scholarly journals Design, Synthesis, and Acaricidal Activity of Phenyl Methoxyacrylates Containing 2-Alkenylthiopyrimidine

Molecules ◽  
2020 ◽  
Vol 25 (15) ◽  
pp. 3379
Author(s):  
Shulin Hao ◽  
Zengfei Cai ◽  
Yangyang Cao ◽  
Xiaohua Du
Keyword(s):  
Mass Spectra ◽  
Field Trials ◽  
Acaricidal Activity ◽  
Tetranychus Cinnabarinus ◽  
Ovicidal Activity ◽  
Design Synthesis ◽  
Rapid Action ◽  
Ld50 Value ◽  
Greenhouse Tests ◽  
Methyl Phenyl

A series of novel phenyl methoxyacrylate derivatives containing a 2-alkenylthiopyrimidine substructure were designed, synthesized, and evaluated in terms of acaricidal activity. The structures of the title compounds were identified by 1H NMR, 13C NMR and high-resolution mass spectra (HRMS). Compound (E)-methyl 2-(2-((2-(3,3-dichloroallylthio)-6-(trifluoromethyl)pyrimidin-4-yloxy)methyl)phenyl)-3-methoxyacr-ylate (4j) exhibited significant acaricidal activity against Tetranychus cinnabarinus (T. cinnabarinus) in greenhouse tests possessing nearly twice the larvicidal and ovicidal activity compared to fluacrypyrim. Furthermore, the results of the field trials demonstrated that compound 4j could effectively control Panonychuscitri with long-lasting persistence and rapid action. The toxicology data in terms of LD50 value confirmed that compound 4j has a relatively low acute toxicity to mammals, birds, and honeybees.

scholarly journals Design, Synthesis, and Biological Activities of Novel 1,3,5-Trimethylpyrazole-Containing Malonamide Derivatives

Molecules ◽  
2019 ◽  
Vol 24 (3) ◽  
pp. 562 ◽  
Author(s):  
Qi-Bo Li ◽  
Min Liao ◽  
Qing Liu ◽  
Tong Feng ◽  
Zhi-Yuan Xu ◽  
...  
Keyword(s):  
Plutella Xylostella ◽  
Mass Spectra ◽  
Biological Activities ◽  
Aphis Craccivora ◽  
Moderate Activity ◽  
Tetranychus Cinnabarinus ◽  
Substitution Pattern ◽  
Design Synthesis ◽  
Structural Modifications ◽  
Insecticidal Activities

New 1,3,5-trimethylpyrazole-containing malonamide derivatives based on pyflubumide were designed, synthesized, and characterized using 1H-NMR, 13C-NMR, and high-resolution mass spectra (HRMS). The results of preliminary bioassays showed that the target compounds possessed good activities against Tetranychus cinnabarinus, Plutella xylostella, and Aphis craccivora. Most of the target compounds exhibited moderate to good acaricidal activity against Tetranychus cinnabarinus at a concentration of 400 µg/mL, and some showed moderate activity at a concentration of 200 µg/mL; in particular, compounds 8m and 8p exhibited 70.0% mortality. In addition, some of the target compounds exhibited good insecticidal activities against Plutella xylostella at a concentration of 200 µg/mL, especially compounds 8i and 8o, which achieved 100.0% mortality at a concentration of 100 µg/mL. Interestingly, some of the target compounds exhibited potent anti-aphid activity against Aphis craccivora at a concentration of 200 µg/mL; furthermore, compounds 8p and 8q demonstrated 100.0% anti-aphid activity at a concentration of 50 µg/mL. The preliminary analyses of the structure–activity relationships (SAR) indicated that the acaricidal and insecticidal activities varied significantly depending on the type of substituent and substitution pattern, which provides guidance for the further investigation of such structural modifications.

Comparative toxicity of foliar and systemic applications of acetamiprid and imidacloprid against the cotton whitefly, Bemisia tabaci (Hemiptera: Aleyrodidae)

1998 ◽  
Vol 88 (4) ◽  
pp. 437-442 ◽  
Author(s):  
A.R. Horowitz ◽  
Z. Mendelson ◽  
P.G. Weintraub ◽  
I. Ishaaya
Keyword(s):  
Bemisia Tabaci ◽  
Residual Activity ◽  
Field Trials ◽  
Adult Mortality ◽  
Cotton Field ◽  
Ovicidal Activity ◽  
Laboratory Conditions ◽  
Controlled Conditions ◽  
Comparative Toxicity ◽  
Cotton Whitefly

