STUDIES IN THE LIFE HISTORY OF TRACHYCHELE BLONDELI MARS. (COLEOPTERA)

1927 ◽  
Vol 59 (9) ◽  
pp. 201-204
Author(s):  
Geo. R. Hopping
Keyword(s):  
British Columbia ◽  
Life History ◽  
Egg Laying ◽  
Red Cedar ◽  
History Of ◽  
Western Red Cedar ◽  
Seasonal History

In connection with the investigative work on Trachychele damage to western red cedar, it became expedient to make a study of the life history of the species, Trachychele blondeli Mars., which has become very troublesome to pole operators on the Coast of British Columbia. Accordingly a study of the life history was started by the writer in 1925. In the fall of that year and during the spring and summer of 1926, the seasonal history was studied and observations were made on emergence, egg laying, and breeding habits. The exact length of time spent in the larval state is still uncertain.

STUDIES IN THE LIFE HISTORY OF TRACHYKELE BLONDELI MARSEUL

1932 ◽  
Vol 64 (8) ◽  
pp. 189-191
Author(s):  
Geo. R. Hopping
Keyword(s):  
British Columbia ◽  
Life History ◽  
Larval Stage ◽  
Red Cedar ◽  
History Of ◽  
Cheese Cloth

In connection with studies on the biology of T. blondeli, condnctec in the years 1926 to 1930 inclusive, at Pender Harbour, British Columbia, red cedar trees were inclosed in cheese-cloth cages with a view to determining the duration of the larval stage. The cages were constructed prior to April 30, 1926, and the emergence of bettles from the trees was recorded.

Life History and Habits of a Midge, Phytophaga thujae Hedlin (Diptera: Cecidomyiidae) in Western Red Cedar Cones

1964 ◽  
Vol 96 (7) ◽  
pp. 950-957 ◽  
Author(s):  
A. F. Hedlin
Keyword(s):  
British Columbia ◽  
Life History ◽  
Larval Stage ◽  
Late Summer ◽  
Vancouver Island ◽  
Thuja Plicata ◽  
Mortality Factors ◽  
Pupal Development ◽  
Red Cedar ◽  
Western Red Cedar

AbstractThe midge, Phytophaga thujae Hedlin, is a common pest in cones of western red cedar, Thuja plicata Donn. In some years nearly 100% of cones in localities on Vancouver Island, British Columbia, are infested.Adults emerge in March and April to oviposit on young cones. Eggs hatch during April and May. Larvae feed on seeds and scales, and in late summer spin cocoons in the cones, in which to overwinter. Prepupal and pupal development occur during winter.Mortality factors include parasites and competition. Species of Torymus and Tetrastichus parasitize larvae of the midge. In years of severe infestation, competition in early stages can cause considerable mortality.A portion of the population may remain in diapause in the larval stage each year.

scholarly journals Codling-moth Investigations of the State Entomologist's Office

1922 ◽  
Vol 14 (1-10) ◽  
pp. 219-289 ◽  
Author(s):  
P. A. Glenn
Keyword(s):  
Life History ◽  
Codling Moth ◽  
Climatic Conditions ◽  
The State ◽  
Accurate Data ◽  
Rate Of Development ◽  
History Of ◽  
Seasonal History

To secure accurate data in regard to the life history and the seasonal history of the codling-moth in Illinois, and the relation of climatic conditions to the rate of development and the time of appearance of the various stages of the insect, an investigation was begun in the spring of 1915 under the direction of Doctor S. A. Forbes, then State Entomologist.

scholarly journals NOTES ON THE LIFE-HISTORY OF AGALLIA SANGUINOLENTA, Prov.

1892 ◽  
Vol 24 (2) ◽  
pp. 35-36
Author(s):  
Herbert Osborn ◽  
H. A. Gossard
Keyword(s):  
Life History ◽  
Egg Laying ◽  
Food Plant ◽  
Stages Of Growth ◽  
Leaf Hopper ◽  
History Of

This leaf-hopper is considered a clover pest, but is also known to feed on beets, rutabagas, cabbages and blue grass. It is active even in midwinter on sunshiny days. The eggs are thrust beneath the epidermis of the food-plant, and the first brood of larvæ appears from the middle of May until July 1st. The earliest individuals of the brood are nearly mature by the first of July and are supposed to begin egg-laying a little later. Larvæ can be found in all stages of growth from this time until the advent of winter, but most of the individuals are believed to be included in two broods.

Early Ocean Life History of Harrison River Sockeye Salmon and their Contribution to the Biodiversity of Sockeye Salmon in the Fraser River, British Columbia, Canada

2016 ◽  
Vol 145 (2) ◽  
pp. 348-362 ◽  
Author(s):  
Richard J. Beamish ◽  
Chrys M. Neville ◽  
Ruston M. Sweeting ◽  
Terry D. Beacham ◽  
Joy Wade ◽  
...  
Keyword(s):  
British Columbia ◽  
Life History ◽  
Sockeye Salmon ◽  
Fraser River ◽  
History Of

Attraction of male Mayetiola thujae (Diptera: Cecidomyiidae) to the sex-pheromone blend of (2S,12S)-, (2S,13S)-, and (2S,14S)-diacetoxyheptadecane is reduced in the presence of the SR- or RR-stereoisomers

2007 ◽  
Vol 139 (5) ◽  
pp. 685-689
Author(s):  
Regine Gries ◽  
Robb G. Bennett ◽  
Grigori Khaskin ◽  
Gerhard Gries
Keyword(s):  
British Columbia ◽  
Sex Pheromone ◽  
Seed Orchard ◽  
Field Trapping ◽  
Thuja Plicata ◽  
Red Cedar ◽  
Synthetic Pheromone ◽  
Western Red Cedar ◽  
Sex Pheromone Blend ◽  
Pheromone Blend

