Skip to main content

Table 1 Population densities of Coccinella undecimpunctata adults in untreated and sulfur-treated marrow cultivations

From: Impact of sulfur dust application on the abundance of two important coccinellid predators in marrow fields

Inspection periods (hours)

First area

Second area

F value (1)

Average number of adults/50 plants/plot ± SE

Treated plot

Untreated plot

Untreated area

(−) 0

16.20 ± 0.86 aAB

18.20 ± 0.86 aC

17.00 ± 0.71 aB

1.535 NS

(+) 2

6.80 ± 1.07 bD

29.60 ± 1.50 aAB

27.80 ± 1.85 aA

70.474**

(+) 12

8.40 ± 1.36 cD

32.80 ± 0.86 aA

29.20 ± 1.16 bA

132.102**

(+) 24

9.20 ± 1.16 bCD

31.00 ± 2.92 aA

30.80 ± 1.50 aA

38.983**

(+) 48

13.80 ± 2.69 bBC

25.20 ± 1.66 aB

18.60 ± 1.21 bB

8.591**

(+) 72

17.20 ± 1.56 aAB

18.40 ± 1.03 aC

15.80 ± 1.69 aB

0.801 NS

(+) 7 days

20.40 ± 1.72 aA

14.00 ± 2.35 aC

10.80 ± 1.50 bC

6.699*

F value (2)

10.348**

17.551**

29.961**

 
  1. Before application (−), after application (+), df 1 = 2, 9, df 2 = 6, 21. Data in rows with the same small letters are not significantly different (P value at 5%). Data in columns with the same capital letters are not significantly different (P value at 5%). *Significant, **highly significant, and  NS insignificant