The composition of the essential oil (EO) from Cryptocarya alba obtained by hydro distillation of fresh leaves was analyzed using gas chromatography (GC) and gas chromatography/mass spectrosmetry (GC/MS). The insecticidal effect of the oil on the house fly Musca domestica was evaluated by placing flies in a sealed glass jar containing a piece of EO-treated cotton yarn. The dose necessary to kill 50% of flies (LC50) in 0.5 and 1 h was determined at 26 ± 1 °C. The essential oil from Cryptocarya alba showed significant insecticidal properties [33.56 (7.06-159.50) mg/dm3 (0.5 h) and 15.07 (5.29-42.91) mg/dm3 (1 h)]. According to GC and GC/MS analysis a total of 38 compounds were identified. The composition of the Cryptocarya alba essential oil reported in this study is different to that reported in other publications with  4-terpineol (17.48%) ; 4- (3,3-dimethyl-but-1-ynyl) -4-hydroxy-2,6,6-trimethylcyclohex-2-enone (12.84%); 1,8-cineole (7.90%); p-cymene (7.11%) and sabinene (6.80%), accounting for 52.13% of the EO. The EO from Cryptocarya alba appears promising as a natural insecticide against houseflies.  
Keywords: Musca domestica; Cryptocarya alba; essential oil composition; GC-MS; NMR; natural insecticide.Fil: Di Cosmo, Dania. Universidad de Santiago de Chile; ChileFil: Santander, Rocio. Universidad de Santiago de Chile; ChileFil: Urzúa, Alejandro. Universidad de Santiago de Chile; ChileFil: Palacios, Sara Maria. Universidad Católica de Córdoba. Facultad de Ciencias Químicas; ArgentinaFil: Rossi, Yanina Estefanía. Universidad Católica de Córdoba. Facultad de Ciencias Químicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones y Transferencia de Villa María. Universidad Nacional de Villa María. Centro de Investigaciones y Transferencia de Villa María; Argentin

Di Cosmo, Dania

Palacios, Sara Maria

Rossi, Yanina Estefanía

Santander, Rocio

Urzúa, Alejandro

Boletin Latinoamericano y del Caribe de plantas Medicinales y Aromaticas

LAReferencia - Red Federada de Repositorios Institucionales de Publicaciones Científicas Latinoamericanas

