D-Limonene Is the Active Olfactory Attractant in Orange Juice for _Bactrocera dorsalis_ (Insecta: Diptera: Tephritidae)  
[PERSON]  
1 College of Plant Health & Medicine, Qingdao Agricultural University, Qingdao 266071, China; [EMAIL_ADDRESS] (L.L. ); [EMAIL_ADDRESS] (H.Z.) [PERSON]  
2 Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests/Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs/Plant Protection Research Institution, Guangxi Academy of Agricultural Sciences, Nanning 530007, China; [EMAIL_ADDRESS]  
[PERSON]  
Guangdong Laboratory of Lingnan Modern Agriculture, Key Laboratory of Synthetic Biology, Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, China; [EMAIL_ADDRESS]  
Zheng  
fruit, including mangoes, cherries, guavas, loquats, papayas, and citrus fruits, posing a significant threat to agricultural production [3; 4]. Since fruit acts as a protective barrier for borer pests, the effectiveness of contact chemical pesticides is limited. The frequent use of chemical pesticides has caused the development of resistance to organophosphorus insecticides, avermectins, and pyrethroids [5; 6; 7], producing environmental pollution and human health issues. Semiochemical-based technology is an environmentally friendly pest control method, which employs the relationship between plants and pests mediated by plant volatiles for pest control, leading to the development of various behavior-modifying chemical-based techniques, such as trapping plants and food attractants [8]. Among these techniques, food attractants are biologically based traps that are artificially synthesized and chemically formulated according to the scent of plant stems, leaves, fruits, and other foods. They generally have attractive influences on male and female pests. With the progress in chemical analysis technology and insect olfactory electrophysiological technology, our comprehension of the food odor of pests is constantly deepening. This has caused the development of novel food attractants for pests, including true flies, nocturnal moths, and beetles, through the food volatiles preferred by insects. These attractants have been widely employed globally [1; 9]. Behavior-modifying chemicals, including attractants, are important for controlling _B. dorsalis_. Male attractants and intersex protein baits are the most common among these chemicals, producing two control strategies: MAT and BAT [10]. Methyl eugenol is a potent male attractant for _B. dorsalis_ that could even eradicate the entire pest population on a small island (e.g., Nauru) [10]. However, its application is limited due to its carcinogenic effect in human cell experiments [11; 12] and its inability to control females. Protein baits are less effective than male attractants, but they have also been utilized in the control of fruit flies due to their ability to attract female insects. They can be used in combination with male attractants [10], but they can also attract non-target insects [13]. Therefore, there is an urgent requirement to explore more potential attractant resources to improve the effectiveness of existing attractant compounds. The host is key as an attractant for fly pests, so it is essential to further explore it as a resource for identifying more active attractant substances. For instance, the host volatiles of _B. cucumis_, _R. pomonella_, _R. mendax_, and _R. cingulata_ strongly attract these pests [14; 15; 16; 17], and some of these volatiles have been effective in controlling these pests [18]. _Citrus sinensis_ is one of the primary hosts of _B. dorsalis_[19]. Compared to other hosts like guava and papaya, its juice has a strong attraction and oviposition effect on _B. dorsalis_[20]. Additionally, it is often used as a medium for egg collection in the indoor populations of _B. dorsalis_[21]. However, its specific behaviorally active components remain unclear.