Individual vulnerability factors of Silver fir (Abies alba Mill.) to parasitism by two contrasting biotic agents: mistletoe (Viscum album L. ssp. abietis) and bark beetles (Coleoptera: Curculionidae: Scolytinae) during a decline process

Table 3 Abundance of bark beetles species (number of insects/m² of bark) according to their tree location (stem bark patches or branches) on 12 infested silver firs of the contour line transect on Mont-Ventoux, France

Abundance of bark beetles (number of insects/m²)
Species	Stem bark patches (N = 24)		Branches (N = 24)
Species	Lower patches	Upper patches	Lower branches	Upper branches
Total	526	241	60	215
PSPI	526	389	10	57
CCIN	0	0	0	7
PPIT	0	0	45	493
PVOR	0	93	125	102
CABIE	0	0	0	14

PSPI Pityokteines spinidens, CCIN Crypturgus cinereus, PPIT Pityophthorus pityographus, PVOR Pityokteines vorontzovi, CABIE Cryphalus abietis

ISSN: 1297-966X