REPRODUCTIVE BIOLOGY OF<i>LAMBDINA FISCELLARIA LUGUBROSA</i>(LEPIDOPTERA: GEOMETRIDAE)

Ostaff, Don P.; Borden, John H.; Shepherd, R. F.

doi:10.4039/ent106659-6

Cited by 8 publications

(7 citation statements)

References 15 publications

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“…There may also be geographic differences in the populations. The onset of mating in the western hemlock looper at 20 • C under L12:D12 photoperiod occurred in the second half of the scotophase (Ostaff et al, 1974), while under similar conditions, most matings of the EHL from Quebec occurred during the first half of the night (Delisle, unpublished). Thus, it is possible that there are two geographic strains of the EHL which have adapted to maritime and continental ecological conditions.…”

Section: Discussionmentioning

confidence: 99%

The relative performance of pheromone and light traps in monitoring the seasonal activity of both sexes of the eastern hemlock looper, Lambdina fiscellaria fiscellaria

Delisle

West

Bowers

1998

Entomologia Exp Applicata

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The seasonal flight activity of both sexes of the eastern hemlock looper, Lambdina fiscellaria fiscellaria Guenée (Lepidoptera: Geometridae) was studied during two consecutive years in Quebec and Newfoundland, using light (L), pheromone (P) and combined light and pheromone (LP) traps. Moth density significantly affected the performance of the different traps, with P traps being more effective at low than high density. However, P trap catches decreased just prior to the onset of female captures, probably as a result of competition between traps and virgin calling females. Nearly all females caught in L and LP traps were already mated and even the first females caught had laid at least half of their egg complement. In Quebec under warm nights, the pattern of male activity occurred at different times, with peak P catches being later in the scotophase than those of L traps, but overall similar numbers of males were caught in both traps. In contrast, under cool nights, males were caught early in the night in both P and L traps, suggesting a strong competition effect between traps, although more males were caught in P than L traps overall. In Newfoundland, the pattern of male captures in L and P traps was similar at both high and low temperatures, so competition between trap types would always be high. Under these conditions P traps were more effective than L traps. Irrespective of the region, year or temperature, significantly more males were captured in LP, with the effect of L and P being additive. In both regions, females responded similarly to L and LP traps with peak activity occurring early in the night. Captures of females were lower than those of males under cool temperatures, suggesting that the temperature threshold for flight is higher for females. The use of L and P traps simultaneously and/or in combination is discussed in relation to integrated pest management programs and ecological considerations.

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Section: Discussionmentioning

confidence: 99%

The relative performance of pheromone and light traps in monitoring the seasonal activity of both sexes of the eastern hemlock looper, Lambdina fiscellaria fiscellaria

Delisle

West

Bowers

1998

Entomologia Exp Applicata

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“…Preferred pupation sites include dry, decayed stumps, bark crevices and among lichens on the tree trunkpupae have sometimes been found on the forest floor. Adults emerge in late August and early September, mating usually takes place soon after female emergence and egg laying begins within 24 h of emergence (Ostaff et al, 1974a). Four pathways of entry into the PRA area were identified for L. fiscellaria: host plants for planting, cut foliage of host plants, fresh mosses/lichens and wood of host plants.…”

Section: Risk Of Entrymentioning

confidence: 99%

“…Preferred pupation sites include dry, decayed stumps, bark crevices and among lichens on the tree trunk – pupae have sometimes been found on the forest floor. Adults emerge in late August and early September, mating usually takes place soon after female emergence and egg laying begins within 24 h of emergence (Ostaff et al ., ).…”

Section: Introductionmentioning

confidence: 97%

Report of a rapid pest risk analysis for Lambdina fiscellaria (Guenée, [1858]) (Lepidoptera: Geometridae) for the island of Ireland

Tuffen

Wisdom²,

Nolan³

2019

EPPO Bulletin

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The hemlock looper, Lambdina fiscellaria (Guenée), is a serious forest pest in North America with three subspecies that vary in their geographical range and larval host preferences. Both broadleaved and coniferous trees are infested, though the largest impacts are on coniferous forestry where trees can be completely defoliated and killed. The pest was identified as a potential threat to forestry on the island of Ireland during a horizon‐scanning exercise to identify pests of Picea sitchensis (Bong.) Carr. (Sitka spruce) and was subject to a rapid pest risk analysis (PRA). Though judged to be unlikely, pathways identified were uncontrolled wood commodities and mosses and lichens harvested from forests in North America and exported for use in ornamental displays. Lambdina fiscellaria is found in a range of climate types, and is likely to be able to complete its lifecycle in the Irish climate – although there is uncertainty concerning its ability to adapt to European trees. Lambdina fiscellaria has only a limited capacity for spread, as virgin females are burdened by their eggs and are poor fliers. This was judged to reduce potential impacts in the PRA area – as the slow rate of spread would provide time to develop monitoring and control methods well ahead of the pest reaching its maximum extent on the island of Ireland. The pest still poses a considerable risk to coniferous forestry not only on the island of Ireland but across the EPPO region where climate is suitable for the pest to establish. Regulation and implementation of phytosanitary measures prevent introduction of the pest should be considered.

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“…Basic information on the reproductive biology of an insect (including fecundity, oviposition pattern, and egg size) is essential for understanding its population dynamics. Realized fecundity of the hemlock looper varies between 100 and 300 eggs across its range in North America (De Gryse and Schedl 1934;Ostaff et al 1974;. Variation in fecundity among populations in eastern Canada is related to latitude and is 35% higher in southern than in northern populations over a 6°latitudinal gradient (Berthiaume 2007).…”

Section: Introductionmentioning

confidence: 99%

Daily oviposition pattern of Lambdina fiscellaria (Lepidoptera: Geometridae) under laboratory conditions

Berthiaume¹,

Hébert

Lamontagne

et al. 2009

Can Entomol

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The hemlock looper, Lambdina fiscellaria, is one of the most economically damaging defoliators of North American coniferous forests. Basic information on its reproductive biology is an essential prerequisite for understanding its population dynamics. Realized fecundity for the two major hemlock looper ecotypes varies along a latitudinal gradient in eastern Canada, but their daily oviposition patterns are similar. Mated females lay eggs after a short pre-oviposition period, with daily oviposition peaking in the first 3 days. Mated females lay significantly more eggs than unmated ones, the latter laying their eggs more evenly throughout their life. Eggs deposited early in the oviposition period are larger than those deposited near the end. This may influence over-winter survival of hemlock loopers and should be considered in studies to better understand the population dynamics and improve management of this defoliator.

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REPRODUCTIVE BIOLOGY OFLAMBDINA FISCELLARIA LUGUBROSA(LEPIDOPTERA: GEOMETRIDAE)

Cited by 8 publications

References 15 publications

The relative performance of pheromone and light traps in monitoring the seasonal activity of both sexes of the eastern hemlock looper, Lambdina fiscellaria fiscellaria

The relative performance of pheromone and light traps in monitoring the seasonal activity of both sexes of the eastern hemlock looper, Lambdina fiscellaria fiscellaria

Report of a rapid pest risk analysis for Lambdina fiscellaria (Guenée, [1858]) (Lepidoptera: Geometridae) for the island of Ireland

Daily oviposition pattern of Lambdina fiscellaria (Lepidoptera: Geometridae) under laboratory conditions

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