  © 2015  Boletín Latinoamericano y del Caribe de Plantas Medicinales y Aromáticas 14 (2): 113 - 117 ISSN 0717 7917 www.blacpma.usach.cl   Artículo Original | Original Article 113   Insecticidal effect of Cryptocarya alba essential oil on the housefly,  Musca domestica L  [Efecto insecticida del aceite esencial de Cryptocarya alba en la mosca doméstica, Musca domestica L.]   Dania DI COSMO1, Rocío SANTANDER1, Alejandro URZÚA1, Sara M. PALACIOS2 & Yanina ROSSI2  1Laboratory of Chemical Ecology, Faculty of Chemistry and Biology, Universidad de Santiago de Chile,  Casilla 40, Correo 33, Santiago, Chile 2Laboratory of Fine Chemicals and Natural Products, Faculty of Chemical Sciences. Catholic University of Córdoba,  Camino a Alta Gracia Km 10, (5000) Córdoba, Argentina  Contactos | Contacts: Rocío SANTANDER - E-mail address: rocio.santanderm@usach.cl Contactos | Contacts: Dania DI COSMO - E-mail address: dania.dicosmo@usach.cl   Abstract: The composition of the essential oil (EO) from Cryptocarya alba obtained by hydro distillation of fresh leaves was analyzed using gas chromatography (GC) and gas chromatography/mass spectrosmetry (GC/MS). The insecticidal effect of the oil on the house fly Musca domestica was evaluated by placing flies in a sealed glass jar containing a piece of EO-treated cotton yarn. The dose necessary to kill 50% of flies (LC50) in 0.5 and 1 h was determined at 26 ± 1 °C. The essential oil from Cryptocarya alba showed significant insecticidal properties [33.56 (7.06-159.50) mg/dm3 (0.5 h) and 15.07 (5.29-42.91) mg/dm3 (1 h)]. According to GC and GC/MS analysis a total of 38 compounds were identified. The composition of the Cryptocarya alba essential oil reported in this study is different to that reported in other publications with  4-terpineol (17.48%) ; 4- (3,3-dimethyl-but-1-ynyl) -4-hydroxy-2,6,6-trimethylcyclohex-2-enone (12.84%); 1,8-cineole (7.90%); p-cymene (7.11%) and sabinene (6.80%), accounting for 52.13% of the EO. The EO from Cryptocarya alba appears promising as a natural insecticide against houseflies.  Keywords: Musca domestica; Cryptocarya alba; essential oil composition; GC-MS; NMR; natural insecticide.    Resumen: La composición del aceite esencial (AE), obtenido por hidrodestilación de hojas frescas de Cryptocarya alba se analizó mediante cromatografía de gases (CG) y cromatografía de gases/espectrometría de masas (CG/EM). La actividad insecticida del aceite contra la mosca doméstica, Musca domestica se evaluó colocando las moscas en un frasco de vidrio sellado con un trozo de hilo de algodón tratado con diferentes cantidades de AE. La dosis necesaria para matar el 50% de las moscas (LC50)  en 0,5 y 1 hora se determinó a 26 ± 1 ºC. El aceite esencial de Cryptocarya alba mostró un buen efecto insecticida [33,56 (7,06-159,50) mg/dm3 (0,5 h) and 15,07 (5,29-42,91) mg/dm3 (1 h)]. La composición del aceite esencial de Cryptocarya alba encontrada en este trabajo es diferente al informado en otras publicaciones, con 4-terpineol (17,48%); 4-(3,3-dimetil-but-1-inil)-4-hidroxi-2,6,6-trimetilciclohex-2-enona (12.84%); 1,8-cineole (7,90%); p-cimeno (7,11%) y sabineno (6,80%), lo que representa el  52.13% del AE. El AE  de Cryptocarya alba parece prometedor como un insecticida natural contra la mosca doméstica.  Palabras clave: Musca domestica; Cryptocarya alba; composición del aceite esencial; CG-EM; RMN; insecticida natural.  Recibido | Received: January 10th, 2015 Aceptado | Accepted: January 15th, 2015 Aceptado en versión corregida | Accepted in revised form: March 2th, 2015 Publicado en línea | Published online: March 30th, 2015 Declaración de intereses | Declaration of interests: Financial support for this work was provided by Universidad de Santiago de Chile (USACH), DICYT, 020941UM, FONDEF D08I1102 and VRIDEI-DICYT- 021341UM_POSTDOC Rocío Santander. Este artículo puede ser citado como / This article must be cited as: D Di Cosmo, R Santander, A Urzúa, SM Palacios, Y Rossi. 2015. Insecticidal effect of Cryptocarya alba essential oil on the housefly, Musca domestica L. Bol Latinoam Caribe Plant Med Aromat 14 (2): 113 – 117.  Di Cosmo et al. Insecticidal effect of C. alba essential oil on the housefly, Musca domestica   Boletín Latinoamericano y del Caribe de Plantas Medicinales y Aromáticas/114 INTRODUCTION In our continuing interest in the potential of essential oils (EO's) from Chilean flora as insecticides against Musca domestica (Urzúa et al., 2010a; Urzúa et al., 2010b; Urzúa et al., 2011; Urzúa et al., 2013), we present an evaluation of the insecticidal property of a widespread species endemic to the sclerophyllous forest in Central Chile, Cryptocarya alba (Mol.) Looser (Lauraceae) (Riedeman & Aldunate, 2001). In addition to being a medicinal plant with several curative properties (Muñoz et al., 1981), a key factor in its selection was that the spices-scented leaves of C. alba and their essential oil  shows insecticidal properties against the maize weevil; Sitophilus zeamais Motschulsky (Guerrero, 2013).  