Pheromone Production, Attraction, and Interspecific Inhibition among Four Species of Ips Bark Beetles in the Southeastern USA

Table 2

Pilot study, Francis Marion National Forest, SC, and Nantahala National Forest, NC, July 1990: pheromone candidates released from Wick-baits: for abbreviations, see Table 1. Release rates are given in μg/h.

	MB	Id	Ie	EM	Ger	cV
avulsus-bait	20	20	—	—	—	2.5
calligraphus-bait	—	100	—	—	5.0	50
grandicollis-bait	—	1.0	50	5.0	2.5	2.5
pini-bait	—	250	—	20	10	20
Subtractive assay
Total blend (TB)	20	250	50	20	10	50
TB-MB	—	250	50	20	10	50
TB-Id	20	—	50	20	10	50
TB-Ie	20	250	—	20	10	50
TB-EM	20	250	50	—	10	50
TB-Ger	20	250	50	20	—	50
TB-cV	20	250	50	20	10	—
Blank	—	—	—	—	—	—