Declining Bark Beetle Densities (Ips typographus, Coleoptera: Scolytinae) from Infested Norway Spruce Stands and Possible Implications for Management

Table 1

Calculated values for the catches (beetles per trap) in (a) the city, (b) the open land, and (c) in the broadleaf stand transect.

	(a) City	(b) Open land	(c) Broadleaf stand
Catches at 500 m (n)	572	1,383	9,173
Catches at 500 m (%)	7%	12%	36%
50% catches at	40 m	70 m	250 m
5% catches at	570 m	990 m	4,160 m