EXPERIMENTAL  General cis-β-Terpineol; 1-terpineol;  α-pinene; β-pinene; α-terpineol and 4-terpineol,  were purchased from Sigma-Aldrich (St. Louis, MO, USA). Dimethyl-2,2-dichlorovinyl phosphate (DDVP) was provided as a gift by Professor H. Masuh from the Center of Investigation on Pests and Insecticides, CONICET, Argentina. The essential oil component analysis was performed using gas chromatography (GC) and gas chromatography/mass spectroscopy (GC/MS). Qualitative analysis was performed using a Thermo Scientific Trace GC Ultra linked to a ISQ quadrupole mass spectrometric detector with an integrated data system (Xcalibur 2.0, Thermo Fisher Scientific Inc. USA); quantitative analysis was carried out using a Shimadzu GC-9A gas chromatograph fitted with a FID-9 detector (Shimadzu Corporation, Kyoto, Japan). The same capillary column (Rtx-5MS, film thickness 0.25 μm, 60m x 0.25 mm, Restek  Corporation, Bellefonte, PA. USA) was used in both instruments.   Plant material Leaves of Cryptocarya alba were collected at Cuesta Lo Prado (33°28´S, 70°56´W, 750 m above sea level) 15 km west of Santiago, during the flowering season, November 2010. Voucher specimens were deposited in the Herbarium of the National Natural History Museum, Santiago, Chile.   Essential oil extraction and analysis Essential oil was extracted from 300 g of fresh leaves for 4 h by hydro distillation (2.5 L, H2O) in a Clevenger-type apparatus. The EO was dried over anhydrous sodium sulfate and stored at -20º C until analysis. The EO component analysis was performed by gas chromatography (GC) and gas chromatography/mass spectrosmetry (GC/MS) using the instrumentation described above. The operating conditions were as follows: on-column injection; injector temperature, 250° C; detector temperature, 280° C; carrier gas, He at 1.25 ml/min; oven temperature program: 40 ºC for 5 min, increase to 260º C at 5º C/min, and then 260º C for 5 min. The mass detector ionization employed an electron impact of 70 eV. Recording conditions employed a scan time of 1.5 s and a mass range of 40 to 400 amu. Compounds in the chromatograms were identified by comparison of their mass spectra with those in the NIST08 library database, and by comparison of their retention index with those reported in the literature (Adams, 2007),  for the same type of column or those of commercial standards, when available.   Fly collection and maintenance The colonies of M. domestica used in this study originated from adults collected in the experimental field of the Universidad Católica of Córdoba, in Córdoba, Argentina, using a sweep net. The flies were transferred to a small cage and then reared in entomological cages (30×30×30 cm) at 26 ± 1° C under a 12:12 light: dark cycle and 70% humidity. Adult flies were provided with water and fed a 1:1 (v/v; approximately) mixture of granulated sugar and powdered milk. Bran and milk were prepared at a weight ratio of 1:3 and 100 g of this mixture was placed on a plastic plate as an oviposition site.   Bioassay The bioassay was designed so the flies would have high probability of coming into contact with volatile compounds within the one hour test period; therefore, the flies were allowed access to the total space within the exposure vessel. Ten 4-5 day old adult house flies, of both sexes, were placed in a glass jar (1.2 dm3) fitted with a screw cap that had a 7-cm length of cotton yarn suspended from the center of its inner face. Different dosages of pure EO (without solvent) were applied to the yarn. The control vessel had no compound on the cotton yarn. The jars were sealed tightly and maintained at temperature of 26 ± 1° C. Each test was repeated three times. The assay was also conducted with the cotton yarn enclosed in a breathable cloth bag to prevent direct contact. Dimethyl 2, 2-dichlorovinyl phosphate (DDVP), a Di Cosmo et al. Insecticidal effect of C. alba essential oil on the housefly, Musca domestica   Boletín Latinoamericano y del Caribe de Plantas Medicinales y Aromáticas/115 volatile organophosphate, was used as a positive control. Mortality in each group was assessed after one hour of exposure.  Data analysis The mean mortality data of the three repeated assays per dose (4-6 doses) was used to calculate the LC50. Probit analysis (Harvard Programming; Hg1, 2) was used to analyze the dose-mortality response.   RESULTS AND DISCUSSION From the fresh leaves of C. alba (300 g), 0.5 g (0.17%) of EO was obtained. The composition of the EO is listed in Table 1. 4-Terpineol (17.48%); 4- (3,3-dimethyl-but-1-ynyl)-4-hydroxy-2,6,6-trimethyl-cyclohex-2-enone (12.84%); 1,8-cineole (7,90%) [3]; p-cymene (7.11%) and sabinene (6.80%) , were the principal components of C. alba EO.       Table 1 Composition of the essential oil of leaves of Cryptocarya alba  Compound RI % Identification Compound RI % Identification hexanal * 802 0.37 RI,MS α-terpineol * 1203 1.04 RI,MS,Co-I 3-hexenol * 862 0.42 RI,MS myrcenal * 1213 0.27 RI,MS α-thujene* 931 0.32 RI,MS trans-piperitol 1220 0.17 RI,MS α-pinene* 940 2.30 RI,MS,Co-I α-cubebene 1366 0.40 RI,MS camphene* 958 0.29 RI,MS α-copaene 1395 0.48 RI,MS sabinene * 981 6.80 RI,MS β-elemene 1409 0.58 RI,MS β-pinene * 985 1.53 RI,MS,Co-I methyleugenol 1414 0.53 RI,MS β-myrcene * 994 0.46 RI,MS Caryophyllene 1445 0.14 RI,MS p-cimene 1034 7.11 RI,MS α-bergamotene 1452 0.55 RI,MS 1,8 cineol 1042 7.90 RI,MS,Co-I, NMR. β-farnesene 1465 0.42 RI,MS linalol * 1104 1.71 RI,MS α-caryophyllene 1480 0.19 RI,MS cis-β-terpineol 1133 0.33 RI,MS,Co-I α-muurolene 1522 0.33 RI,MS 1-terpineol 1152 0.20 RI,MS,Co-I α-amorphene 1539 0.21 RI,MS trans-pinocarveol * 1155 0.25 RI,MS calamalene 1548 2.67 RI,MS 2-nonenal 1167 0.68 RI,MS viridiflorol 1599 0.30 RI,MS 1,4 cineol 1179 2.05 RI,MS 4-(3,3-Dimethyl-but-1-ynyl)-4-hydroxy-2,6,6-trimethylcyclohex-2-enone 1613 12.84 RI,MS,NMR β-terpineol 1185 3.15 RI,MS caryophyllene oxide 1617 1.19 RI,MS 4-terpineol * 1192 17.48 RI,MS,Co-I, NMR. cubenol 1657 0.60 RI,MS ρ-cimen-8-ol 1196 0.40 RI,MS α-cadinol 1670 0.65 RI,MS  RI: Retention index; MS: Mass spectrum; Co-I: Standard; NMR: Nuclear magnetic resonance; *Also identified in Montes et al., 1988.  