Study on the Bioactivity of 1% Celangulins ME against the Piutella xylbstella and Pieris rapae

The method of biological test indoor and experiment in field was adopted in the paper,and the biological activity of Piutella xylbstella L.and Pieris rapae L.using 1% high osmotic Celangulins ME microemulsion was studied.The results of pesticide soak indoor biological test showed:LC_(50) of 1% Celangulins microemulsion against Piutella xylbstella and Pieris rapae with the age of three larvae LC_(50) was respectively 0.98 and 0.39?mg/L;but the LC_(50) of 1% Celangulins EC to Piutella xylbstella and Pieris rapae with the age of three larvae was respectively 1.81 and 1.01 ml/L.The medicinal effect in field showed:the medicinal effect of 1% Celangulins microemulsion diluted 800～1?000 times was better and longer than 1% Celangulins emulsive oil,which reduced the dosage of 35～40 percent in technical grade material.