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Chemical and Biological Technologies in Agriculture

Table 2 The concentration inhibiting feeding by 50% (FI50) after the application of P. ribesioides extracts against S. exigua larvae (3rd instar) at 5 h exposure using leaf disc assay

From: Antifeedant Activity and Biochemical Responses in Spodoptera exigua Hübner (Lepidoptera: Noctuidae) Infesting Broccoli, Brassica oleracea var. alboglabra exposed to Piper ribesioides Wall Extracts and Allelochemicals

Crude extracts

FI50

(µg/cm2)

LCL-UCLA

df

χ2

P-value

Hexane

49.21

37.80–69.02

3

5.47

0.14

DichoromethaneB

 > 100

 > 100

3

1.85

0.60

Ethyl acetate

26.25

21.24–32.60

3

2.84

0.42

Methanol

82.17

62.40–120.46

3

7.42

0.06

CypermethrinC

0.027

0.02–0.51

3

0.28

0.96

  1. ALower confidence limit–upper confidence limit (µg/cm2)
  2. BFI50 values > 100 µg/cm2 were not determined
  3. CPositive control
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