Di Cosmo et al. Insecticidal effect of C. alba essential oil on the housefly, Musca domestica   Boletín Latinoamericano y del Caribe de Plantas Medicinales y Aromáticas/116   Figure 1 Principal terpenoids in the essential oil of Cryptocarya alba and abscisic acid   As far as we can determine, the composition of only one EO sample from C. alba have been investigated. Montes et al., 1988, reported 72 compounds with 4-terpineol; 1, 8-cineole; p-cymene; α-pinene; limonene and β-pinene as the major compounds. The most important differences with our results is the absence of 4- (3, 3-dimethyl-but-1-ynyl) -4-hydroxy-2, 6, 6-trimethylcyclohex-2-enone. In addition a direct comparison is difficult as Montes et al., 1988 did not report retention indices (RI) and the component identification of essential oils using only the GC-MS equipment database should  be considered  tentative (Adams, 2007).  Additionally, using 1H and 13C NMR studies of the EO was possible to confirm the three major components: 4-terpineol; 4- (3, 3-dimethyl-but-1-ynyl) -4-hydroxy-2, 6, 6-trimethylcyclohex-2-enone and 1, 8-cineole. For 4-terpineol and 1, 8-cineol, the assignment was performed using spectroscopic data published in the literature (Swigar & Silverstein, 1981). For 4- (3, 3-dimethyl-but-1-ynyl) -4-hydroxy-2, 6, 6-trimethylcyclohex-2-enone, the experimental chemical shifts were compared with spectroscopic data published in the literature for abscisic acid and derivatives (Milborrow, 1984).   The fumigant effects of EO against adult M. domestica were evaluated by determining the LC50 values, which are presented in Table 2.  Table 2 LC50 of Cryptocarya alba essential oil on Musca domestica ________________________________________________________    Time (h)   Mean LC50 in mg/dm3 (95%CI) 0.5    33.56 (7.06 - 159.50) 1.0    15.07 (5.29 -   42.91) ________________________________________________________ Time: 1 h; t: 26 ± 1º C  Di Cosmo et al. Insecticidal effect of C. alba essential oil on the housefly, Musca domestica   Boletín Latinoamericano y del Caribe de Plantas Medicinales y Aromáticas/117 The insecticidal properties of some monoterpenoids have been determined using the same bioassay, and the LC50 in a 0.5 h experiment were 3.35 mg/dm3 for 1,8-cineol, 12.1 mg/dm3 for α- pinene and 36.8 mg/dm3 for 4-terpineol (Palacios et al., 2009). Although the insecticidal properties of an essential oil may be related in principle to its individual components, in this case no correlation was possible because the C. alba EO contains many components in low proportion.   ACKNOWLEDGEMENTS Financial support for this work was provided by Universidad de Santiago de Chile (USACH), DICYT, 020941UM, FONDEF D08I1102 and VRIDEI-DICYT- 021341UM_POSTDOC Rocío Santander.  REFERENCES Adams PR. 2007. Identification of essential oil  components by gas chromatogram- phy/mass Spectrometry, 4th. Ed. Allured  Publishing Corp. Illinois USA. Guerrero JJP. 2013. Actividad insecticida de polvo  y aceite esencial de Cryptocarya alba  Molina sobre Sitophilus zeamais  (Motschulsky). Monografía, Facultad de  Agronomía, Universidad de Concepción,  Chile. Milborrow BV. 1984. The conformation of  abscisic acid by NMR and a revision of  the  proposed mechanism for cyclization  during its biosynthesis. Biochem J 220:  325 - 332. Montes M, Valenzuela T, Wilkomirsky T,  Sanguinetti A, Von Baer D. 1988.  Etude de la composition de l’huile  essentielle de Cryptocarya alba  (Mol) Looser (Lauraceae) du Chili. Ann  Pharm Fr 46: 41 - 47. Muñoz M, Barrera E, Meza I. 1981. El uso  medicinal y alimenticio de plantas nativas y  naturalizadas en Chile. Museo Nacional de  Historia Natural. Publicación Ocasional  33: 3 - 89. Palacios SM. Bertoni A. Rossi Y. Santander R.  Urzúa A. 2009. Efficacy of essential oils  from edible plants as insecticides against  the house fly, Musca domestica L.  Molecules 14: 1938 - 1947. Riedeman P. Aldunate G. 2001. Flora nativa de  valor ornamental Identificación y  Propagación, Chile Zona Centro. Editorial  Andrés Bello. Chile. Swigar AA,  Silverstein RM. 1981. Monoterpenes:  infrared, mass, 1H  NMR, and 13C NMR  spectra, and                  Aldrich  Chemical Co. Milwaukee, Wisconsin, USA.  Urzúa A, Santander R, Echeverría J, Villalobos C,  Palacios SM, Rossi Y. 2010a. Insecticide  properties of the essential oils from  Haplopappus foliosus and Bahia  ambrosoides against the house fly, Musca  domestica L. J Chil Chem Soc 55: 392 -  395.  Urzúa A, Santander R, Echeverria J, Villalobos C,  Palacios SM, Rossi Y. 2010b. Insecticidal  properties of Peumus boldus Mol. essential  oil on the house fly, Musca domestica L.  Bol Latinoam Caribe Plant Med Aromat  9: 465 - 469. Urzúa A, Di Cosmo D, Santander R, Echeverria J,  Palacios SM, Rossi Y. 2011. Insecticidal  Effect of Schinus latifolius Essential Oil on  the Housefly, Musca domestica L. Bol  Latinoam Caribe Plant Med Aromat 10:  470 - 475. Urzúa A, Modak B, Santander R, Heit C, Echeverría  J. 2013. Insecticidal properties of Heliotro- pium stenophyllum essential oil on the House  fly, Musca domestica L. Bol Latinoam  Caribe Plant Med Aromat 12: 196 - 200. 

