scholarly journals Evaluating the resilience of northern interior cedar hemlock forests to western hemlock looper defoliation events.

2014 ◽  
Author(s):  
Michelle Janette Connolly
Keyword(s):  
Western Hemlock ◽  
Western Hemlock Looper ◽  
Hemlock Looper

CHAETOPHLEPSIS NASELLENSIS, A DIPTEROUS PARASITOID OF THE WESTERN HEMLOCK LOOPER (LEPIDOPTERA: GEOMETRIDAE)

1977 ◽  
Vol 109 (8) ◽  
pp. 1121-1128
Author(s):  
Richard D. Medley ◽  
V. M. Carolin
Keyword(s):  
Body Length ◽  
Field Studies ◽  
Instar Larva ◽  
Western Hemlock ◽  
Larval Instars ◽  
First Instar ◽  
Western Hemlock Looper ◽  
Lambdina Fiscellaria Lugubrosa ◽  
Hemlock Looper

AbstractPreserved material from 1962 field studies provided information on the habits and morphology of the tachinid parasitoid Chaetophlepsis nasellensis Reinhard. Parasitization of the larvae of the western hemlock looper, Lambdina fiscellaria lugubrosa (Hulst), continues over a 30- to 40-day period. Maggots issue from the host larvae and drop to the ground to pupate. The pupae normally overwinter, with adults emerging the following spring or summer. The early first-instar larva differs markedly from the late first-instar. The three instars can be distinguished on the basis of body length and the structure and form of the buccopharyngeal apparatus. The first and third larval instars and the puparium are distinctive enough to permit easy identification during studies of the western hemlock looper and associated loopers.

SAMPLING WESTERN HEMLOCK LOOPER PUPAE (LEPIDOPTERA: GEOMETRIDAE) USING BURLAP TRAPS

1989 ◽  
Vol 24 (3) ◽  
pp. 348-354 ◽  
Author(s):  
Terry L. Shore
Keyword(s):  
Sample Size ◽  
Surface Area ◽  
Significant Relationship ◽  
Tsuga Heterophylla ◽  
Western Hemlock ◽  
Tree Diameter ◽  
Breast Height ◽  
Western Hemlock Looper ◽  
Lambdina Fiscellaria Lugubrosa ◽  
Hemlock Looper

Burlap wrapped around western hemlock, Tsuga heterophylla (Raf.) Sarg., trees at breast height was used to trap pupae of the western hemlock looper, Lambdina fiscellaria lugubrosa (Hulst). The number of pupae in the traps was highly variable and was not related to tree diameter or the surface area of the trap. There was a significant relationship between the number of viable pupae per trap and the number of healthy western hemlock looper eggs subsequently laid on lichen in the trees. Sample size requirements are presented.

scholarly journals EGG SAMPLING FOR THE WESTERN HEMLOCK LOOPER

1958 ◽  
Vol 34 (3) ◽  
pp. 248-256 ◽  
Author(s):  
M. G. Thomson
Keyword(s):  
Western Hemlock ◽  
Western Hemlock Looper ◽  
Hemlock Looper ◽  
Oviposition Sites

The western hemlock looper will lay eggs in all parts of a tree, but in the years prior to heavy defoliation the greatest number of eggs will be found on the bole in the mid crown. Moss and lichen are the preferred oviposition sites, but many eggs are laid singly in bark crevices. Where ten or more eggs per half-square-foot sample of bark are found in the mid crown, noticeable defoliation may occur in the next summer.

Sex pheromone of the western hemlock looper,Lambdina fiscellaria lugubrosa (Hulst) (Lepidoptera: Geometridae)

1993 ◽  
Vol 19 (5) ◽  
pp. 1009-1019 ◽  
Author(s):  
Gerhard Gries ◽  
Regine Gries ◽  
Sh�n H. Krannitz ◽  
Jianxiong Li ◽  
G. G. Skip King ◽  
...  
Keyword(s):  
Sex Pheromone ◽  
Western Hemlock ◽  
Western Hemlock Looper ◽  
Lambdina Fiscellaria Lugubrosa ◽  
Hemlock Looper
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