Relationship between Colonization by Onion Thrips (Thrips tabaci Lind.) and Leaf Colour Measures across Eight Onion Cultivars (Allium cepa L.)

Thrips tabaci Lindeman is a global pest and also represents serious threat to onion production in Poland. In 2 years (2015–2016) of field studies, 8 cultivars were evaluated characterize their susceptibility thrips determine if leaf colour associated with preference. The actual count the proportional abundance adult collected from leaves during plant colonization by insects both used express preference for different cultivars. At same time, measurements analysed considering CIELAB (CIE 1976 L*a*b*) CIE L*C*h* spaces. There distinct differences thrips. Leaf coordinate values correlated attractiveness thrips; typically, higher lightness (L*), yellowness (b*), chroma (C*), hue (h*), lower redness (a*) attracted more We concluded that vivid, intense green-yellowish susceptible varieties might have been cause observed. identified useful genotypes, Tęcza Wenta, host resistance suggest link between antixenotic resistance. resistant had darker, green-grey-yellowish leaves.