scholarly journals Toxicity of Rhododendron anthopogonoides Essential Oil and Its Constituent Compounds towards Sitophilus zeamais

Molecules ◽  
2011 ◽  
Vol 16 (9) ◽  
pp. 7320-7330 ◽  
Author(s):  
Kai Yang ◽  
Yu Xin Zhou ◽  
Cheng Fang Wang ◽  
Shu Shan Du ◽  
Zhi Wei Deng ◽  
...  
Keyword(s):  
Essential Oil ◽  
Sitophilus Zeamais

scholarly journals Insecticidal and repellent activity of the essential oil of Cinnamomum camphora var. linaloolifera Y. Fujita (Ho-Sho) and Cinnamomum camphora (L.) J Presl. var. hosyo (Hon-Sho) on Sitophilus zeamaisMots. (Coleoptera, Curculionedae)

2015 ◽  
Vol 17 (4 suppl 1) ◽  
pp. 769-773 ◽  
Author(s):  
R.L. CANSIAN ◽  
V. ASTOLFI ◽  
R.I. CARDOSO ◽  
N. PAROUL ◽  
S.S. ROMAN ◽  
...  
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Insecticidal Activity ◽  
Sitophilus Zeamais ◽  
Repellent Activity ◽  
Cinnamomum Camphora ◽  
Preference Index ◽  
Lethal Doses ◽  
Repellency Activity

ABSTRACT The aim of this work was to evaluate the insecticidal and repellency activity of the essential oil of Cinnamomum camphora var. linaloolifera Y. Fujita (Ho-Sho) and Cinnamomumcamphora (L.) J Presl.var. hosyo (Hon-Sho), against the Sitophilus zeamais in maize grains. The essential oils were obtained by hydrodistillation and analyzed by GC-MS.The insecticidal activity was determined by the toxicity of different concentrations of essential oils during 24 hours of contact with the insects, in the absence of feed substrate. The Bioassays of repellency were conducted with lethal doses (LD50,LD25,and LD12.5) obtained from insecticidal bioassay. In order to compare the treatments the preference index (PI) was employed. The analysis of the essential oils of Cinnamomum camphora leaves indicated 68% of camphor and 9% of linalool for the variation Hon-Sho and 95% of linalool to the variation Ho-Sho. The variation Ho-Sho presented greatest insecticidal activity than the variation Hon-Sho against the Sitophiluszeamais, with LD50 of 0.35 μL/cm2, whereas in the variation Hon-Sho the ratewas 0.48 μL/cm2. However, considering only the concentrations of linalool and camphor of Ho-Sho and Hon-Sho, the lethal doses’ evaluation of these compounds were similar. The values of the preference index ranged from -0.3 to -0.8 for thevariation Ho-Sho and -0.2 to -0.7 for the variation Hon-Sho. The essential oils evaluated in this work showed repellent activity against Sitophiluszeamais in vitro and in trials performed in mini-silos.

scholarly journals Essential oil of Lippia sidoides and its major compound thymol: Toxicity and walking response of populations of Sitophilus zeamais (Coleoptera: Curculionidae)

2018 ◽  
Vol 112 ◽  
pp. 33-38 ◽  
Author(s):  
Alexandre P. Oliveira ◽  
Abraão A. Santos ◽  
Alisson S. Santana ◽  
Ana Paula S. Lima ◽  
Carlisson R. Melo ◽  
...  
Keyword(s):  
Essential Oil ◽  
Sitophilus Zeamais ◽  
Lippia Sidoides

scholarly journals LEAF ESSENTIAL OIL FROM Croton pulegiodorus Baill SHOWS INSECTICIDAL ACTIVITY AGAINST Sitophilus zeamais Motschulsky

2019 ◽  
Vol 32 (2) ◽  
pp. 354-363
Author(s):  
TACIANA LOPES DA SILVA ◽  
CARLOS ROMERO FERREIRA DE OLIVEIRA ◽  
CLÁUDIA HELENA CYSNEIROS MATOS ◽  
CÉSAR AUGUSTE BADJI ◽  
RENILSON PESSOA MORATO
Keyword(s):  
Essential Oil ◽  
Insecticidal Activity ◽  
Sitophilus Zeamais ◽  
Resistance Ratio ◽  
Fumigant Activity ◽  
Leaf Essential Oil ◽  
Susceptibility Patterns ◽  
Lc50 And Lc90

ABSTRACT The present study aimed to assess the effects of the essential oil of Croton pulegiodorus Baill on eight populations of Sitophilus zeamais Motschulsky with different patterns of susceptibility to synthetic insecticides. Populations of S. zeamais were obtained from Sete Lagoas-MG, Jacarezinho-PR, Bom Conselho-PE, Garanhuns-PE, Jupi-PE, Lajedo-PE, São João-PE and Serra Talhada-PE. To estimate the lethal concentrations (LC50 and LC90) of oil for each population, fumigation tests were performed. The susceptibility of S. zeamais to the essential oil varied among populations. Garanhuns and Bom Conselho was considered the susceptibility patterns, presenting the lowest LC50 (3.40 μL L-1 of air) and LC90 (9.60 μL L-1 of air) for the essential oil, respectively. The population from Jupi exhibited the highest LC50 (14.49 μL L-1 of air) and LC90 (19.60 μL L-1 of air) for C. pulegiodorus. The resistance ratio ranged from 1.84 for the São João to 4.26 for the Jupi population. Thus, the essential oil of C. pulegiodorus showed fumigant activity, causing mortality in all S. zeamais populations used.

