The Instars of a Maggot (Pegohylemyia) Inhabiting White Spruce Cones

1954 ◽  
Vol 86 (4) ◽  
pp. 185-189 ◽  
Author(s):  
Howard A. Tripp
Keyword(s):  
Life Cycle ◽  
Picea Glauca ◽  
Adult Stage ◽  
White Spruce ◽  
Free Living ◽  
Single Male ◽  
Male Specimen ◽  
Southern Ontario ◽  
First Instar ◽  
Third Instar Larvae

Maggots of Pegohylemyia sp. have been found inhabiting the cones of white spruce, Picea glauca (Moench.) Voss, in southern Ontario. The species was identified from a single male specimen as probably Pegohylemyia anthracina Czerny by the Swedish authority Dr. O. Ringdahl. Difficulty in rearing the maggots to the adult stage has delayed confirmation of this identification but it is expected that a good series of adults will be available shortly. In this paper, however, the emphasis is placed on the instars with an outline of the life cycle. It is shown that the second- and third-instar larvae are free-living, but the first-instar larvae moult to the second within the egg chorion.

Pucciniastrum americanum. [Descriptions of Fungi and Bacteria].

1969 ◽  
Author(s):  
G. F. Laundon
Keyword(s):  
New York ◽  
British Columbia ◽  
Life Cycle ◽  
Nova Scotia ◽  
Leaf Rust ◽  
Geographical Distribution ◽  
Picea Glauca ◽  
Yellow Rust ◽  
White Spruce ◽  
Rubus Idaeus

Abstract A description is provided for Pucciniastrum americanum. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Pycnia and aecia on Picea glauca (=P. canadensis), uredia and telia on Rubus idaeus (incl. R. strigosus) and R. leucodermis (raspberries). DISEASE: Needle rust of white spruce. Late leaf rust or late yellow rust of raspberry, infecting canes, leaves, petioles, calyces and fruits. GEOGRAPHICAL DISTRIBUTION: Canada and U.S.A. (widely distributed, recorded from British Columbia, Connecticut, Idaho, Illinois, Iowa, Mass., Md, Me, Montana, North Dakota, New Hamp., New Jersey, Nova Scotia, New York, Ohio, Ontario, Quebec, Vermont, Wisconsin, West Virginia). TRANSMISSION: Although the basidiospores infect Picea glauca (white spruce) (Darker, 1929) in some areas they probably play little part in the life cycle on raspberry since this rust is found on the latter host year after year in regions remote from any spruce trees (Anderson, 1956).

Isoenzyme complexes as indicators of genetic diversity in white spruce, Picea glauca, in southern Ontario and the Yukon Territory. Formic, glutamic, and lactic dehydrogenases and cationic peroxidases

1978 ◽  
Vol 56 (1) ◽  
pp. 80-90 ◽  
Author(s):  
Ruey C. Tsay ◽  
Iain E. P. Taylor
Keyword(s):  
Genetic Diversity ◽  
Genetic Resources ◽  
Picea Glauca ◽  
White Spruce ◽  
Yukon Territory ◽  
Southern Ontario ◽  
Centre Of Diversity ◽  
Neighbouring Region

A centre of genetic diversity for white spruce, Picea glauca (Moench) Voss, is suspected in and around a refugial region in the Yukon Territory. Seed from the refugium (30 samples), a neighbouring region (42 samples) and from southern Ontario (50 samples) was examined for isoenzymes of formic (FDH), glutamic (GDH), and lactic (LDH) dehydrogenases and cationic peroxidases (CP). FDH patterns were uniform. There were three GDH bands which appeared in five patterns. Eleven isoenzymes of LDH were detected in 21 patterns. There were 25 CP bands and the pattern from each collection (containing 7–13 bands) was unique.The results from GDH, LDH, and CP analyses revealed differences between seed from the refugium and the adjoining regions. The patterns for LDH supported the hypothesis that the refugium was a centre of diversity but the GDH and CP patterns were more diverse outside the refugium. The LDH and CP analyses showed that the genetic resources of the two regions in the Yukon were more diverse than those in southern Ontario. Analysis of divergence showed that these differences were significant at the 1% level of probability.

