The results show that matrine·nicotine 1.

This paper discusses on the life habit of the Jingyuan pine-needle wasp,introduces the method for preventing the pine-needle wasp by using the matridine smoking agent,and puts forward some matters needing attention in using this method.

6 % of larvae of the second to the third instars were killed in pines forest with 40% Matrine smoke,1.

Determin ation of total matrine concentration by bromocresol green method;

Method:Orthogonal design L_9(3~4) was used to study the best extraction condition with the content of the synthesized evaluation of total extraction,total saponin and total matrine.