitoid wasps showed that spinosad with LC30 was 0.71 mg /L of active ingredient with high toxicity on adult insects compared to flubendiamide, emamectin benzoate+lufenuron and thiocyclam, which were LC30, 3.67, 4.26 and 14.44 respectively. According to the classification of the International Organization for Biological Control, spinosad was in the group of harmful insecticides and emamtectin benzoate + lufenuron and flubendiamide were in the group of moderately harmful insecticides. According to this classification, thiocyclam was classified as harmless insecticide on bracon wasp. Manuscript profile -
Open Access Article
5 - Effect of some usual insecticides on Chrysoperla carnea Stephens under labratory conditions
manizheh ma.jamshidi@yahoo.com Masoud Taghizadeh Sajad Fouladi AzarChemical control and biological control are an important part of integrated pest management (IPM). Insecticides affect the physiology or behavior of insects, posing risks to non-target organisms. The green lacewing, Chrysoperla carnea which is the best predator natural MoreChemical control and biological control are an important part of integrated pest management (IPM). Insecticides affect the physiology or behavior of insects, posing risks to non-target organisms. The green lacewing, Chrysoperla carnea which is the best predator natural enemies to control pests on farms, orchards and forests of the country widely perceived to be in nature and play an important role in preventing the rapid proliferation of pests and shall have the vital balance The green lacewing most attention as a promising biological control agent released against pests in greenhouses, farms and gardens has attracted. In this study, the effects of sublethal doses of Primicarb, Imidacloprid and Oxydemetonmethyl against Chrysopa carnea Stephens (Neuroptera: Chrysopidae) were determined and compared. The results showed that these insecticides at LC30 had significant effect on the stable population parameters. Intrinsic rate of population increase (r) values for control‚ Primicarb, Imidacloprid and Oxydemetonmethyl were 0.142‚ 0.141‚ 0.140 and 0.134 (day-1), respectively. According to our results, there was significant differences in Imidacloprid and Oxydemetonmethyl rate of population increase (P≤0.5) compared to the control; also, three insecticides had significant effect on survival rate and life expectancy compared to control. These results provided that Primicarb had lower toxicity on Chrysopa carnea but theoretical basis for the rational use of Imidacloprid and Oxydemetonmethyl insecticides and the utilization and protection of C. carnea Manuscript profile -
Open Access Article
6 - Effect of some commen insecticides on Chrysoperla carnea Stephens under labratory conditions
Sajad Fouladi Azar manizheh ma.jamshidi@yahoo.com Masoud TaghizadehChemical control and biological control are an important part of integrated pest management (IPM). Insecticides affect the physiology or behavior of insects, posing risks to non-target organisms. The green lacewing, Chrysoperla carnea which is the best predator natural MoreChemical control and biological control are an important part of integrated pest management (IPM). Insecticides affect the physiology or behavior of insects, posing risks to non-target organisms. The green lacewing, Chrysoperla carnea which is the best predator natural enemies to control pests on farms, orchards and forests of the country widely perceived to be in nature and play an important role in preventing the rapid proliferation of pests and shall have the vital balance The green lacewing most attention as a promising biological control agent released against pests in greenhouses, farms and gardens has attracted. In this study, the effects of sublethal doses of Primicarb, Imidacloprid and Oxydemetonmethyl against Chrysopa carnea Stephens (Neuroptera: Chrysopidae) were determined and compared. The results showed that these insecticides at LC30 had significant effect on the stable population parameters. Intrinsic rate of population increase (r) values for control‚ Primicarb, Imidacloprid and Oxydemetonmethyl were 0.142‚ 0.141‚ 0.140 and 0.134 (day-1), respectively. According to our results, there was significant differences in Imidacloprid and Oxydemetonmethyl rate of population increase (P≤0.5) compared to the control; also, three insecticides had significant effect on survival rate and life expectancy compared to control. These results provided that Primicarb had lower toxicity on C. carnea but theoretical basis for the rational use of Imidacloprid and Oxydemetonmethyl insecticides and the utilization and protection of C. carnea. Manuscript profile -
Open Access Article
7 - The Toxicity Investigation of the Botanical Insecticides on the Common Pistachio Psyllid, Agonoscena pistaciae Burckhardt and Lauterer (Hemiptera: Psyllidae)
Z. Sheibani M. R. Hassani -
Open Access Article
8 - Insecticidal activity of tarragon, common and field wormwood essential oils against green peach aphid
Zahra Jafari Soleiman Jamshidi hassan nourafcanArtemisia species are historically considered as highly potential insecticidal plants used for tackling harmful house insects. The essential oils of three Artemisia species including A. dracunculus, A. campestris and A. austriaca spelendes essential oils were extracted MoreArtemisia species are historically considered as highly potential insecticidal plants used for tackling harmful house insects. The essential oils of three Artemisia species including A. dracunculus, A. campestris and A. austriaca spelendes essential oils were extracted by maceration using Clevenger apparatus. The Artemisia species essential oil yields were measured and volatile chemical compounds were identified by MS gaschromatography method. The insecticidal activity of essential oils was determined by bioassay methods against green peach aphid during 12 hours with concentrations of 62, 125, 250 and 500 ppm and 1, 2, 4, 6 recording mortality rate every other two hours. The essential oils yield of tarragon, common and field wormwood were determined as 6.8, 4, and 3.9 ml/kg plant biomass, respectively. Also, 6, 8, and 16 volatile chemical compounds were identified from tarragon, common and field wormwood , respectively. The main compounds for the three species were as follows methyl-cavicole, cis-osimen and limonene in A. dracunculus, 1,8-cineol and 3,5-peptadin 2-ol in A. campestris camphor, and beta-thujan, caryophyllen oxide, alpha thujan, 1,3-Cineol and caryophyllen in A. austriaca. All of the three plant essential oils showed a considerable mortality rate against green peach aphid while aphidicidal activity of tarragon was considerably higher than the other two species. The amounts of 50 percentage mortality rates of tarragon, common and field wormwood were lower than 62, 382, and 576 ppm, respectively. Therefore, essential oils of tarragon on peach green aphid can be considered as safe natural products and a substitution as dangerous chemicals in agricultural crops. Manuscript profile -
Open Access Article
9 - Iinsecticidal activity of tarragon essential oils and chemical pesticides reduced doses integration against green peach aphid
Payam Mianaji Soleiman Jamshidi Hassan NourafcanGreen peach aphid is one of the most important pests of various agricultural products.Green peach aphid is one of the most important pests of various agricultural products. Manuscript profile
Sanad
Sanad is a platform for managing Azad University publications
Links
Related Centers
Technical Support
Official pages
The rights to this website are owned by the Raimag Press Management System.
Copyright © 2021-2024