Scolytid Flight in White Spruce Stands in Alaska

Beckwith, Roy C.

doi:10.4039/ent1041977-12

Cited by 17 publications

(17 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At 245 km southward on the Kenai Peninsula, beetles began flying 2 June 1969 (Beckwith 1972). By 9 June, attacks were common in standing trees and some egg galleries were 6 cm long.…”

Section: Resultsmentioning

confidence: 99%

EFFECTS OF INSECT GROWTH REGULATORS ON THE WESTERN SPRUCE BUDWORM (CHORISTONEURA OCCIDENTALIS) (LEPIDOPTERA: TORTRICIDAE): I. LETHAL EFFECTS OF LAST INSTAR TREATMENTS

Robertson

Kimball

1979

Can Entomol

View full text Add to dashboard Cite

Can. Ent. 1 1 1 : 1355-1360 (1979) The antiaggregation pheromone MCH was ineffective in preventing spruce beetle infestation in felled spruce near Hope, Alaska. In October, most progeny were larvae but some were pupae and new adults. Densities of spruce beetle attacks and progeny on the shaded under side of stems were about twice those on the upper side, whereas attacks of Polygraphus rufipennis (Kirby) and Dryocoetes affaber (Mann.) on the upper side were 100 times those on the under side. Ips tridens engelmanni Swain was present in only 2% of bark samples. Entomophagous insects were scarce; only Medetera sp. and Coeloides sp. were found. Spruce beetle progeny were 45 times more abundant than attacking parents. Factors affecting the efficiency of sampling spruce beetle attacks and progeny are discussed.The spruce beetle, Dendroctonus rufipennis (Kirby) (= obesus (Mann.) = engelmanni Hopk.), infests mature spruces throughout their distribution in North America. Outbreaks have occurred at numerous locations (Furniss et al. 1976;Schmid and Frye 1977) including the general vicinity of this study (Baker and Kernperman 1974).Completion of a spruce beetle generation requires 1 to 3 years (usually 2),

show abstract

“…At 245 km southward on the Kenai Peninsula, beetles began flying 2 June 1969 (Beckwith 1972). By 9 June, attacks were common in standing trees and some egg galleries were 6 cm long.…”

Section: Resultsmentioning

confidence: 99%

EFFECTS OF INSECT GROWTH REGULATORS ON THE WESTERN SPRUCE BUDWORM (CHORISTONEURA OCCIDENTALIS) (LEPIDOPTERA: TORTRICIDAE): I. LETHAL EFFECTS OF LAST INSTAR TREATMENTS

Robertson

Kimball

1979

Can Entomol

View full text Add to dashboard Cite

show abstract

“…Risk of extinctions for species depending on rare conifers under pressure of increased outbreaks (McFarlane et al 2009). (Lange et al 2006), and lowland northern areas of North America for D. rufipennis and I. pertubatus (Beckwith 1972;Wood 1982b). In some regions, life cycle asynchrony between invasive and native species may possibly lead to little or no temporal overlap, resulting in an advantage for the earlier colonizer.…”

Section: Biodiversitymentioning

confidence: 99%

Inter-species interactions and ecosystem effects of non-indigenous invasive and native tree-killing bark beetles

Økland¹,

Erbilgin

Skarpaas

et al. 2011

Biol Invasions

View full text Add to dashboard Cite

Frequent bark beetle outbreaks cause biome-scale impacts in boreal and temperate forests worldwide. Despite frequent interceptions at ports of entry, the most aggressive bark beetle species of Ips and Dendroctonus in North America and Eurasia have failed to establish outside their original home continents. Our experiments showed that Ips typographus can breed in six North American spruce species: Engelmann spruce, white spruce¸Sitka spruce, Lutz spruce, black spruce and red spruce. This suggests that differences between the Eurasian historical host and North American spruce species are not an insurmountable barrier to establishment of this tree-killing species in North America. However, slightly diminished quality of offspring beetles emerged from the North American spruces could reduce the chance of establishment through an Allee effect. The probabilistic nature of invasion dynamics suggests that successful establishments can occur when the import practice allows frequent arrivals of non-indigenous bark beetles (increased propagule load). Model simulations of hypothetical interactions of Dendroctonus rufipennis and I. typographus indicated that inter-species facilitations could result in more frequent and severe outbreaks than those caused by I. typographus alone. The potential effects of such new dynamics on coniferous ecosystems may be dramatic and extensive, including major shifts in forest structure and species composition, increased carbon emissions and stream flow, direct and indirect impacts on wildlife and invertebrate communities, and loss of biodiversity.

show abstract

“…Elsewhere, knowledge concerning P . rujipennis emergence is qualitative (HOPKINS, 1899;BLACKMAN and STAGE, 191 8), fragmentary (HILTON, 1968;RUDINSKY et al, 1978), or inferred from seasonal flight studies which utilized window traps (BECKWITH, 1972;HOSKING and KNIGHT, 1975). The present paper reports emergence and flight patterns qf P. rujipennis.…”

Section: Introductionmentioning

confidence: 90%

Bionomics of the four‐eyed spruce bark beetle, Polygraphus rufipennis(Kirby) (Col., Scolytidae) in Newfoundland I. Emergence and flight patterns

Bowers

Borden

Raske

1996

J Applied Entomology

View full text Add to dashboard Cite

Emergence patterns and sex ratios of P. rufipennis infesting black spruce were investigated using on‐tree emergence traps. Totals of 242 and 255 beetles (5.0 and 4.0 per 100 cm2) emerged in the traps in 1983 and 1984, respectively. Emergence began on 23 May 1983, and continued for c. 11 weeks; 50% of the adults had emerged by 15 (1983) and 20 June (1984). Generally, fewer beetles emerged as bole height increased. Thinner bark higher in the bole was correlated with decreased beetle emergence and probably reflects lower brood survival. In both years female‐biased sex ratios occurred early in the emergence period but overall female to male sex ratios for 1983 and 1984 were 1.1:1 and 1.9:1, respectively. Differential mortality caused by the interaction of cold temperatures and host characteristics may have accounted for departure from 1:1 brood sex ratio. Two peaks of flight activity corresponded strongly to patterns of brood emergence in spring and to parent adult re‐emergence in summer.

show abstract

Scolytid Flight in White Spruce Stands in Alaska

Cited by 17 publications

References 4 publications

EFFECTS OF INSECT GROWTH REGULATORS ON THE WESTERN SPRUCE BUDWORM (CHORISTONEURA OCCIDENTALIS) (LEPIDOPTERA: TORTRICIDAE): I. LETHAL EFFECTS OF LAST INSTAR TREATMENTS

EFFECTS OF INSECT GROWTH REGULATORS ON THE WESTERN SPRUCE BUDWORM (CHORISTONEURA OCCIDENTALIS) (LEPIDOPTERA: TORTRICIDAE): I. LETHAL EFFECTS OF LAST INSTAR TREATMENTS

Inter-species interactions and ecosystem effects of non-indigenous invasive and native tree-killing bark beetles

Bionomics of the four‐eyed spruce bark beetle, Polygraphus rufipennis(Kirby) (Col., Scolytidae) in Newfoundland I. Emergence and flight patterns

Contact Info

Product

Resources

About