AbstractComparative bioassays of two chloronicotinyl insecticides, acetamiprid and imidacloprid, against the whitefly Bemisia tabaci (Gennadius), using foliar and systemic applications, were conducted under laboratory conditions and in field trials. Under controlled conditions, the ovicidal activity of foliar applications of acetamiprid on cotton seedlings was much higher than that of imidacloprid. According to LC50 and LC90 values, acetamiprid was 10- and 18-fold more potent than imidacloprid. Both compounds were effective when applied to soil against whitefly adults; however, the potency of imidacloprid was somewhat higher than that of acetamiprid 2, 7 and 14 days after application; resulting (with the concentration of 25 ml a.i./l) in adult mortality of 90, 93, and 96% and 76, 84, and 76% respectively. In an experimental cotton field, the efficacy of foliar applications of 60 g a.i./ha acetamiprid and 210 g a.i./ha imidacloprid was compared. Field residual activity of acetamiprid to whitefly adults lasted for approximately ten days, compared with three days for imidacloprid.

scholarly journals Design, Synthesis and Biological Evaluation of Novel 1, 3, 4-Oxadiazole Bearing Pyridine Moiety

2019 ◽  
pp. 300-307
Author(s):  
Asma D. Ambekari ◽  
Shrinivas K. Mohite
Keyword(s):  
Antimicrobial Activity ◽  
Mass Spectra ◽  
Biological Evaluation ◽  
Design Synthesis ◽  
Pyridine Moiety ◽  
Anti Inflammatory ◽  
Physicochemical Data ◽  
Synthesis And Biological Evaluation

Series of novel substituted Synthesis of N-{[5-(substituted)-1,3,4-oxadiazole-2-yl] carbamothioyl} derivatives containing 1,3,4-oxadiazole moiety were synthesized by microwave as a green chemistry method and conventional method by using pyridine 3- carboxylic acid as a starting material. The structures of the synthesized compounds were characterized by physicochemical data, IR, Mass spectra and 1HNMR. All the newly synthesized compound screened for their antimicrobial and In-vivo and In-vitro Anti-inflammatory studies. Anti-inflammatory studies revealed that compound 4f showed significant in-vivo and in-vitro anti-inflammatory activity as well potent antimicrobial activity.

Activated Carbon-Vermiculite Mixture for Increasing Herbicide Selectivity

Weed Science ◽  
1971 ◽  
Vol 19 (1) ◽  
pp. 79-81 ◽  
Author(s):  
B. A. Kratky ◽  
G. F. Warren
Keyword(s):  
Activated Carbon ◽  
Cucumis Sativus ◽  
Protected Area ◽  
Small Area ◽  
Soil Surface ◽  
Field Trials ◽  
Lycopersicum Esculentum ◽  
Direct Seeded ◽  
Preemergence Herbicides ◽  
Greenhouse Tests

A mixture of activated carbon and vermiculite was used to increase the tolerance to 2-chloro-4,6-bis(ethylamino)-s-triazine (simazine) of direct-seeded cucumbers (Cucumis sativusL., var. Wisconsin SMR-15) in greenhouse tests and direct-seeded tomatoes (Lycopersicum esculentumMill, var. Bouncer) in greenhouse and field (var. Heinz 1370) tests. The tolerance of cucumbers to dimethyl tetrachloroterephthalate (DCPA) and 4-(methylsulfonyl)-2,6-dini tro-N,N-dipropylaniline (nitralin) also was increased in field trials. When the mixture was placed in a hole (0.75 inch deep by 1 inch diam) over the crop seed to the level of the soil surface, preemergence herbicides were detoxified in the small area; and the crop plant was not injured. The herbicide remained active outside the small protected area. Also, a wafer consisting of an activated carbon-vermiculite mixture, fertilizer, and seed provided protection to direct-seeded crops.

scholarly journals 5-(6-Hydroxy-6-methyl-5-oxoheptan-2-yl)-2-methyl Phenyl Acetate

Molbank ◽  
10.3390/m1041 ◽  
2018 ◽  
Vol 2019 (1) ◽  
pp. M1041
Author(s):  
Maya Rahayu ◽  
Susi Kusumaningrum ◽  
Hayun Hayun
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Fourier Transform ◽  
Mass Spectra ◽  
Multiple Bond ◽  
Phenyl Acetate ◽  
Two Dimensional ◽  
Heteronuclear Multiple Bond Correlation ◽  
1H Nuclear Magnetic Resonance ◽  
Resolution Mass ◽  
Methyl Phenyl

We synthesized a novel compound, 5-(6-hydroxy-6-methyl-5-oxoheptan-2-yl)-2-methylphenyl acetate, in a good yield by oxidation of 1-O-acetyl-xanthorrizol using potassium permanganate in acidic condition. The structure was elucidated by Fourier Transform Infrared (FTIR), 1H-Nuclear Magnetic Resonance (NMR) and 13C-NMR, two-dimensional (2D)-HSQC, Distortionless Enhancement by Polarization Transfer (DEPT), 2D-Heteronuclear Multiple Bond Correlation (HMBC), and High-Resolution Mass Spectra (HRMS) spectral data.

