Effect of volatile emissions, especially α-pinene, from persimmon trees infested by Japanese wax scales or treated with methyl jasmonate on recruitment of ladybeetle predators.

摘要: Persimmon, Diospyros kaki L., is an important fruit tree in northern China. Japanese wax scale, Ceroplastes japonicus Green (Hemiptera: Coccoidea: Coccidae), the most destructive pest persimmon orchards and difficult to control using chemical pesticides. This paper studied variety of volatile emissions from trees attacked by scale or induced applications methyl jasmonate (MeJA), exogenous signaling material. We also role volatiles recruiting ladybeetle, Chilocorus kuwanae Silvestri (Coleoptera: Coccinellidae), a primary predator scale. The results showed that ladybeetles displayed strong taxis responses odor sources treated with MeJA scale-damaged trees. Within 24 h after were MeJA, number responding fluctuated based on amount released over diel period. Chemical analysis terpenoid compounds, especially alpha-pinene, increased both MeJA-treated this was reason for ladybeetle attraction. Therefore, alpha-pinene used as single signal source examine response C. kuwanae. suggest plays significant attracting ladybeetles. It therefore concluded application might be stimulate defense function inducing release terpenoids, thereby more insects.