title: Evaluation of chromatic cues for trapping Bactrocera tau.
abstract: BACKGROUND
  Trapping technology based on chromatic cues is an important strategy in controlling Tephritidae (fruit flies). The objectives of this present study were to evaluate the preference of Bactrocera tau for different chromatic cues, and to explore an easy method to print and reproduce coloured paper.
  
  
  RESULTS
  Chromatic cues significantly affected the preference of adult B. tau. Wavelengths in the 515-604 nm range were the suitable wavelengths for trapping B. tau. Different-day-old B. tau had different colour preferences. Virtual wavelengths of 595 nm (yellow) and 568 nm (yellowish green) were the optimum wavelengths for trapping 5-7-day-old B. tau and 30-32-day-old B. tau respectively. The trap type and height significantly influenced B. tau attraction efficiency. The number of B. tau on coloured traps hung perpendicular to plant rows was not significantly higher than the number on traps hung parallel to plant rows.
  
  
  CONCLUSIONS
  The quantisation of colour on the basis of Bruton's wavelength to RGB function can serve as an alternative method for printing and reproducing coloured paper, but a corrected equation should be established between the theoretical wavelength and actual wavelength of coloured paper. Results show that a compound paper coloured yellow (595 nm) and yellowish green (568 nm) installed at 60 and 90 cm above the ground shows the maximum effect for trapping B. tau. © 2016 Society of Chemical Industry.
authors.affiliation: Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Li
authors.affiliation: College of Environment and Plant Protection, Hainan University, China.
authors.forename: Huabo
authors.initials: H
authors.lastname: Ma
authors.affiliation: Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, China.
authors.forename: Liming
authors.initials: L
authors.lastname: Niu
authors.affiliation: Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, China.
authors.forename: Dongyin
authors.initials: D
authors.lastname: Han
authors.affiliation: Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, China.
authors.forename: Fangping
authors.initials: F
authors.lastname: Zhang
authors.affiliation: Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, China.
authors.forename: Junyu
authors.initials: J
authors.lastname: Chen
authors.affiliation: Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, China.
authors.forename: Yueguan
authors.initials: Y
authors.lastname: Fu
mesh_terms: D000818:Animals; D001522:Behavior, Animal; D003116:Color; D010572:Pest Control, Biological / Q000379:methods*; D033621:Tephritidae / Q000502:physiology*
keywords: Bactrocera tau; RGB; chromatic cue; virtual wavelength