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

Sunrise apple

1996 ◽  
Vol 76 (1) ◽  
pp. 165-167 ◽  
Author(s):  
W. D. Lane ◽  
R. A. MacDonald ◽  
K. O. Lapins ◽  
O. L. Lau
Keyword(s):  
Shelf Life ◽  
Key Words ◽  
Malus Domestica ◽  
Apple Cultivar ◽  
Malus Domestica Borkh ◽  
Cultivar Description ◽  
Key Words Apple

Sunrise apple (Malus domestica Borkh.) has firm, crisp fruit with bright attractive colour. It matures in mid-August. The tree is easily managed, but its fruit has a short shelf life. Key words: Apple, cultivar description

Chinook apple

1999 ◽  
Vol 79 (2) ◽  
pp. 287-289
Author(s):  
H. A. Quamme ◽  
R. A. MacDonald ◽  
W. D. Lane ◽  
C. R. Hampson
Keyword(s):  
Key Words ◽  
Malus Domestica ◽  
Storage Life ◽  
Apple Cultivar ◽  
High Quality ◽  
Malus Domestica Borkh ◽  
Cultivar Description ◽  
Long Storage

Chinook is an attractive, high-quality apple cultivar ripening after Red Delicious. It was selected for its outstanding appearance, texture and flavour and long storage life. Key words: Malus domestica Borkh., dessert apple, cultivar description

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.

Silken apple

1999 ◽  
Vol 79 (2) ◽  
pp. 295-297 ◽  
Author(s):  
H. A. Quamme ◽  
R. A. MacDonald ◽  
W. D. Lane ◽  
C. R. Hampson
Keyword(s):  
Key Words ◽  
Malus Domestica ◽  
Skin Colour ◽  
Apple Cultivar ◽  
Malus Domestica Borkh ◽  
Early Maturing ◽  
Cultivar Description ◽  
Preference Tests ◽  
Better Than

Silken is a new early-maturing apple cultivar ripening in the same season as McIntosh with a unique creamy skin colour. It is crisper and sweeter, and possesses a higher aromatic intensity than Royal Gala or McIntosh. In preference tests, it has been rated equal to Gala and better than McIntosh in Flavour and texture. It can be stored for 10 wk at 0 °C. Key words: Malus domestica Borkh., dessert apple, cultivar description

SHORT COMMUNICATION: Soil chemical changes associated with NP-fertigated and drip irrigated high-density apple orchards

1995 ◽  
Vol 75 (3) ◽  
pp. 307-310 ◽  
Author(s):  
G. H. Neilsen ◽  
P. B. Hoyt ◽  
D. Neilsen
Keyword(s):  
Key Words ◽  
Malus Domestica ◽  
Drip Irrigation ◽  
Short Communication ◽  
High Density ◽  
Chemical Degradation ◽  
Nutrient Concentrations ◽  
Chemical Changes ◽  
Malus Domestica Borkh ◽  
Leaf Nutrient Concentrations

Soil was sampled in 20 high-density apple (Malus domestica Borkh.) orchards which had generally been NP-fertigated using drip irrigation for the 2–5 yr since their establishment. Soil chemical changes including decreases in pH, extractable Ca, Mg, K, S and B and increases in extractable Cu, Mn and Fe were measurable, often within 2 yr. Leaf nutrient concentrations below deficiency levels were widespread for B and Zn and in a few cases, also occurred for Mg and K. Key words: Fertigation, soil chemical degradation, apple, drip irrigation

Weather conditions associated with apple production in the Okanagan Valley of British Columbia

1999 ◽  
Vol 79 (1) ◽  
pp. 129-137 ◽  
Author(s):  
J. M. Caprio ◽  
H. A. Quamme
Keyword(s):  
British Columbia ◽  
High Temperatures ◽  
Malus Domestica ◽  
Research Centre ◽  
Flower Bud ◽  
Malus Domestica Borkh ◽  
Good Production ◽  
Warm Weather ◽  
Apple Production ◽  
Okanagan Valley

An analytical method that generates χ2 indices of association was used to determine the "critical" levels of daily weather occurrences associated with annual variations in apple production (Malus domestica Borkh.) in the Okanagan Valley of British Columbia over a 72-yr period, 1920–1991. The weather was recorded in the centre of the region (the Pacific Agri-Food Research Centre, Summerland). High temperatures during flower bud initiation in June (≥30 °C) and during flower bud development in August (≥26 °C) were associated with poor production the following year. Low temperature during November, December and February (critical value range, ≤ −7 °C to ≤ −29 °C) was the main climatic factor limiting apple production. These time periods correspond to the occurence of historical winter injury events. Daytime temperatures ≥5 °C at times during January also affects apple production adversely, probably because warm weather leads to tree deacclimation. Daily precipitation in March (≥1.0 mm) was associated with good production years which may indicate a requirement for early irrigation. Production was favoured by mild temperatures during bloom (≥21 °C daytime, ≥11 °C nighttime) and adversely affected by both very low temperatures (≤10 °C nighttime) and unseasonably high temperatures (≥28 °C daytime) coinciding with the temperature requirements of pollination and pollen tube growth. Good production years were also associated with a lack of low nighttime temperature (≤5 °C) in spring, probably associated with frost in low lying areas. Hot, dry weather during August of the harvest year (≥33 °C daytime, ≤2 mm) had a negative impact on apple production possibly because of loss in net photosynthesis, lower fruit size or apple sunburn. Warm weather during harvest (≥17 °C daytime) favoured production, probably because of improved conditions for harvest operations and low fruit losses from autumn frosts. Key words: Malus domestica Borkh., tree fruit, climate, heat stress, spring frost, winter injury

