Screening of the Acaricidal Activity of Essential Oils against Panonychus citri (McGregor) (Acari: Tetranychidae)

The citrus red mite, Panonychus citri (McGregor), is an important pest of in China, where pesticides are commonly used orchards. In order to reduce the use chemical against P. and development resistance, screening biological control agents has attracted attention students. this study, seven plant essential oils with high toxicity were selected from 40 by leaf-dip bioassay, including lemongrass, patchouli, juniper berry, sage, clove, frankincense, citrus. LC50 after 72 h treatment 3.198 ?L/mL, 8.312 3.244 6.701 8.350 21.953 8.788 respectively. According LT50, oils’ acute low citrus, vetiver, frankincense oils. general, lemongrass berry have best acaricidal effect application value for citri, which provides a basis botanical acaricides.