scholarly journals A GRAPE LEAFHOPPER, ERYTHRONEURA ZICZAC (HOMOPTERA: CICADELLIDAE), AND ITS MYMARID (HYMENOPTERA) EGG-PARASITE IN THE OKANAGAN VALLEY, BRITISH COLUMBIA

1972 ◽  
Vol 104 (8) ◽  
pp. 1229-1233 ◽  
Author(s):  
L. M. McKenzie ◽  
Bryan P. Beirne
Keyword(s):  
British Columbia ◽  
Natural Enemy ◽  
Overlapping Generations ◽  
Adult Stage ◽  
Egg Parasite ◽  
Anagrus Epos ◽  
Grape Leafhopper ◽  
Okanagan Valley

AbstractThe leafhopper Erythroneura ziczac Walsh is the most important insect on grape in the Okanagan Valley, B.C. Hairy-leaved varieties of grape are relatively resistant to attack. The leafhopper has two overlapping generations a year and overwinters in the adult stage. Its chief natural enemy is a mymarid egg-parasite, Anagrus epos Girault, which overwinters in the eggs of other species of leaf-hoppers on wild rose and apple so that intensity of parasitism of E. ziczac can be influenced by proximity of those plants to vineyards.

Monitoring of Drosophila suzukii (Diptera: Drosophilidae) in Okanagan Valley vineyards, British Columbia, Canada, and assessment of damage to table and wine grapes (Vitaceae)

2020 ◽  
Vol 152 (4) ◽  
pp. 415-431
Author(s):  
Susanna Acheampong ◽  
Etienne Lord ◽  
D. Thomas Lowery
Keyword(s):  
British Columbia ◽  
Weather Conditions ◽  
Wine Grape ◽  
Drosophila Suzukii ◽  
Wine Grapes ◽  
Apple Cider ◽  
Table Grapes ◽  
Soft Fruit ◽  
Grape Cultivars ◽  
Okanagan Valley

AbstractSpotted-wing drosophila, Drosophila suzukii, (Matsumura) (Diptera: Drosophilidae), has become a serious pest of soft fruit in the Okanagan Valley of British Columbia, Canada since its detection in 2009. The study was conducted to determine the distribution of D. suzukii and damage levels in grapes. Apple cider vinegar-baited traps placed in table and wine grape (Vitis vinifera Linnaeus; Vitaceae) vineyards during 2011–2013 demonstrated that D. suzukii was numerous in all sites, with earliest emergence and highest numbers recorded in 2013. Drosophila suzukii were reared from intact and damaged table grapes and damaged wine grapes collected from the field, but not from intact wine grapes. Drosophila suzukii were reared in low numbers in 2011 from intact fruit of 11 wine grape cultivars exposed artificially in the laboratory. Susceptibility of intact wine grapes under laboratory conditions in 2011 when sour rot was widespread might relate in part to undetected infections of berries due to weather conditions. Identification of Drosophila Fallén species revealed that D. suzukii comprised a small portion of the total. Our results demonstrate that healthy wine grapes in the Okanagan Valley of British Columbia are largely undamaged by D. suzukii, while certain table grape cultivars should be protected from attack.

Evidence for "Caribooan Orogeny" in the Southern Okanagan Region of British Columbia

1972 ◽  
Vol 9 (12) ◽  
pp. 1693-1702
Author(s):  
John V. Ross ◽  
William C. Barnes
Keyword(s):  
British Columbia ◽  
Sedimentary Rocks ◽  
Late Paleozoic ◽  
Deformational History ◽  
Exposed Part ◽  
Strong Deformation ◽  
Paleozoic Rocks ◽  
Okanagan Valley

A sequence of non-metamorphosed, little deformed, fossiliferous, sedimentary rocks, near Keremeos, southern British Columbia, unconformably overlies rocks having a history similar to that of the Vaseaux Formation, the most westerly exposed part of the Shuswap Complex of the southern Okanagan Valley. Fossils from the younger sequence have a late Mississippian – early Pennsylvanian age.This part of the southern Okanagan region has a deformational history that is pre-mid-Carboniferous and likely related to the Caribooan orogeny. This is in contrast to Late Paleozoic rocks at northern Okanagan localities and elsewhere in British Columbia that have under-gone strong deformation of probably Mesozoic age.

K–Ar and Fission Track Geochronometry of an Eocene Thermal Event in the Kettle River (West Half) Map Area, Southern British Columbia

1975 ◽  
Vol 12 (5) ◽  
pp. 836-843 ◽  
Author(s):  
G. A. Medford
Keyword(s):  
British Columbia ◽  
Abrupt Change ◽  
Fission Track ◽  
Apatite Fission Track ◽  
Thermal Event ◽  
South Central ◽  
Early Tertiary ◽  
Okanagan Valley

The Okanagan and Similkameen plutonic complexes west of the Okanagan Valley of south-central British Columbia yield K–Ar dates that range from 185 to 133 m.y. East of the Okanagan Valley Shuswap gneisses into which the plutonics intrude, and which may be as old as pre-midCarboniferous in age yield K–Ar dates between 59.9 and 47.4 m.y. This abrupt change, which approximately coincides with the Okanagan Valley, is a consequence of an intense thermal event in the early Tertiary which has reset K–Ar dates in the gneisses at shallow depths. Comparison of K–Ar, sphene and apatite fission track dates demonstrates that the heating affected the plutons west of the Okanagan Valley and that cooling of the Shuswap gneisses occurred at a rate in excess of 25 °C. per million years. The scatter observed in the older K–Ar dates of the plutonic complexes could be caused by post-emplacement heating with variable partial argon loss rather than by separate magmatic events. Thus, only the oldesl K–Ar dates obtained from the plutons may be significant as minimum ages for emplacement.

scholarly journals Notes on Some Birds of the Okanagan Valley, British Columbia

The Auk ◽  
1919 ◽  
Vol 36 (1) ◽  
pp. 64-74 ◽  
Author(s):  
J. A. Munro
Keyword(s):  
British Columbia ◽  
Okanagan Valley
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