Parasitism and phenology of Dasineura mali (Diptera: Cecidomyiidae) in Canadian apple (Rosaceae) orchards

2020 ◽  
Vol 152 (3) ◽  
pp. 355-373
Author(s):  
J.E. Cossentine ◽  
A.M. Brauner ◽  
J.L. Franklin ◽  
M.C. Robertson ◽  
P.N. Buhl ◽  
...  
Keyword(s):  
British Columbia ◽  
Nova Scotia ◽  
Molecular Analysis ◽  
Malus Domestica ◽  
Pheromone Trap ◽  
The Third ◽  
Alien Pest ◽  
First Time ◽  
Fraser Valley ◽  
Dasineura Mali

AbstractThe apple leaf midge, Dasineura mali (Kieffer) (Diptera: Cecidomyiidae), an invasive alien pest established for many years in Nova Scotia, Canada, has invaded Ontario and British Columbia, Canada apple (Malus domestica Borkhausen; Rosaceae) orchards, damaging growing tips of trees. Molecular analysis indicated that Nova Scotia populations are genetically different from Ontario and British Columbia populations. Pheromone trap captures, oviposition on growing apple terminals, and the incidence of third instars indicate three D. mali generations in each province. Platygaster demades Walker (Hymenoptera: Platygastridae), released in Nova Scotia in 1993, parasitised 34% of the third midge generation in that province and was reared from D. mali for the first time in 2016 in the Fraser Valley of British Columbia. Lyrcus nigroaeneus Ashmead (Hymenoptera: Pteromalidae) parasitised up to 21% of D. mali in southwestern Ontario. Synopeas myles (Walker) (Hymenoptera: Platygastridae) was recorded from D. mali for the first time, one specimen in each of Nova Scotia and Ontario, and was the most important parasitoid in British Columbia. Synopeas myles parasitism in Okanagan and Similkameen, British Columbia orchards increased from 0% to a mean of 30% of D. mali larvae from 2014 to 2016. Other minor parasitoids included Platygaster tuberosula Kieffer (Hymenoptera: Platygasteridae) in all three provinces and Aphanogmus vicinus Förster (Hymenoptera: Ceraphronidae) in British Columbia.

Records of adventive aleocharine beetles (Coleoptera: Staphylinidae: Aleocharinae) found in Canada

2007 ◽  
Vol 139 (1) ◽  
pp. 54-79 ◽  
Author(s):  
Jan Klimaszewski ◽  
Volker Assing ◽  
Christopher G. Majka ◽  
Georges Pelletier ◽  
Reginald P. Webster ◽  
...  
Keyword(s):  
United States ◽  
British Columbia ◽  
Nova Scotia ◽  
North America ◽  
New Brunswick ◽  
Prince Edward Island ◽  
Anthropogenic Activities ◽  
Palaearctic Region ◽  
First Time

AbstractEight additional adventive aleocharine beetles, native to the Palaearctic region, are reported from Canada, five of them for the first time. They belong to three tribes: Crataraea suturalis (Mannerheim) (Nova Scotia, Saskatchewan, British Columbia) and “Meotica pallens (Redtenbacher)” (Ontario, British Columbia) belong to Oxypodini; Atheta (Chaetida) longicornis (Gravenhorst) (Nova Scotia, Quebec), Atheta (Thinobaena) vestita (Gravenhorst) (New Brunswick), Dalotia coriaria (Kraatz) (Alberta), Dinaraea angustula (Gyllenhal) (Nova Scotia, Prince Edward Island, Quebec, Alberta), and Nehemitropia lividipennis (Mannerheim) (New Brunswick, Nova Scotia, Prince Edward Island, Quebec, Ontario) belong to Athetini; and Homalota plana (Gyllenhal) (Nova Scotia, New Brunswick) belongs to Homalotini. These species have likely been introduced into Canada from Europe by various anthropogenic activities, and their bionomics and possible modes of introduction are discussed. For each species, a short diagnosis and habitus and genital images are provided to assist with identification. The habitus and genital images are presented here for the first time for these species in North America. New United States records are not included in the abstract.

Aircraft Design Education through Student Competitions

1996 ◽  
Vol 24 (1) ◽  
pp. 49-57 ◽  
Author(s):  
Sheldon I. Green
Keyword(s):  
British Columbia ◽  
Design Education ◽  
Aircraft Design ◽  
The Third ◽  
University Of British Columbia ◽  
Design Competition ◽  
The Usa ◽  
The University ◽  
First Time

The SAE Aero Design Competition is an annual model airplane competition sponsored by the SAE. The purpose of the competition is to design and build a model airplane, given certain constraints, that is capable of lifting the greatest possible payload. A team of students from the University of British Columbia entered, for the first time, the SAE Aero Design Competition in 1992. The UBC airplane lifted the most weight overall and won first place in the competition against a field of 60 competitors from the USA, Canada, and Europe. In 1993 a UBC team competed again, this time with a significantly improved entry. The team again lifted the most weight and again finished first. For the third year running, the UBC aircraft lifted the most weight at the competition held in 1994. This paper documents the team's experiences in these competitions, and emphasizes how the design of model airplanes for the competitions served the important didactic purpose of introducing aircraft design to the students.

