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.

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

A VIRUS DISEASE OF WESTERN HEMLOCK LOOPER, LAMBDINA FISCELLARIA LUGUBROSA (HULST) (LEPIDOPTERA: GEOMETRIDAE)

1957 ◽  
Vol 3 (6) ◽  
pp. 799-802 ◽  
Author(s):  
S. M. Sager
Keyword(s):  
Incubation Period ◽  
Fat Body ◽  
Virus Disease ◽  
Infectious Agent ◽  
Western Hemlock ◽  
Short Period ◽  
Western Hemlock Looper ◽  
Nuclear Polyhedrosis ◽  
Lambdina Fiscellaria Lugubrosa ◽  
Hemlock Looper

Some observations have been made on the infectious agent, the histopathology, and the incubation period of a polyhedrosis in western hemlock looper larvae. External and internal symptoms are generally similar to nuclear polyhedrosis in other Lepidoptera. Infection is first detectable in fat body nuclei, other susceptible tissues being blood, hypodermis, and tracheal matrix. Larvae subjected to a short period of starvation just prior to oral infection show a shorter incubation period than non-starved larvae. The polyhedral inclusion bodies range from 0.5 μ to 5.0 μ in diameter. Electron micrographs of dissolved polyhedra show their contents to be largely rod-shaped viruses measuring approximately 40 mμ × 290 mμ.

Laboratory Evaluation of DDT and Phosphamidon on the Western Hemlock Looper, Lambdina fiscellaria lugubrosa (Hulst)

1963 ◽  
Vol 95 (4) ◽  
pp. 365-371 ◽  
Author(s):  
A. P. Randall ◽  
C. Jackson
Keyword(s):  
Aqueous Solution ◽  
Systemic Toxicity ◽  
High Order ◽  
Fuel Oil ◽  
Western Hemlock ◽  
Laboratory Evaluation ◽  
Spray Tower ◽  
Western Hemlock Looper ◽  
Lambdina Fiscellaria Lugubrosa ◽  
Hemlock Looper

AbstractSpray tower application of DDT in fuel oil at 0.2 lb. DDT/acre, proved to be highly toxic to the larvae of the western hemlock looper. Tolerance to DDT appeared to vary directly with larval age. Phosphamidon applied in aqueous solution to hemlock foliage showed a high order of contact and systemic toxicity to larvae placed on the treated foliage.

The Hydraenidae of Cuba (Insecta: Coleoptera) II: Morphology of preimaginal stages of six species and notes on their biology

Zootaxa ◽  
2017 ◽  
Vol 4238 (4) ◽  
pp. 451 ◽  
Author(s):  
ALBERT DELER-HERNÁNDEZ ◽  
JUAN A. DELGADO
Keyword(s):  
Instar Larva ◽  
Morphological Characters ◽  
Larval Instars ◽  
First Instar ◽  
Preimaginal Stages ◽  
First Time ◽  
Third Instar Larvae

Preimaginal stages of the six species of Hydraenidae presently known from Cuba were obtained by rearing adults in the laboratory. Eggs of Hydraena perkinsi Spangler, 1980, H. decui Spangler, 1980 and H. franklyni Deler-Hernández & Delgado, 2012 are described and illustrated for the first time. The first instar larva of Gymnochthebius fossatus (LeConte, 1855) is redescribed, adding some new remarkable morphological characters including what could be the first abdominal egg-burster reported for this family. All larval instars of H. perkinsi, H. guadelupensis Orchymont, 1923 and Ochthebius attritus LeConte, 1878 are described and illustrated for the first time, with a special emphasis on their chaetotaxy. The second instar larva of G. fossatus along with first and third instar larvae of H. decui and H. franklyni are also studied for the first time. The pupal morphology and vestiture of a species belonging to the genus Hydraena are described for the first time, based on the pupa of H. perkinsi. Biological notes for several preimaginal stages of the studied species are also given. 

LIFE HISTORY AND HABITS OF THE WILLOW BEAKED GALL MIDGE, MAYETIOLA RIGIDAE (DIPTERA: CECIDOMYIIDAE), IN MICHIGAN

1968 ◽  
Vol 100 (2) ◽  
pp. 202-206 ◽  
Author(s):  
Louis F. Wilson
Keyword(s):  
Life History ◽  
Gall Midge ◽  
Head Capsule ◽  
Instar Larva ◽  
Larval Instars ◽  
The Third ◽  
First Instar ◽  
Salix Discolor

AbstractThe willow beaked gall midge, Mayetiola rigidae (Osten Sacken), is univoltine in Michigan. Adults emerge from bud galls on Salix discolor Mühl. and other willows on mornings of warm days in early April. Eggs are laid singly on or near the buds of the host. Head capsule measurements indicate three larval instars. The last two instars each possess a spatula. The first-instar larva emerges in late April and penetrates the soft bud tissues. The gall begins to develop at the beginning of the second instar in mid-May. The third instar appears in early July and continues to enlarge the gall until fall. Prior to overwintering, the larva lines the inner chamber of the gall with silk and constructs one to seven silken septa across the passageway. Pupation occurs in mid-March. The gall deforms the stem and occasionally a galled branch dies or breaks off.

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