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Table 3 Population densities of Stethorus punctellium 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 6.75 ± 2.06 aA 6.50 ± 2.22 aB 4.75 ± 0.48 aBC 0.380NS
(+) 2 1.25 ± 0.75 bB 4.50 ± 1.32 aB 4.00 ± 0.71 abC 4.267*
(+) 12 0.00 ± 0.00 bB 8.75 ± 1.25 aB 6.25 ± 0.75 aABC 28.676**
(+) 24 0.75 ± 0.25 bB 7.00 ± 1.58 aB 4.25 ± 1.18 aC 7.437**
(+) 48 2.25 ± 0.85 bB 8.25 ± 1.31 aB 7.25 ± 1.44 aAB 6.857*
(+) 72 2.00 ± 0.41 bB 7.25 ± 1.11 aB 8.00 ± 0.82 aA 15.545**
(+) 7 days 2.50 ± 0.87 bB 7.00 + 1.22 aB 6.75 ± 0.63 aABC 7.252**
F value (2) 5.147** 0.859NS 2.957*  
  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