Abstract: -【Aim】Tuta absoluta is a newly invaded devastating pest on tomatoes in China, and poses a significant threat to tomato production. Olfactory behavior manipulation technique is an important component of the green control techniques of T. absoluta. By exploring the effects of the components of floral scents, tomato plant volatiles and volatiles from traditional food baits (fermented sugar water and sugar vinegar solution) on the behavior of T. absoluta, this study aims to provide a reference for the development of olfactory behavior manipulation technique for this pest. 【Methods】First, the electroantennogram (EAG) response experiments were carried out to assay the EAG responses of the female and male adults of T. absoluta to 24 compounds including nine compounds of floral scents ［linalool, methyl o-anisate, ethyl hexanoate, cis-jasmone, (-)-limonene, phenylacetaldehyde, β-myrcene, methyl salicylate and ethyl benzoate］, four components of tomato plant volatiles (octyl acetate, catechol, resorcinol and hydroquinone), 11 volatile compounds of from traditional food baits (2-ethyltoluene, decanal, ethyl decanoate, 3-furaldehyde, 1, 2-diethylbenzene, ethyl heptanoate, ethyl octanoate, n-propylbenzene, ethyl nonanoate, benzaldehyde and 1, 4-diethylbenzene) at the doses of 1, 10， 100 and 1 000 μg. Then, the olfactory behavior responses were determined with Y-tube olfactometer to test the attractiveness of 12 compounds screened out by the above experiments with high EAG responses at the doses of 1, 10, 100 and 1 000 μg to the female and male adults of T. absoluta. Finally, the oviposition selection behavior was determined with cage experiments to test the oviposition attraction effects of six effective attractants screened out by the above tests on the female adults of T. absoluta. 【Results】 Twelve volatile compounds, including linalool（10, 100 and 1 000 μg）, decanal（1, 10, 100 and 1 000 μg）, methyl o-anisate（10, 100 and 1 000 μg）, octyl acetate（10, 100 and 1 000 μg）, 3-furaldehyde（1, 10, 100 and 1 000 μg）, ethyl heptanoate（10, 100 and 1 000 μg）, phenylacetaldehyde（10, 100 and 1 000 μg）, resorcinol（1, 10, 100 and 1 000 μg）, methyl salicylate（1, 10, 100 and 1 000 μg）, hydroquinone（1, 10, 100 and 1 000 μg）, ethyl benzoate（1, 10, 100 and 1 000 μg） and 1,4-diethylbenzene（100 and 1 000 μg） elicited high EAG responses in both female and male adults of T. absoluta. Results from the olfactometer bioassay indicated that six compounds including decanal(10 μg), ethyl heptanoate(10 and 1 000 μg), octyl acetate(100 μg), resorcinol(10 μg), methyl salicylate(1 000 μg), and ethyl benzoate(100 and 1 000 μg) had attraction effects on T. absoluta adults, with decanal(10 μg), ethyl heptanoate(10 and 1 000 μg), resorcinol(10 and 1 000 μg) and ethyl benzoate(100 and 1 000 μg) showing significant attraction to female or male adults, and decanal(10 μg) and ethyl benzoate(100 μg) exhibiting bisexual attraction effects at the same dose. Oviposition selection results demonstrated that decanal (10  μg), ethyl heptanoate (100 μg), octyl acetate (1 000 μg), resorcinol (10 μg), methyl salicylate (1 000 μg), and ethyl benzoate (1 000 μg) showed significant oviposition attractiveness to female adults of T. absoluta. 【Conclusion】 Six volatile compounds including decanal, ethyl heptanoate, octyl acetate, resorcinol, methyl salicylate and ethyl benzoate show significant attractive and oviposition stimulant activities to T. absoluta adults, and decanal and ethyl benzoate have the potential to be developed as bisexual attractants. These results provide references for the development of green control techniques for T. absoluta.

Key words: Tuta absoluta; attractants, tomato plant volatiles, sugar vinegar solution, fermented sugar water, floral scents