Table 3 Mean concentration of chemical anti-herbivory compounds in four invasive species of pine and results of Kruskal–Wallis test.

From: Sheep feeding preference as a tool to control pine invasion in Patagonia: influence of foliar toughness, terpenoids and resin content

 

Mean concentration per species

Kruskal–Wallis test results

P. contorta

P. ponderosa

P. radiata

P. jeffreyi

X2

df

p

β-Pinene (μL/g)

1.81

2.7

1.06

1.26

36.52

3

5.81E−08

β-Phellandrene (μL/g)

1.94

0.1

0.15

0.15

47.61

3

2.58E−10

3-Carene (μL/g)

0.30

1.94

0.11

0.01

56.83

3

2.791e−12

Non-volatile resins (mg/g DW)

25.33

72.72

12.8

25.73

46.87

3

3.705e−10

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