Abstract:

Acaricidal activities of eight plants extracts by 3 solvent against Tetranychus cinnabarinus were measured in laboratory using slide-dip method. The mortality from petroleum ether extract of Inula britanica；Ricinus communis methanol ether extract；Photinia serrulate petroleum ether extract after treatment，which showed significantly higher acaricidal activities than the other ones in the concentration of 1mg/mL The result of acaricidal activities test showed their LC50 value as follows: Inula britanica. Photinia serrulate petroleum ether extract with LC50 value of (1.1843±0.0868mg/mL) and (1.3731±0.0898 mg/mL). Ricinus communis methanol ether extract with LC50 value of (1.2111±0.1616 mg/mL).