Insecticidal and bacteriostatic activities of extracts from three species of Ligularia

• LI Jing, 
• LI Na, 
• DING Ping, 
• FU Linyun, 
• WANG Tao, 
• DU Wenjing, 
• ZHANG Jianjun, 
• WU Jianrong, 
• LIU Jinxia