Notes on Some Branchial Isopods Parasitic on Upogebiid Mud-Shrimps (Decapoda: Thalassinidea)

1996 ◽  
Vol 76 (3) ◽  
pp. 821-824 ◽  
Author(s):  
C.M. Astall ◽  
A.C. Taylor ◽  
R.J.A. Atkinson
Keyword(s):  
Short Note ◽  
Ventral Surface ◽  
Irish Sea ◽  
Free Living ◽  
Single Male ◽  
Brood Chamber ◽  
Male Specimen ◽  
Parasite Relationship ◽  
The Irish Sea ◽  
The University

Bopyrids are highly modified epicaridean isopod ectoparasites with the adult females showing extreme specialization of body form when compared with free-living isopods (Shiino, 1965). The smaller males are similar to free-living isopods, retaining the basic cryptoniscus larval form (Naylor, 1972), and are typically found in the brood chamber of the female or attached to the ventral surface of the female's pleon (Salazar-Vallejo & Leija-Tristán, 1989).Whilst examining the branchial morphology of the upogebiids, Upogebia stellata (Montagu), Upogebia deltaura (Leach) and Upogebia pusilla (Petagna) as part of a wider study of the physiological ecology of thalassinidean mud-shrimps, some shrimps were observed to have a branchial gall (distended branchiostegite) containing a bopyrid parasite. In this short note we add to the previous records of two bopyrid species and briefly discuss the host/parasite relationship.Parasitized material examined: U. stellata (three males, two females) collected subtidally using an anchor dredge from White Bay, Isle of Cumbrae, Scotland (55°48'N 4°55'W) at depths of 25–30 m. A single male specimen of U. deltaura was caught using a box corer from the Irish Sea (54°7'N 3°27'W). Upogebia pusilla (one male, one female) were collected intertidally from the Arcachon Basin, France (44°40'N l°10'W) by Professor J.P. Truchot. Prior to examination, the mud-shrimps were preserved in 10% buffered formalin, the parasites removed, rinsed with distilled water and transferred to 70% ethanol. Some preserved material was also available from the Robertson Collection housed at the University Marine Biological Station Millport.Parasitized mud-shrimps had an enlarged branchial chamber, or branchial gall, a result of branchiostegite deformation caused by the presence of the parasite. When the parasite was removed from the branchial chamber, the gills appeared splayed and flattened but showed no other signs of disturbance or damage.

Predicting defoliation by Choristoneura biennis (Lepidoptera: Tortricidae)

2003 ◽  
Vol 135 (6) ◽  
pp. 903-907 ◽  
Author(s):  
V.G. Nealis ◽  
R. Turnquist
Keyword(s):  
British Columbia ◽  
Life Cycle ◽  
Linear Regression ◽  
Picea Glauca ◽  
Spruce Budworm ◽  
White Spruce ◽  
Prediction Intervals ◽  
Abies Lasiocarpa ◽  
Independent Data ◽  
Subalpine Fir

AbstractThe 2-year-cycle spruce budworm, Choristoneura biennis Free. (Lepidoptera: Tortricidae), causes defoliation of spruce – subalpine fir forests in British Columbia, Canada. Historical and newly obtained data were used to develop a linear regression relating percent defoliation in the 2nd feeding year of the life cycle to the percentage of shoots damaged in the previous, 1st feeding year of the life cycle. The resulting regression was tested with independent data and correctly predicted (95% prediction intervals) defoliation in 14 of 15 stands. Patterns of defoliation were similar on white spruce, Picea glauca (Moench) Voss (Pinaceae), and subalpine fir, Abies lasiocarpa (Hook.) Nutt. (Pinaceae), and hence the regression can be used for either mixed or pure stands of either species.

scholarly journals Status of research on the development of management tactics and strategies for the spruce bud moth in white spruce plantations

1992 ◽  
Vol 68 (5) ◽  
pp. 614-622 ◽  
Author(s):  
Jean J. Turgeon
Keyword(s):  
Life Cycle ◽  
Economic Impact ◽  
Picea Glauca ◽  
White Spruce ◽  
Larval Feeding ◽  
Eastern Canada ◽  
Tree Form ◽  
Vertical Growth ◽  
Economic Threat ◽  
Management Tactics

The spruce bud moth, Zeiraphera canadensis, represents an economic threat to white spruce, Picea glauca, managed for lumber production in eastern Canada. Larvae feed on developing shoots. Larval feeding on the leader adversely affects tree form and reduces vertical growth. Although the economic impact of this insect has not been critically established, it is feared that this damage could decrease the quality and value of the lumber produced and could delay harvest by several years. This paper reviews the information on the spruce bud moth life cycle, behaviour, impact, sampling and monitoring, and the possible management tactics investigated to date.

