Evaluation of insecticidal activity of the essential oil of Eucalyptus robusta Smith leaves and its constituent compound against overwintering Cacopsylla chinensis (Yang et Li) (Hemiptera: Psyllidae)
Xin Chao Liu, Qi Zhi Liu, Wang Peng Shi, and Zhi Long Liu
Water-distilled essential oil from Eucalyptus robusta Smith leaves was analyzed by gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS). Thirty-six compounds, accounting for 96.21 % of the total oil, were identified and the main components of the essential oil of E. robusta leaves were α-pinene (30.18%), 1,8-cineole (26.08%), and spathulenol (5.31%), followed by globulol (4.44%), and viridiflorol (3.97%). The essential oil of E. robusta leaves possessed contact toxicity against the overwintering adults of Chinese pear psylla (Cacopsylla chinensis) with a LD50 value of 10.61 μg/adult. The two main constituent compounds, α-pinene and 1,8-cineole exhibited strong acute toxicity against the overwintering Chinese pear psylla with LD50 values of 1.34 μg/adult and 11.76 μg/adult, respectively
Xin Chao Liu, Qi Zhi Liu, Wang Peng Shi,, Zhi Long Liu. Evaluation of insecticidal activity of the essential oil of Eucalyptus robusta Smith leaves and its constituent compound against overwintering Cacopsylla chinensis (Yang et Li) (Hemiptera: Psyllidae). J Entomol Zool Stud 2014;2(4):27-31.