Abstract
This paper studied the fumigating activity of Litsea cubeba oil and citral on Solenopsis invicta, identified and analyzed the chemical constituents and volatile components of L. cubeba oil via solid-phase microextraction which were then identified via gas chromatography-mass spectrometry. The results showed that citral and (z)-3,7-dimethylocta-2,6-diena were the main components of L. cubeba oil, as well as its volatile compounds. According to the experimental results, L. cubeba oil and citral had good fumigating activity on workers, and also had significant inhibition on the walking ability and climbing ability of workers. At the same time, the effects of the two agentia on the fumigating activity and behavioral inhibition of microergate were stronger than those of macroergate. After treating with L. cubeba oil and citral for 24 hours, the walking rate and grasping rate of microergate were both 0 %. The results showed that L. cubeba oil and citral had good control effect on S. invicta.
Highlights
IntroductionSolenopsis invicta (red imported fire ant, RIFA) is an invasive pest native to South America (Dai, 2015)
Solenopsis invicta is an invasive pest native to South America (Dai, 2015)
Our results showed that L. cubeba oil and citral can be used to control RIFA
Summary
Solenopsis invicta (red imported fire ant, RIFA) is an invasive pest native to South America (Dai, 2015). It is widely distributed in China, the USA, New Zealand, Australia, and other parts of the world (Ascunce et al, 2011). RIFA is considered as one of the 100 most dangerous invading pests in the world. Chemical control is the most widely used method. Chemical insecticides can achieve good control effect in a short time, they bring a series of problems, such as environmental pollution, impact on human and non-target organisms, and emergence of insecticide resistance (Gao, 2010). In order to solve these problems, it is necessary to search for natural substances that are nontoxic to non-target organisms and can rapidly degrade in natural environment
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