IDENTIFICATION OF K DEFICIENCY IN BRITISH COLUMBIA APPLE ORCHARDS

1989 ◽  
Vol 69 (3) ◽  
pp. 715-719 ◽  
Author(s):  
G. H. NEILSEN ◽  
P. B. HOYT ◽  
E. J. HOGUE
Keyword(s):  
British Columbia ◽  
Key Words ◽  
Malus Domestica ◽  
Potassium Deficiency ◽  
Apple Orchards ◽  
Malus Domestica Borkh ◽  
Soil Potassium ◽  
K Deficiency ◽  
First Time ◽  
Orchard Soils

K deficiency was identified for the first time in British Columbia orchard soils. Greenhouse-grown apple seedlings responded to K in soils low in available K. MacSpur McIntosh (Malus domestica Borkh.) had increased leaf K (above deficiency) and improved initial fruiting after surface applications of KCl in an orchard with low soil K. Key words: Potassium deficiency, apple, leaf and soil potassium

CHEMICAL CONTROL OF THE EUROPEAN WIREWORM AGRIOTES OBSCURUS (L.) IN THE LOWER FRASER VALLEY OF BRITISH COLUMBIA

1957 ◽  
Vol 37 (4) ◽  
pp. 413-417 ◽  
Author(s):  
A. T. S. Wilkinson
Keyword(s):  
British Columbia ◽  
Chemical Control ◽  
Ethylene Dibromide ◽  
Agriotes Obscurus ◽  
The Third ◽  
Adequate Control ◽  
Good Protection ◽  
Cent Mortality ◽  
Silty Loam ◽  
Fraser Valley

The wireworm Agriotes obscurus (L.) was controlled in silty loam at Agassiz, British Columbia, from 1953 to 1956, by insecticides incorporated into the soil. Single applications of aldrin or heptachlor at 5 lb. of toxicant per acre gave good protection to potatoes planted a month after application, and gave 100 per cent mortality of wireworms by the second or third season. Aldrin at 2.5 lb., DDT at 15 lb., and granulated heptachlor at 3 lb. did not give adequate control in the year of application but gave appreciable control in the third and fourth seasons. Ethylene dibromide at 1.6 gal. per acre did not give control.

FOUR EUROPEAN SPECIES OF PSALLUS FIEBER FOUND IN CANADA (HETEROPTERA: MIRIDAE)

1983 ◽  
Vol 115 (3) ◽  
pp. 325-328 ◽  
Author(s):  
Leonard A. Kelton
Keyword(s):  
British Columbia ◽  
Nova Scotia ◽  
North America ◽  
European Species ◽  
Nursery Stock ◽  
Fourth Species ◽  
First Time ◽  
Nearctic Region

This note deals with four reddish species of European Psallus Fieber known to occur in Canada. Psallus roseus Fabricius was discovered in 1970 in British Columbia, and P. lepidus Fieber and P. jlavellus Stichel were discovered in 1976 in Nova Scotia and are now reported for the first time from the Nearctic region. They were probably introduced accidentally into this country some time ago with nursery stock. The fourth species, P. falleni Reuter, misidentified in North America as P. alnicola Douglas & Scott, is probably naturally Holarctic in distribution. The four species are redescribed, vesicae, left claspers and two adults are illustrated, and a key to separate them is provided.

Hemiflagellochloris (Chlorophyceae, Chlorophyta), a new for Russian flora genus of green algae

2014 ◽  
Vol 48 ◽  
pp. 104-113
Author(s):  
A. D. Temraleeva ◽  
E. V. Mincheva ◽  
Yu. S. Bukin ◽  
M. V. Eltsov ◽  
V. A. Demkin ◽  
...  
Keyword(s):  
Green Algae ◽  
Molecular Analysis ◽  
18S Rdna ◽  
Phylogenetic Position ◽  
Rdna Gene ◽  
Algal Strain ◽  
The North ◽  
Volgograd Region ◽  
First Time ◽  
18S Rdna Gene

The genus Hemiflagellochloris Watanabe et al. was found in Russia for the first time. The algal strain was isolated from a buried solonetz in the zone of dry steppes (the north-end of Ergeni Hills, Volgograd Region). The morphology and ecology of this isolate are described. Its phylogenetic position within Chlorophyceae is determined by molecular analysis of 18S rDNA gene.