Creston apple

1999 ◽  
Vol 79 (2) ◽  
pp. 291-294
Author(s):  
H. A. Quamme ◽  
K. O. Lapins ◽  
H. Schmidt ◽  
R. A. MacDonald ◽  
W. D. Lane ◽  
...  
Keyword(s):  
Key Words ◽  
Malus Domestica ◽  
Apple Cultivar ◽  
Controlled Atmosphere ◽  
Storage Quality ◽  
High Quality ◽  
Controlled Atmosphere Storage ◽  
Malus Domestica Borkh ◽  
Atmosphere Storage ◽  
And Storage

Creston is a new high-quality apple cultivar ripening 6 d before Red Delicious. It is large-fruited and similar to Jonagold in appearance but possesses better firmness and storage quality. It can be held for 8 wk in air storage (0 °C) and 4–5 mo in controlled-atmosphere storage. Key words: Malus domestica Borkh., dessert apple, cultivar descriptionnot available

Certain chemical thinning treatments advance maturity of Paulared apple

2001 ◽  
Vol 81 (3) ◽  
pp. 499-501 ◽  
Author(s):  
Charles G. Embree ◽  
Douglas S. Nichols ◽  
John M. DeLong ◽  
Robert K. Prange
Keyword(s):  
Adverse Effects ◽  
Key Words ◽  
Malus Domestica ◽  
Fruit Size ◽  
Fruit Colour ◽  
Apple Trees ◽  
Crop Load ◽  
Malus Domestica Borkh ◽  
Fruit Maturity ◽  
Napthaleneacetic Acid

Mature Paulared (Malus ×domestica Borkh L.)/MM106 apple trees with a heavy bloom were sprayed with carbaryl [Sevin® XLR 1.25 mL L–1 (600 mg L–1 a.i.)], benzyladenine (BA)/gibberellic acids (GA4 + 7) [Accel® 1.22 mL L–1 (23.1 mg L–1/2.31 mg L–1 a.i.)], carbaryl [Sevin® XLR 1.25 mL L–1 (600 mg L–1 a.i.)] + BA/GA4 + 7 [Accel® 1.22 mL L–1 (15.6 mg L–1/1.56 mg L–1 a.i.)] and napthaleneacetic acid (NAA) [FruitoneN® 0.32 g·L–1 (1.13 mg L–1 a.i.)] when fruitlet diameter was 7 mm. Ethephon [Ethrel® 2.29 mL L–1 (549.6 mg L–1 a.i.)] was applied at the 13.5 mm fruitlet diameter stage. Carbaryl alone, NAA and ethephon all resulted in improved fruit size at harvest, whereas BA/GA4 + 7 was ineffective as a thinner and did not alter fruit size at harvest. Of these treatments, only ethephon significantly reduced crop load. Both NAA and ethephon, and especially ethephon, advanced fruit maturity at harvest as indicated by a lower Streif index. Only ethephon increased commercial levels of fruit colour and following-year blossom density. Thus, while ethephon appears promising as a fruitlet thinner and a promoter of maturity for this cultivar, these effects will have to be balanced against possible adverse effects on storage and shelf life. Key words: Crop load, carbaryl, ethephon, apple maturity, Streif index

scholarly journals Вплив позакореневої обробки насаджень яблуні (malus domestica borkh.) біопрепаратами на формування показників якості плодів

2016 ◽  
pp. 107-112
Author(s):  
Ю. Ю. Вінцковська
Keyword(s):  
Organic Acids ◽  
Quality Indicators ◽  
Malus Domestica ◽  
Foliar Application ◽  
Sugar Content ◽  
Apple Orchards ◽  
Malus Domestica Borkh ◽  
Second Wave ◽  
Vapor Gard

Наведено результати досліджень (2013–2015 рр.)  щодо визначення впливу позакореневої обробки дерев яблуні  препаратами «Атонік Плюс» і «Вапор Гард» на формування показників якості плодів (вміст сухих розчинних речовин (СРР), органічних титрованих кислот і цукрів). Об’єктом був літній сорт Ямба.  Встановлено, що застосування першого з названих препаратів  перед другою хвилею опадання зав’язі та збором урожаю сприяло збільшенню кількості сухих розчинних речовин і цукрів та зменшенню накопичення органічних титрованих кислот у плодах, і тим самим покращенню смакових якостей останніх. У разі обробки антитранспірантом «Вапор Гард» під час першої хвилі опадання зав’язі та перед збиранням плодів у них підвищився вміст цукрів порівняно з контролем. The author presents the results of studying (2013–2015) the effects of the biological preparations «Atonik Plus» and «Vapor Gard» foliar application in apple orchards on the formation of fruits quality indicators (the content of dry soluble substances, organic titrate acids and sugars). The object of the research was the summer variety Yamba. The usage of «Atonik Plus» before the second wave of the ovary abscission and harvesting the crop increased the content of dry soluble substances and sugars, and reduced the accumulation of titrated organic acids in fruits. This application improved their taste. The best variant of the antitranspirant «Vapor Gard» was spraying at the first wave of the ovary abscission and before harvesting, namely: the sugar content in fruits increased as it is compared to the control.

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