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Poster Display

Plant-Insect Ecosystems

Poster: P-IE, Biodiversity and Invasive Species

Navel orangeworm, Amyelois transitella (Walker), host plant determination using near-infrared spectroscopy

Tuesday, November 11, 2025
9:00 AM - 5:00 PM Pacific
Location: Exhibit Hall A-A1, OCC
Poster Display
Host plant determination of insects captured in traps is useful in monitoring distribution patterns. In this study, Near Infrared Spectroscopy was used to differentiate between Navel Orangeworm (NOW), Amyelois transitella (Walker), reared on almonds and those reared on pistachios. Laboratory colonies of NOW were reared on almond flour and pistachio flour, a bran based artificial diet, as well as whole kernels of almonds and pistachios. NIR spectra of emerging moths were captured using a benchtop Fourier Transform Spectrophotometer with an integrating sphere in diffuse reflection mode. Spectra were distributed into training, validation and test sets and canonical discriminant analysis was applied following Standard Normal Variate (SNV) pretreatment. 84% accuracy was achieved in distinguishing the two classes.