The Repellence of Aristolochia aff. orbicularis Roots against the Corn Borer Sitophilus zeamais

2001 ◽  
Vol 56 (7-8) ◽  
pp. 575-580 ◽  
Author(s):  
Joseph Rauscher ◽  
Rosa M. Guillén ◽  
Martha Albores-Velasco ◽  
Gilberto González ◽  
Otto Vostrowsky ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Essential Oil ◽  
Sitophilus Zeamais ◽  
Gas Chromatography Mass Spectrometry ◽  
Spectroscopic Methods ◽  
Repellent Effect ◽  
Corn Borer ◽  
Chromatography Mass Spectrometry ◽  
Total Oil

The repellence of Aristolochia aff. orbicularis root, a native of Xochipala, Guerrero, Mexico, to the corn borer Sitophilus zeamais (Coleoptera) was investigated. The essential oil was isolated from the aromatic root and its repellent effect was assessed. About 40 components of the oil were identified using gas chromatography-mass spectrometry and other spectroscopic methods. The repellence of the roots, the oil and the chromatography fractions were also evaluated. Some fractions had a higher repellence than the total oil

Essential oil of Ocotea odorifera: An alternative against Sitophilus zeamais

2013 ◽  
Vol 29 (2) ◽  
pp. 161-166 ◽  
Author(s):  
Altemir J. Mossi ◽  
Camila A. Zanella ◽  
Gabriela Kubiak ◽  
Lindomar A. Lerin ◽  
Rogerio L. Cansian ◽  
...  
Keyword(s):  
Essential Oil ◽  
Point Of View ◽  
Sitophilus Zeamais ◽  
Repellent Effect ◽  
Maize Weevil ◽  
Plant Oil ◽  
Synthetic Chemicals ◽  
Insect Mortality ◽  
Effect Level ◽  
Synthetic Pesticides

AbstractNowadays, the maize weevil Sitophilus zeamais—Motsch 1855 is the most relevant pest found during storage of maize grains. Aiming at protecting the agricultural crops, high amounts of synthetic pesticides are used around the world. In this sense, this work aimed at evaluating the insecticidal and repellent effect of essential oil of Ocotea odorifera (Vellozo) Rohwer (Lauraceae) (O. odorifera (sassafras)) leaves against the maize weevil in maize grains. The essential oil's chemical composition showed that sassafras contains camphor (43%) and safrole (42%) as major compounds. Our results show that sassafras oil was insecticidal and repellent to maize weevil. About 100% mortality was achieved using a concentration of 0.32 μl cm−2, after 24 h of exposure. The LD50 value was 14.1 μl or 0.09 μl cm−2 and the study of the effect on insect mortality at the lethal doses (LD50) showed that after 72 h mortality was 100%. The values of the preference index varied from −0.39 (0.065 μl cm−2) to −0.63 (0.659 μl cm−2), demonstrating that the plant oil presents repellent activity. The repellency bioassay simulating small bins showed the repellent effect level from 0.64 (0.36 μl cm−3) to 0.94 (2.9 μl cm−3). The essential oil of sassafras presented insecticidal and repellency against maize weevil. Although from an economical point of view synthetic chemicals are still more frequently used as repellents, natural products (essential oils) have the potential to provide efficient and safer repellents for humans and the environment.

scholarly journals Products derived from the leaves of Ocimum kilimandscharicum (Labiatae) as post-harvest grain protectants against the infestation of three major stored product insect pests

1995 ◽  
Vol 85 (3) ◽  
pp. 361-367 ◽  
Author(s):  
B. Jembere ◽  
D. Obeng-Ofori ◽  
A. Hassanali ◽  
G.N.N Nyamasyo
Keyword(s):  
Essential Oil ◽  
Insect Pests ◽  
Feeding Activity ◽  
Sitophilus Zeamais ◽  
Rhyzopertha Dominica ◽  
Adult Survival ◽  
Sitotroga Cerealella ◽  
Pest Species ◽  
Plant Materials ◽  
Oil Extract

AbstractThe bioactivity of materials from the leaves of Ocimum kilimandscharicum was tested against Sitophilus zeamais Mots chulsky (Coleoptera: Curculionidae), Rhyzopertha dominica (Fabricius) (Coleoptera: Bostrichidae) and Sitotroga cerealella (Olivier) (Lepidoptera: Gelechiidae) in maize and sorghum grains in the laboratory. Exposure of adults of the three insect species to dried ground leaves and essential oil extract of O. kilimandscharicum induced 100% mortality after 48 h. Fresh and dried whole leaves were not toxic to Sitophilus zeamais or R. dominica. Grains treated with dried ground leaves and essential oil extract caused significant reductions in the number of progeny and survival rate of all three pest species tested. There was no adult survival or progeny production in grains treated separately with each of the two materials at doses of 25.0 g (dried ground leaves) and 0.3 g (essential oil) per 250 g of grain, respectively. Unlike R. dominica and Sitotroga cerealella, grains treated with fresh leaves enhanced the feeding activity of Sitophilus zeamais. Ground leaves and the essential oil, however, protected the grains against feeding by all three species, resulting in lower weight loss and number of damaged seeds compared with untreated grains. All the plant materials were repellent to S. zeamais with the essential oil extract applied at 0.3 g/250 g of grain evoking the highest repellent action. There was, however, considerable variation in the repellency of the materials against R. dominica and Sitotroga cerealella. The results are discussed in terms of the efficacy of O. kilimandscharicum for protection against loss due to insects in traditional grain storage in developing countries.

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