(1S)-(-)-Alpha-Pinene
(1S)-(-)-Alpha-Pinene has insecticidal activity, it shows toxic against fourth‐instar larvae of the mosquito Culex pipiens molestus Forskal.
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Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to
24 months(2-8C).
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20C. Generally, these will be useable for up to two weeks. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.
Need more advice on solubility, usage and handling? Please email to: service@chemfaces.com
The packaging of the product may have turned upside down during transportation, resulting in the natural compounds adhering to the neck or cap of the vial. take the vial out of its packaging and gently shake to let the compounds fall to the bottom of the vial. for liquid products, centrifuge at 200-500 RPM to gather the liquid at the bottom of the vial. try to avoid loss or contamination during handling.
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Pest Management ence, 2002, 58(5).
Insecticidal properties of essential plant oils against the mosquito Culex pipiens molestus (Diptera: Culicidae).[Reference:
WebLink]
METHODS AND RESULTS:
The insecticidal activities of essential oil extracts from leaves and flowers of aromatic plants against fourth‐instar larvae of the mosquito Culex pipiens molestus Forskal were determined. Extracts of Myrtus communis L were found to be the most toxic, followed by those of Origanum syriacum L, Mentha microcorphylla Koch, Pistacia lentiscus L and Lavandula stoechas L with LC50 values of 16, 36, 39, 70 and 89 mg litre−1, respectively.
CONCLUSIONS:
Over 20 major components were identified in extracts from each plant species. Eight pure components (1,8‐cineole, menthone, linalool, terpineol, carvacrol, thymol, (1S)-(-)-Alpha-Pinene and (1R )‐(+)‐α‐pinene) were tested against the larvae. Thymol, carvacrol, (1R )‐(+)‐α‐pinene and (1S )‐(−)‐α‐pinene were the most toxic (LC50 = 36–49 mg litre−1), while menthone, 1,8‐cineole, linalool and terpineol (LC50 = 156–194 mg litre−1) were less toxic.
