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Evaluation of larvicidal activity of the essential oil of Ageratum conyzoides L. aerial parts and its major constituents against Aedes albopictus
Xin Chao Liu,Zhi Long Liu +1 more
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TLDR
The present findings indicated that the essential oil of A. conyzoides aerial parts and two major constituents have potential for use in control of Ae.Abstract:
During our mass screening program for new agrochemicals from the wild plants and Chinese medicinal herbs, essential oil of Ageratum conyzoides L. (Compositae)aerial parts at flowering stage exhibited strong larvicidal activity against the Asian tiger mosquito, Aedes albopictus. Essential oil of A. conyzoides aerial parts was obtained by hydrodistillation and analyzed by GC and GC-MS. A total of 32 components of the essential oil were identified and the principal compounds in the essential oil were precocene II (45.75%), precocene I (14.09%), and caryophyllene (12.13%) followed by germacrene D (4.18%) and caryophyllene oxide (4.06%). The essential oil had higher content (59.84%) of phenylpropanoids than monoterpenoids (3.70%) and sesquiternoids (33.01%). The essential oil of A. conyzoides aerial parts exhibited larvicidal activity against Ae. albopictus with an LC50 value of 61.22 μg/ml while the two major constituents, precocene I and precocene II had LC50 values of 43.55 μg/ml and 41.63 μg/ml, respectively. The present findings indicated that the essential oil of A. conyzoides aerial parts and two major constituents have potential for use in control of Ae. albopictus larvae and could be useful in search of newer, safer and more effective natural compounds as larvicides.read more
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High efficacy of (Z)-γ-bisabolene from the essential oil of Galinsoga parviflora (Asteraceae) as larvicide and oviposition deterrent against six mosquito vectors.
Marimuthu Govindarajan,Baskaralingam Vaseeharan,Naiyf S. Alharbi,Shine Kadaikunnan,Jamal M. Khaled,Mohammed N. Al-anbr,Sami AlYahya,Filippo Maggi,Giovanni Benelli,Giovanni Benelli +9 more
TL;DR: The oviposition deterrent potential of the G. parviflora EO and (Z)-γ-bisabolene was studied on six mosquito vectors, showing that 25 μg/ml of (Z), led to an Oviposition Activity Index lower of − 0.79 in all tested mosquito vectors.
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Physiological Activities of Anti-Juvenile Hormone Agents Against Insects and Their Role For Devising Fourth Generation Insecticides: A Comprehensive Review
Karem Ghoneim,Reda F. A. Bakr +1 more
TL;DR: An updated overview of different categories of compounds possessing anti-JH activity and their effects on survival, growth, development, metamorphosis, and reproduction of several insects of different orders is presented.
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Morpho-anatomical study of Ageratum conyzoides
Rafaela Ferreira Santos,Barbara M. Nunes,Rafaela Barros de Sá,Luiz Alberto Lira Soares,Karina Perrelli Randau +4 more
TL;DR: Ageratum conyzoides L., belonging to the family Asteraceae, is a tropical plant found in some regions of Africa, Asia and South America and has a large variety of secondary metabolites and biological activities mentioned in the literature.
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Methanolic extract of Agerantum conyzoides exhibited toxicity and growth disruption activities against Anopheles gambiae sensu stricto and Anopheles arabiensis larvae
TL;DR: The extract displayed considerable larvicidal activity and inhibited emergence of adult mosquitoes relative to experimental controls, a phenomenon probably associated with induced developmental hormone imbalance.
Journal ArticleDOI
Chemical Composition of Salvia plebeian R.Br. Essential Oil and its Larvicidal Activity against Aedes aegypti L
TL;DR: The findings indicate that the essential oil of S. plebeian aerial parts has potentials for use in the control of A. aegypti larvae and may be useful in the search for newer, safer and more effective natural compounds as larvicides.
References
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Volatiles of Inflorescences, Leaves, Stems and Roots of Ageratum conyzoides L. growing Wild in the North of Brazil
Maria das Graças B. Zoghbi,Maria de Nazaré do Carmo Bastos,Mário Augusto Gonçalves Jardim,José Roberto Trigo +3 more
TL;DR: The obtained data showed the occurrence at least two chemotypes of A. conyzoides in Pará: the typerich in precocene I, comparable to the oils from Cameroon, Ghana and Burkina Faso, and Southeast of Brazil, and the type rich in α-pinene/germacrene D.
A new natural pyrrolone from the Egyptian Ageratum species
TL;DR: In continuation of the authors' interest in the Egyptian medicinal plants, the reinvestigation of the methylenechloride extract of the air‐dried aerial parts of N.L., is to be reinvestigated.