Early Permian fossil vertebrate footprints and their stratigraphic setting in megacyclic sequence II red beds, Prim Point, Prince Edward Island

1989 ◽  
Vol 26 (3) ◽  
pp. 591-605 ◽  
Author(s):  
David J. Mossman ◽  
Craig H. Place
Keyword(s):  
Central Europe ◽  
Prince Edward Island ◽  
River Sediments ◽  
Early Permian ◽  
Red Beds ◽  
Sparse Vegetation ◽  
The Third ◽  
Fossil Vertebrate ◽  
Crevasse Splay ◽  
First Time

Vertebrate trace fossils are reported for the first time from red beds near the top of megacyclic sequence II at Prim Point in southwestern Prince Edward Island. They occur as casts of tetrapod trackways. The ichnocoenose also includes a rich invertebrate ichnofauna. The trackmakers thrived in an area of sparse vegetation and occupied out-of-channel river sediments, most likely crevasse-splay deposits.Amphisauropus latus, represented by three trackways, has been previously reported from Germany, Poland, and Czechoslovakia. It is here interpreted as the track of a cotylosaur. It occurs together with the track of Gilmoreichnus kablikae, which is either a captorhinomorph or possibly a juvenile pelycosaur. These facilitate the assignment of a late Early Permian (late Autunian) age to the strata. The third set of footprints, those of a small herbivorous pelycosaur, compare most closely with Ichniotherium willsi, known hitherto from the Keele beds (latest Stephanian) of the English Midlands.This ichnocoenose occurs in a plate-tectonically rafted segment of crust stratigraphically equivalent to the same association of ichnofauna in the English Midlands and central Europe. The community occupied piedmont-valley-flat red beds within the molasse facies of Variscan uplands.

scholarly journals Old forest policy and regulatory frameworks in Nova Scotia and New Brunswick with a comparison to British Columbia

2018 ◽  
Vol 94 (01) ◽  
pp. 13-19 ◽  
Author(s):  
Amy Berry ◽  
Amanda Lavers ◽  
Lisa Mitchell
Keyword(s):  
British Columbia ◽  
Nova Scotia ◽  
New Brunswick ◽  
Forest Policy ◽  
Regulatory Frameworks

The influence of behaviour modifying chemicals on mating success of the red bollworm Diparopsis castanea Hmps. (Lepidoptera, Noctuidae) in Malawi

1976 ◽  
Vol 66 (2) ◽  
pp. 279-300 ◽  
Author(s):  
R. J. Marks
Keyword(s):  
Sex Pheromone ◽  
Sexual Attraction ◽  
Practical Method ◽  
Pheromone Trap ◽  
Cotton Field ◽  
Field Cage ◽  
Synthetic Sex Pheromone ◽  
Trap Catches ◽  
First Time ◽  
Lepidoptera Noctuidae

AbstractThe synthetic sex pheromone (dicastalure) of the red bollworm of cotton, Diparopsis castanea Hmps., in Central and Southern Africa, and an inhibitor of male sexual attraction (trans-9-dodecenyl acetate,=IIA), were used in an enclosed 0·2 ha cotton field-cage to reduce successful female matings. Over one month dicastalure at 21·0 and 42·3 g/ha produced average reductions in mating of 47·9% and 72·5% respectively and 37·9 g IIA/ha produced an overall reduction in mating of 71·5%, or 79·5% in released moth populations, over the same period. The proportion of virgin females present in disruption situations was significantly greater than in untreated populations and was density-independent for moth populations of up to 2 200/ha. The proportion of fertile eggs in disruption situations was correspondingly reduced to 30·2% from an average of 67·9% in control cycles. Reduction in sex pheromone trap catches is an unsatisfactory indicator of the extent to which males are prevented from inseminating females and considerably over-estimates the true degree of disruption. This is the first time that a naturally occurring inhibitor has been used successfully to disrupt mating in a field population of insects and it indicates the potential of the method for the control of high density pest populations in cotton. However, use of polyethylene dispensing mechanisms similar to those used in the field-cage disruption experiments would be unsuitable as a practical method of dispensing behaviour modifying chemicals and it is suggested that, for suitably controlled release of such chemicals, currently available microencapsulation technology offers the best prospects.

CHAETOCNEMA CONCINNA (MARSHAM, 1802), A EUROPEAN FLEA BEETLE INTRODUCED IN NORTH AMERICA (COLEOPTERA: CHRYSOMELIDAE: ALTICINAE)

1990 ◽  
Vol 122 (4) ◽  
pp. 647-650
Author(s):  
Laurent Lesage
Keyword(s):  
Nova Scotia ◽  
North America ◽  
Prince Edward Island ◽  
Host Plants ◽  
Flea Beetle ◽  
Collection Data ◽  
First Time

AbstractChaetocnema concinna (Marsham, 1802), a European flea beetle, is reported for the first time from Canada. Preliminary collection data indicate that it may feed on the same host plants as in Europe. It has been collected to date in Prince Edward Island, Nova Scotia, and Maine.

Sign in / Sign up

Export Citation Format

Share Document