When you think of how insecticides work you think killing the pest and for most synthetic pesticides that would be true, we will discuss 6 ways natural essential oil insecticides control pests.
Synthetic insecticide such as pyrethroid, neonicatenoids, carbomates, and organophosphates work with specific modes of action to kill a pest like blocking a sodium Channel keeping it open creates an uncontrollable influx of sodium rushing the system causing excitation, tremors and paralysis leading to death.
Unlike synthetic insecticide that only have one active ingredient with one mode of action, natural essential oil insecticides have many components, derivatives and active ingredients that control and prevent insects, nematodes, fungi, mold and bacterias on plants and properties.
Essential oil insecticides have complex chemical compositions
Acorus calamus essential oil have identified and quantified 32 major components.
α-Pinene, Camphene, β-Pinene, (D)-Limonene, 1,8-Cineol, Linalool, Camphor, Terpinen-4-ol, α-Terpineol, Estragole, Bornyl acetate, Copaene, α-Funebrene, α-Gurjunene, α-Cedrene, α-Bulnesene, Methyleugenol, β-Cedrene, β-Caryophyllene, α-Caryophyllene, (E)-Methylisoeugenol, Germacrene, D Cuparene, α-Cadinene ,β-Calacorene, Germacrene, B β-Asarone, α-Cadinol, α-Asarone, Acorenone , α-Bisabolol, Acorone.
Source: Identification of Insecticidal Constituents of the Essential Oil of Acorus calamus Rhizomes against Liposcelis bostrychophila Badonnel
Natural Essential Oil Insecticide Modes of Actions
Adulticidal Action of Essential oil insecticides
Natural chemical components act as both repellents and insecticides, but how they function in either capacity is still largely unknown. A commercial insecticide developed for vector control of mosquitoes using thymoquinone, nootkatone, or carvacrol would be extremely beneficial.
Source: Mode of Action for Natural Products Isolated From Essential Oils of
Two Trees Is Different From Available Mosquito Adulticides
Anti-feeding action of Essential oil insecticides
Anti-feeding action of the chemical compound Toosendanin, a tetranortriterpenoid isolated from the bark of Meli. The Anti feeding action is caused by using electrophysiological techniques stimulating the deterrent receptor cell inhibiting the responses of both the sugar and glucosinolate receptor cell. The degree of inhibition of the sugar receptor increases with increasing sucrose concentration. The glucosinolate receptor cell shows a reversed reaction: inhibition by toosendanin decreases with increasing sinigrin concentration.
Source: Composition and toxic, repellent and feeding deterrent activity of essential oils against the stored-grain pests Tribolium castaneum (Coleoptera: Tenebrionidae) and Sitophilus oryzae (Coleoptera: Curculionidae).
Ovicidal and oviposition action of Essential oil insecticides
The ovicidal killing of eggs and oviposition depositing of eggs of essential oils where evaluated against the mosquito Culex quinquefasciatus Say. Ten oils where tested in the study aniseed, calamus, cinnamon oil, citronella, clove oil, lemon, orange, thyme, tulsi and vertiver.
All essential oils used in the study reduced the egg hatching of mosquito eggs. Anis and Clove oil was toxic to all stages of life.
Source: Ovicidal and oviposition response activities of plant volatile oils against Culex quinquefasciatus say.
Egg Hatching Inhibitor action of Essential oil insecticides.
The chemical composition of the essential oil of three plants and to evaluate their biological activity against eggs, larvae, and adult insects of Carob moth Ectomyelois ceratoniae Zeller on date palm (Phoenix dactylifera L.) Spanish oregano Thymus capitatus essential oil displayed the most effective activity and toxic effect against date moth.
Repellent action of Essential oil insecticides in Mosquitoes
Botanical compounds contain a broad range of chemical active ingredients which are naturally occurring can intervene in all biological processes of the mosquito and interrupt the mosquitoes’ life cycle and dispersal and reduce harms to humans and animals.
Source: Essential Oil Repellents- A short Review
Neurotoxin action of Essential oil insecticides
53 plant essential oils were tested for their insecticidal activities against eggs, nymphs, and adults of Trialeurodes vaporariorum Westwood
Source: Toxicity of Plant Essential Oils to Trialeurodes vaporariorum (Homoptera: Aleyrodidae)
Larvicidal action of Essential oil insecticides
A study on larvicidal action against the Anopheles cracens mosquito reveals that five of ten plant oils showed 95–100% larval mortality.
Source: Source: Chemical Constituents and Combined Larvicidal Effects of Selected Essential Oils against Anopheles cracens (Diptera: Culicidae)
Our natural pest control service and programs are backed by hundreds of scholarly studies published from around the world on all types of pests and with over 5 years of research and development we have been successfully using natural products to control of a large variety garden pests, fleas, ticks and mosquitoes.