AbstractIn a field trapping experiment in an abandoned seed orchard of western red-cedar, Thuja plicata Donn × D. Don, in British Columbia, we show that attraction of male red-cedar cone midges, Mayetiola thujae (Hedlin), to the pheromone blend (2S,12S)-, (2S,13S)-, and (2S,14S)-diacetoxyheptadecane is reduced in the presence of a blend of all other stereoisomers, or of the three SR- or RR-stereoisomers. The three RS-stereoisomers, in contrast, had no significant effect. Thus, synthetic pheromone for monitoring M. thujae populations must not contain the SR- or RR-stereoisomers of 2,12-, 2,13-, and 2,14-diacetoxyheptadecane. This result will allow development of a less expensive design for synthesizing the pheromone.

INVESTIGATIONS OF DECAY IN WESTERN RED CEDAR IN BRITISH COLUMBIA

1946 ◽  
Vol 24c (5) ◽  
pp. 158-181 ◽  
Author(s):  
D. C. Buckland
Keyword(s):  
British Columbia ◽  
Growth Increment ◽  
White Rot ◽  
Thuja Plicata ◽  
Acid Media ◽  
Butt Rot ◽  
Armillaria Mellea ◽  
Red Cedar ◽  
Ring Rot ◽  
Western Red Cedar

Investigations of decay in Thuja plicata D. Don. in British Columbia have shown that the major heart-rotting fungi of living western red cedar on the Coast, in decreasing order of importance, are Poria asiatica (Pilát) Overh. (brown cubical pocket and butt rot), Poria albipellucida Baxter (white ring rot), Fomes Pini (Thore) Lloyd (white pitted trunk rot), Merulius sp. (brown crumbly butt rot), and Poria subacida (Peck) Sacc. (spongy white rot). In the Interior of the Province they are Poria asiatica, P. Weirii Murr. (yellow ring rot), Fomes Pini, Polyporus balsameus Peck (brown cubical butt rot), Merulius sp., and Poria subacida. Other fungi attacking the heartwood of living trees less extensively are Fomes annosus (Fr.) Cke., F. nigrolimitatus (Romell) Egel., F. pinicola (Sw.) Cke., Armillaria mellea (Fr.) Quél., Omphalia campanella (Fr.) Quél., Polyporus Schweinitzii Fr., and Coniophora cerebella Pers.On the areas investigated, loss through decay in stands 50 to 450 years of age never exceeded growth increment. It was indicated that decay in younger stands was of importance. Loss through decay and incidence of infection was appreciably higher in the Interior than on the Coast. No reliable external indications of decay in the standing tree were found.Deterioration in felled trees was caused by Poria Weirii, P. albipellucida, P. subacida, Armillaria mellea, Omphalia campanella, Fomes annosus, F. nigrolimitatus, and F. pinicola. Polyporus cuneatus (Murr.) Overh., and Hymenochaete tabacina (Sow.) Lév. were the major decay organisms of cedar sapwood and slash. Polyporus abietinus (Dicks.) Fr., P. versicolor (L.) Fr., P. semipileatus Peck, P. hirsutus (Wulf.) Fr., and Poria isabellina (Fr.) Overh. were restricted in distribution or of irregular occurrence.To assist in the identification of cultures all the major heart-rotting organisms were grown on tannic and gallic acid media. Seventy-seven species of Basidiomycetes were collected on living and dead Thuja plicata in British Columbia from 1943 to 1945.

Comparison of Drying Rates of Ground Western Red Cedar with Hemlock, Birch, Aspen, and Spruce/Pine/Douglas Fir

2020 ◽  
Vol 36 (2) ◽  
pp. 159-165 ◽  
Author(s):  
Hamid Rezaei ◽  
Jim Lim ◽  
Shahab Sokhansanj
Keyword(s):  
British Columbia ◽  
Wood Species ◽  
Smoke Point ◽  
Douglas Fir ◽  
Drying Rate ◽  
Small Particles ◽  
Drying Time ◽  
Red Cedar ◽  
Western Red Cedar ◽  
Drying Rates

HighlightsWRC and SPF generate the largest fraction of small particles (<0.5 mm) during grinding.WRC is slightly low in total sugars, high in lignin content (should make durable pellets), and high in extractives.Aspen followed by WRC has the highest drying rate and the shortest drying time amongst all samples.Smoke point is similar for all wood species and is ~180°C.Abstract.Western red cedar () and yellow cedar () are among the most valuable tree species in British Columbia. These species make up about 20% of the coastal timber volumes and mostly are used as lumber for construction applications where resistance against decay is important. The use of red cedar for pellet production has been uncertain because it appears cedar has a tendency to cause fires in rotary drum dryers when compared to other wood species like pine and Douglas Fir. The scientific reasons for the reported fire incident are not known. The goal of the current study is to investigate the drying rates and the range of combustion temperature for western red cedar and five other wood species that either are used or have potential to be used for palletization purposes in British Columbia. Red cedar and Spruce/Pine/Fir (SPF) generate the largest fraction of small particles (<0.5 mm) during grinding. Almost 93% of cedar particles are less than 1 mm. Cedar has a high carbon content and low oxygen content that causes cedar has higher calorific value than other species. During a drying process, aspen following by cedar has the highest drying rate and the shortest drying time amongst all samples. The smoke point is similar for all wood species and is ~180°C. So, in the case of high temperature drying (beyond the smoke point) of mixed feedstocks with similar size, red cedar dries faster and starts smoking at dryer output. Keywords: Chemical composition, Drying rate, Physical characterization, Smoke point, Western red cedar.

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