For a long time, people have used a variety of chemical insecticides to control mosquitoes, but chemical insecticides will not only pollute the environment but also harm human health while killing mosquitoes. These factors have prompted people to seek for environmentally friendly and low-toxic pesticides. Eucalyptus essential oil is a natural insecticide with low toxicity and residue and little environmental impact when compared with traditional synthetic insecticides. Eucalyptus essential oil is extracted from fresh leaves of eucalyptus. The main chemical component of eucalyptus essential oil is 1,8-eucalyptus oil, which has a wide range of biological activities and has different degrees of control effects on bacteria, fungi, insects, nematodes, weeds and aphids.

1) Insecticidal action of eucalyptus essential oil

 

 

The essential oil of eucalyptus leaves has great significance as a natural insecticide. The essential oil of eucalyptus leaves has the functions of deodorization, insecticide, mosquito repellent and anti-infection. It is because eucalyptus essential oil emits a slight fragrance taste, which can not be tolerated by mosquitoes. And the molecular evaporation of eucalyptus essential oil is faster, so the range and effect of mosquito removal are very effective. It has been reported that eucalyptus essential oils can solve or reduce the resistance of pests. Khodadad Pirali-Kheirabadi et al. studied the acaricidal activity of alfalfa essential oil and the results showed that it had a good poisoning effect on adults of ring burdock. The experimental results showed that after 1 day and 6 days of adult larvae, the fatalities of 5% of the blue peony essential oil were 16.7% and 37.5% respectively. The longer the effective protection time of the essential oil of the eucalyptus leaves on the body, the better the repellent effect on the mosquitoes.

 

2) Antibacterial activity of eucalyptus essential oil

 

 

Many plant essential oils have bacteriostatic activity. Eucabiotics ( Eucalyptus essential oil ) contains a variety of phenolic substances, its hydrophobic components can directly act on the cell membrane, and accumulate on the bacterial bimolecular lipid membrane, occupying the space between fatty acid chains. This interaction causes a change in the conformation of the bacterial cell membrane structure, leading to liquefaction and expansion of the cell membrane,  membrane stability loss and membrane permeability enhanced, and exudation of important intracellular ions and contents, which can ultimately lead to bacterial cell death.

With its own powerful function, Eucalyptus essential oil will become one of the indispensable and effective essential oils in animal breeding. It has the effect of killing and inhibiting coccidia, aphids, nematodes, etc., and also has the role of killing and dispelling ectoparasites (mosquito, white pelicans, crickets, etc.). To a certain extent, it has a multi-use, and can greatly saving costs. The most important thing is the safety of eucalyptus essential oil, which is extract naturally. In Australia,eucalyptus is regarded as a gift of nature. We believe that the use of eucalyptus essential oil will greatly improve the breeding efficiency!