| Title: | Behavioural and Electrophysiological Response of Anastrepha fraterculus (Diptera: Tephritidae) to a gamma-Lactone Synthetic Semiochemical |
| Author(s): | Goane L; Carrizo BN; Ruiz MJ; Bachmann GE; Milla FH; Segura DF; Kuzmich D; Walse S; Vera MT; |
| Address: | "Facultad de Agronomia, Zootecnia y Veterinaria, Universidad Nacional de Tucuman, San Miguel de Tucuman T4000, Argentina. Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Ciudad Autonoma de Buenos Aires C1425FQB, Argentina. INTA Estacion Experimental Agricola Famailla, Famailla T4132, Argentina. Instituto de Genetica 'EA Favret', INTA, GV-IABIMO, CONICET, Partido de Hurlingham B1686, Argentina. San Joaquin Valley Agricultural Sciences Center, Agricultural Research Service, United States Department of Agriculture, Parlier, CA 93648, USA" |
| ISSN/ISBN: | 2075-4450 (Print) 2075-4450 (Electronic) 2075-4450 (Linking) |
| Abstract: | "Attractants are a powerful tool for pest management. The lack of specific attractants for the South American fruit fly, Anastrepha fraterculus, a complex of cryptic species of great economic importance in South America, makes it difficult to monitor the pest in the field. The gamma-lactone male sex and aggregation pheromones of several Anastrepha species, naturally released in a 7:3 epianastrephin to anastrephin ratio, and a structurally related naturally occurring gamma-lactone ((+/-)-trans-tetrahydroactinidiolide) with gem-dimethyl groups (dimethyl) at C(4), were evaluated as potential attractants of this species. Different age and mating conditions of A. fraterculus males and females were evaluated during electroantennography (EAG) and field cage experiments in which polymeric lures were deployed to contain 100 mg of attractant. Epianastrephin and dimethyl were EAG+ for all fly conditions, with epianastrephin eliciting the highest response for both sexes and immature flies showing greater responsiveness than mature flies. In the field cage experiments, immature flies were only attracted to leks; virgin females were attracted to leks, dimethyl, and both epianastrephin-anastrephin formulations (95 and 70 wt.% epianastrephin); mature-mated males were attracted to leks, dimethyl and 70 wt.% epianastrephin; and mature-mated females were only attracted to leks. Our bioassays showed a promising performance of the analog dimethyl since it elicited the same response as epianastrephin, requires fewer steps to synthesize, and contains one less chiral center than the natural pheromones. The attraction to leks was recorded for all mating conditions and ages of flies and suggests that air-borne volatiles of calling males contain cues that could act as sensory traps. The addition of any of these compounds in the synthetic attractants may result in a greater attraction and thus deserves further evaluation. Dose-response experiments will provide additional information to move a step forward and validate the results obtained in open-field conditions" |
| Keywords: | (+/-)-anastrephin (+/-)-epianastrephin (+/-)-trans-tetrahydroactinidiolide Ipm dimethyl field cage experiments physiological status species-specific attractants; |
| Notes: | "PubMed-not-MEDLINEGoane, Lucia Carrizo, Beatriz N Ruiz, Maria Josefina Bachmann, Guillermo E Milla, Fabian H Segura, Diego F Kuzmich, Dan Walse, Spencer Vera, Maria Teresa eng CRP Contract 24780/International Atomic Energy Agency/ PIP 2021-2023-896/Ministerio de Ciencia, Tecnologia e Innovacion/ Switzerland 2023/02/26 Insects. 2023 Feb 18; 14(2):206. doi: 10.3390/insects14020206" |
