中草药提取物对朱砂叶螨(Tetranychus cinnabarinus)生物活性的研究

通过玻片浸渍法室内测定了8种供试中草药的3种提取物对朱砂叶螨成螨的触杀活性。当提取物浓度达到2mg?mL- 1时，旋覆花与石楠叶石油醚提取物、蓖麻子甲醇提取物的杀螨活性较高。毒力活性测定表明：旋覆花与石楠叶石油醚提取物的LC50值分别为(1.1843±0.0868mg/mL)和(1.3731±0.0898 mg/mL)、蓖麻子甲醇提取物的LC50值为(1.2111±0.1616 mg/mL)。由此表明，这3种植物的提取物均具有较好的杀螨生物活性。

Evaluation Acaricidal Activities of Medicinal Plants Extracts against Tetranychus cinnabarinus

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).