| Autor: |
Andrade Mdos S; Departamento de Química, Universidade Federal de São Carlos, CP 676, São Carlos-SP 13565-905, Brazil. msandrade2003@gmail.com., Ribeiro Ldo P; Departamento de Entomologia e Acarologia, Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz (USP/ESALQ)-Av. Pádua Dias, 11, Agronomia, CEP 13418-900, Piracicaba-SP, Brazil. leandroribeiro@epagri.sc.gov.br., Borgoni PC; Departamento de Entomologia e Acarologia, Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz (USP/ESALQ)-Av. Pádua Dias, 11, Agronomia, CEP 13418-900, Piracicaba-SP, Brazil. pcbogorni@yahoo.com.br., Silva MF; Departamento de Química, Universidade Federal de São Carlos, CP 676, São Carlos-SP 13565-905, Brazil. dmfs@ufscar.br., Forim MR; Departamento de Química, Universidade Federal de São Carlos, CP 676, São Carlos-SP 13565-905, Brazil. mrforim@gmail.com., Fernandes JB; Departamento de Química, Universidade Federal de São Carlos, CP 676, São Carlos-SP 13565-905, Brazil. djb@ufscar.br., Vieira PC; Departamento de Química, Universidade Federal de São Carlos, CP 676, São Carlos-SP 13565-905, Brazil. dpcv@ufscar.br., Vendramin JD; Departamento de Entomologia e Acarologia, Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz (USP/ESALQ)-Av. Pádua Dias, 11, Agronomia, CEP 13418-900, Piracicaba-SP, Brazil. jdvendra@usp.br., Machado MA; Centro APTA Citros Sylvio Moreira, Instituto Agronômico, CP 04, Cordeirópolis-SP 13490-970, Brazil. marcos@centrodecitricultura.br. |
| Abstrakt: |
The chemical composition of volatile oils from 22 genotypes of Citrus and related genera was poorly differentiated, but chemometric techniques have clarified the relationships between the 22 genotypes, and allowed us to understand their resistance to D. citri. The most convincing similarities include the synthesis of (Z)-β-ocimene and (E)-caryophyllene for all 11 genotypes of group A. Genotypes of group B are not uniformly characterized by essential oil compounds. When stimulated with odor sources of 22 genotypes in a Y-tube olfactometer D. citri preferentially entered the arm containing the volatile oils of Murraya paniculata, confirming orange jasmine as its best host. C. reticulata × C. sinensis was the least preferred genotype, and is characterized by the presence of phytol, (Z)-β-ocimene, and β-elemene, which were not found in the most preferred genotype. We speculate that these three compounds may act as a repellent, making these oils less attractive to D. citri. |
