An Analysis of Physiological Changes and Spectral Characteristics of Platanus occidentalis Leaves Infested by Corythucha ciliata (SAY) (Hemiptera:Tingidae)

Since its infestation was first discovered in Wuhan, Hubei Province, China, October 2006, Corythurcha ciliata has become an important piercing-sucking pest of Platanus occidentalis. In this paper, the content secondary plant products, nutrients, and resistance enzymes damaged leaves P. occidentalis determined, infested by different numbers adults (0 head, 1–3 heads, or >7 heads) were tested via spectrum analysis. The results showed that tannin 1.47 mg/100 g, which higher than undamaged (1.20 mg/g). control poplar (Populus × euramericana cv.‘74/76’) 0.2 g leaves. soluble sugar intact (1.35 g) significantly C. feeding can induce increase defense enzymes, such as peroxidase, polyphenol oxidase, phenylalanine ammonia lyase, host west south part crown, 580–680 nm is a sensitive band for monitoring ciliata. study be used to reveal host-selection mechanism explore new infestation-monitoring technologies.