Inland spruce cone rust, Chrysomyxa pirolata, in Pyrola asarifolia and cones of Picea glauca, and morphology of the spore stages

1984 ◽  
Vol 62 (11) ◽  
pp. 2441-2447 ◽  
Author(s):  
Jack R. Sutherland ◽  
Sarah J. Hopkinson ◽  
S. H. Farris
Keyword(s):  
Electron Microscope ◽  
Life Cycle ◽  
Scanning Electron Microscope ◽  
Picea Glauca ◽  
White Spruce ◽  
Field Observations ◽  
Spore Morphology ◽  
Fruiting Bodies ◽  
Current Growth ◽  
Scanning Electron

Intact and sectioned specimens were examined by using a light and a scanning electron microscope to determine the presence and spore morphology of inland spruce cone rust, Chrysomyxa pirolata Wint., in Pyrola asarifolia Michx. plants and in white spruce, Picea glauca (Moench) Voss, cones. Field observations of rust development and sporulation were made throughout the year. The microscope studies confirmed that C. pirolata is systemic and perennial in shoots and connecting rhizomes of P. asarifolia, indicating that one mode of fungus spread is between plants originating from the same rhizome. Sometimes, hyphae of C. pirolata occurred only at the nodes along part of a rhizome connecting diseased P. asarifolia plants. Spring-collected buds from diseased P. asarifolia contained C. pirolata mycelium, but the fungus was not evident externally on current growth until the following spring. However, all leaves, especially those produced in the current year, on these plants were more upright and their upper surface less shiny. In some years, all P. asarifolia leaves in a locality bore mostly uredinia or telia; at other times about equal numbers of both were present on each leaf. About 6 weeks after telial production, spermogonia appeared on nearby spruce cones and about 4 weeks later these cones bore aeciospores on most scales of the systemically infected cones. Fruiting bodies and spores for each stage of the life cycle of the fungus are illustrated.

Late Wisconsin white spruce (Picea glauca (Moench) Voss) at Brampton, Ontario

1980 ◽  
Vol 17 (8) ◽  
pp. 1087-1095 ◽  
Author(s):  
J. Terasmae ◽  
H. L. Matthews
Keyword(s):  
Picea Glauca ◽  
Lower Boundary ◽  
Lake Ontario ◽  
White Spruce ◽  
Glacial Lake ◽  
Silty Clay ◽  
Southern Ontario ◽  
Pollen Zone ◽  
Minimum Age ◽  
Shrub Tundra

Study of late Wisconsin deposits in a small bog on the crest of Brampton esker (mantled by the Halton Till), about 30 km west of Toronto, Ontario, yielded a radiocarbon date of 12 320 ± 360 years BP (BGS-551) for a sample of white spruce cones that contained fully-developed seeds. This date on cones (in gyttja) provides an estimate of minimum age for the lower boundary of the spruce pollen zone in southern Ontario. Silty clay beneath the gyttja yielded leaves of Dryas integrifolia and pollen assemblages (a herb pollen zone) that indicate presence of a dwarf-shrub tundra (essentially treeless) type of vegetation.This study supports the Port Huron Stadial age (about 13 000 years BP) of the Halton Till that underlies the silty clay, and suggests an age of between 12 500 – 13 000 years BP for glacial Lake Peel in the Brampton area that preceded the glacial Lake Iroquois phase in the Lake Ontario basin.

Macrotylus (Alloeonycha) xantii Günther, 2018, (Hemiptera: Miridae, Phylinae) new to Portugal, with a description of the female

2019 ◽  
Vol 155 (1) ◽  
pp. 65-69
Author(s):  
Stuart Foster
Keyword(s):  
Habitat Preferences ◽  
Single Male ◽  
Male Specimen ◽  
Sandy Substrate

The plant bug Macrotylus (Alloeonycha) xantii Günther, 2018, is reported as new to Portugal from the Algarve. This species was described from a single male specimen captured on dry grass in a calcareous area of Andalusia, Spain. The female was previously unknown, so the presence of both sexes in reasonable numbers on sparsely vegetated sandy substrate in Portugal extends its known range and habitat preferences, and has enabled the female to be described.

Sign in / Sign up

Export Citation Format

Share Document