Repellency of forty‐one aromatic plant species to the Asian citrus psyllid, vector of the bacterium associated with huanglongbing. Issue 23 (3rd November 2020)

• Record Type: Journal Article
• Authors: Yan, Zhaogui; Zhang, Qun; Zhang, Nan; Li, Wan; Chang, Cuiying; Xiang, Yan; Xia, Changxiu; Jiang, Tengyu; He, Wei; Luo, Jie; Xu, Yongrong
• Is Part Of: Ecology and evolution. Volume 10:Issue 23(2020)
• Page Start: 12940
• Page End: 12948
• Publication Date: 2020-11-03
• Subjects: biological control -- citrus greening disease -- Diaphorina citri -- insect vector -- plant repellency -- volatile; Ecology -- Periodicals; Evolution -- Periodicals; 577.05
• DOI: 10.1002/ece3.6876
• Languages: English
• ISSNs: 2045-7758

Abstract

Abstract: Huanglongbing (HLB) is the most devastating citrus disease worldwide. The organism associated with the disease is spread by an insect vector, Diaphorina citri, commonly known as Asian citrus psyllid (ACP). Current management of HLB relies either on physical removal of the infected plants or on chemical control of ACP. Both methods are costly and not overly effective. In addition, public concerns regarding insecticide residues in fruit have greatly increased in recent years. It has been hypothesized that plant volatiles could act as repellents to ACP, thus reduce the incidence of HLB. To test this hypothesis, the repellency of fresh tissues of 41 aromatic plant species to ACP was investigated. The repellency of individual species was determined using a Y‐tube olfactometer. Our results showed that volatiles of five plant species were highly effective in repelling ACP with repellency as much as 76%. Among these, the tree species, Camptotheca acuminate, a nd the two shrubs, Lantana camara and Mimosa bimucronata, could potentially be planted as a landscape barrier. The two herbs, Capsicum annuum and Gynura bicolor, could potentially be used as interplantings in orchards. This is the first time that the repellency of fresh tissues from a diverse range of plant species to ACP has been determined. Although further field evaluation of various interplanting regimes and landscape barriers are needed to assess their effectiveness, our results showed that these aromatic species, being highly repellent to ACP, offer great potential as more cost‐effective and environmentally sustainable alternatives to the current methods of managing HLB. Abstract : The repellency of 41 species to Diaphorina citri was determined. Volatiles of five plant species were highly effective in repelling Diaphorina citri . Repellency was as high as 76%. These five species offer potential for managing citrus Huanglongbing.