Bulletin of the National Research Centre

Table 4 Percentage of increase or decrease in 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
	Treated plot	Untreated plot	Untreated area
	% Increase/decrease
(−) 0	–	–	–
(+) 2	− 81.48	− 30.77	− 15.79
(+) 12	− 100.00	+ 34.62	+ 31.58
(+) 24	− 88.89	+ 7.69	− 10.53
(+) 48	− 66.67	+ 26.92	+ 52.63
(+) 72	− 70.37	+ 11.54	+ 68.42
(+) 7 days	− 62.96	+ 7.69	+ 42.11

Before application (−), after application (+)

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