Method for increasing content of rotenone in stems of derris elliptica

The invention relates to a method for increasing content of rotenone in stems of derris elliptica, which belongs to the technical field of agricultural biotechnology and plant growth regulator application. The stems of the derris elliptica, which grow for 2 to 3 years, are treated with naphthylacetic acid in a range of from 50 mg/L to 200mg/L and then buried in sand for 20 to 30 days. The method can be used for regulating a secondary metabolism system for the stems of the derris elliptica, so that the content of the rotenone is increased by 10 to 20 times, the content of the rotenone in the stems of the derris elliptica is increased greatly, the stems of the derris elliptica are fully utilized, utilization benefit of the derris elliptica is maximized, and economic benefit is increased. The method is wide in application prospect.