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Insecticidal effect of Cryptocarya alba essential oil on the housefly, Musca domestica L.

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The composition of the essential oil (EO) from Cryptocarya alba obtained by hydro distillation of fresh leaves was analyzed using gas chromatography (GC) and gas chromatography/mass spectros metry (GC/MS). The insecticidal effect of the oil on the hous e fly Musca domestica was evaluated by placing flies in a sealed glass jar containing a piece of EO - treated cotton yarn. The dose necessary to kill 50% of flies (LC 50 ) in 0.5 and 1 h was determined at 26 ± 1 °C. The essential oil from Cryptocarya alba show ed significant insecticidal p roperties [33.56 (7.06 - 159.50) mg/dm 3 (0.5 h) and 15.07 (5.29 - 42.91) mg/dm 3 (1 h)]. According to GC and GC/MS analysis a total of 38 compounds were identified. The composition of the Cryptocarya alba essential oil reported in t his study is different to that reported in other publications with 4 - terpineol (17.48%) ; 4 - (3,3 - dimethyl - but - 1 - ynyl) - 4 - hydroxy - 2,6,6 - trimethylcyclohex - 2 - enone (12.84%); 1,8 - cineole (7.90%); p - cymene (7.11%) and sabinene (6.80%), accounting for 52.13% o f the EO. The EO from Cryptocarya alba appears promising as a natural insecticide against houseflies.Fil: Di Cosmo, Dania. Universidad de Santiago de Chile. Facultad de Química y Biología; ChileFil: Santander, Rocío. Universidad de Santiago de Chile. Facultad de Química y Biología; ChileFil: Urzúa, Alejandro. Universidad de Santiago de Chile. Facultad de Química y Biología; ChileFil: Palacios, Sara María. Universidad Católica de Córdoba. Facultad de Ciencias Químicas; ArgentinaFil: Rossi, Yanina. Universidad Católica de Córdoba. Facultad de Ciencias Químicas; Argentin

Santander, Rocío

Palacios, Sara María

Rossi, Yanina

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Insecticidal effect of Cryptocarya alba essential o il on the housefly, Musca domestica L

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Insecticidal effect of Cryptocarya alba essential oil on the housefly, Musca domestica L.

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