Ovicidal and toxic effects of certain plant extracts to the castor semilooper, Achaea janata L. (Noctuidae: Lepidoptera)

2017 ◽  
Vol 51 (04) ◽  
Author(s):  
Ashwini A. Devarshi ◽  
S. R. Yankanchi
Keyword(s):  
Fourth Instar ◽  
Toxic Effects ◽  
Vitex Negundo ◽  
Ovicidal Activity ◽  
Leaf Extracts ◽  
Argemone Mexicana ◽  
Cent Mortality ◽  
Achaea Janata ◽  
Castor Semilooper ◽  
Ld50 Value

Ovicidal and toxic effects of crude leaf extracts of Clerodendrum inerme, Clerodendrum splendens, Clerodendrum multiflorum, Vitex negundo and Argemone mexicana were evaluated against the castor semilooper, Achaea janata L. (Noctuidae: Lepidoptera) using different bioassay methods. Among the extracts tested, the highest ovicidal activity was observed in C. splendens as well as A. mexicana with LD50 values of 7.65 and 9.14 mg-1, respectively. Leaf extracts of A. mexicana and C. inerme were toxic to both third and fourth instar larvae of A. janata through topical application. However, the extracts of A. mexicana and C. inerme found to be more toxic to third instar larvae with 70 and 73 per cent mortality, respectively. The lowest LD50 value of 5.33 mg-1 was recorded by A. mexicana extract and was followed by C. inerme extract with LD50 value of 7.26 mg-1. Present results indicated that A. mexicana and C. inerme plants have potential to use in IPM programme.

Design, Synthesis, Acaricidal Activity, and Mechanism of Oxazoline Derivatives Containing an Oxime Ether Moiety

2014 ◽  
Vol 62 (14) ◽  
pp. 3064-3072 ◽  
Author(s):  
Yongqiang Li ◽  
Chaojie Li ◽  
Yanlong Zheng ◽  
Xingcun Wei ◽  
Qiaoqiao Ma ◽  
...  
Keyword(s):  
Acaricidal Activity ◽  
Oxime Ether ◽  
Design Synthesis ◽  
Oxazoline Derivatives

Root rot of irrigated lentils in Iran

1980 ◽  
Vol 58 (24) ◽  
pp. 2549-2556 ◽  
Author(s):  
Walter J. Kaiser ◽  
Glenn M. Horner
Keyword(s):  
Root Rot ◽  
Lens Culinaris ◽  
Pythium Ultimum ◽  
Macrophomina Phaseolina ◽  
Field Trials ◽  
Fusarium Spp ◽  
Sources Of Resistance ◽  
Highly Pathogenic ◽  
P Fertilizer ◽  
Greenhouse Tests

In some areas of Iran, root rot of irrigated lentils (Lens culinaris) was a serious problem resulting in high plant mortality and decreased yields. Pythium ultimum was the predominant soil-borne pathogen isolated from discolored, necrotic roots of diseased plants in furrow-irrigated fields at Karaj, and appeared to be the primary incitant of root rot of irrigated lentils at several other locations in the country. Pythium aphanidermatum was the primary pathogen isolated from roots of diseased lentils at two irrigated sites in southern Iran. Isolates of P. ultimum and P. aphanidermatum were highly pathogenic on roots of lentil in greenhouse inoculation studies. Other fungi isolated from diseased lentil roots less frequently were Rhizoctonia solani, Phytophthora sp., Macrophomina phaseolina, Fusarium oxysporum, F. roseum, and F. solani. Cultures of R. solani, Phytophthora sp., and M. phaseolina were less pathogenic on lentil roots than either Pythium sp., whereas the three Fusarium spp. were nonpathogens. Incidence and severity of root rot increased in Karaj field trials in treatments receiving N and P fertilizer and irrigation every 6 days. In greenhouse tests, incidence of root rot increased when naturally infested Karaj soils were amended with 1 or 10% cow manure before planting. Sources of resistance to the lentil root rot complex were found in germplasm screened in naturally infested soils at Karaj.

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