Table 3 Antifeeding activity of the tested compounds from Plutellaxylostell alarvae.

From: Polyhydroxy cucurbitane triterpenes from Hemsleya penxianensis tubers

Conc. (c%)

Antifeedant rate (%)

No.

0.5

0.25

0.1

0.05

0.01

7

38.00

36.31

32.66

30.59

27.67

10

43.57

41.79

38.97

35.83

33.06

11

33.88

31.93

31.23

30.18

29.23

12

35.31

33.76

33.20

30.95

26.56