Initiation and development of the stem gall induced by Hemadas nubilipennis (Hymenoptera: Pteromalidae) on lowbush blueberry, Vaccinium angustifolium (Ericaceae)

Hemadas nubilipennis Ashmead, a tiny chalcid wasp, induces a multichambered, reniform gall at the tips of vegetative shoots of Vaccinium angustifolium Aiton (lowbush blueberry). The life cycle of H. nubilipennis and the anatomical changes occurring within the shoots during gall development are described. Growth of attacked shoots is terminated by growth of the gall. Some aspects of gall growth and development are similar to those of galls induced by cynipid wasps, even though chalcids and cynipids are distantly related. Proliferation of insect-induced gall cells begins before the eggs of H. nubilipennis hatch, and by the time the larvae begin to feed, they are surrounded by thick layers of parenchymatous cells. Nutritive cells are differentiated from gall parenchyma, and as the gall matures, a layer of sclerenchymatous cells is differentiated and circumscribes each larval chamber.

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Inhibition of Tulane Virus replication via exposure to lowbush blueberry (Vaccinium angustifolium) fractional components

Journal of Berry Research ◽

10.3233/jbr-170164 ◽

2017 ◽

Vol 7 (4) ◽

pp. 281-289 ◽

Cited By ~ 2

Author(s):

David F. Bridges ◽

Anna Breard ◽

Alison Lacombe ◽

Don C. Valentine ◽

Shravani Tadepalli ◽

...

Keyword(s):

Virus Replication ◽

Vaccinium Angustifolium ◽

Lowbush Blueberry ◽

Tulane Virus

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INORGANIC NITROGEN LEVELS AND NITRIFICATION POTENTIAL IN LOWBUSH BLUEBERRY SOILS

Canadian Journal of Soil Science ◽

10.4141/cjss88-006 ◽

1988 ◽

Vol 68 (1) ◽

pp. 63-75 ◽

Cited By ~ 8

Author(s):

LEONARD J. EATON ◽

DAVID G. PATRIQUIN

Keyword(s):

Ammonium Nitrate ◽

Ammonium Sulfate ◽

Soil Nitrogen ◽

Plant Uptake ◽

Inorganic Nitrogen ◽

Garden Soil ◽

Laboratory Studies ◽

Vaccinium Angustifolium ◽

Nitrogen Levels ◽

Lowbush Blueberry

Soil ammonium and nitrate in the top 15 cm of soil were monitored after application of ammonium nitrate and ammonium sulfate to plots at 14 PF (previously fertilized) and 12 NF (never fertilized) lowbush blueberry (Vaccinium angustifolium Ait.) stands representing a range of soil types and management histories. Overall, nitrate values in unfertilized and ammonium sulfate plots were higher at PF than at NF sites, suggesting greater nitrification at PF sites. In laboratory incubation studies, nitrification proceeded immediately in soil from a PF site, but only after a 4-wk lag in that from an adjacent NF site. Nitrification rates were low compared to that in a garden soil (pH 6.6). N-Serve inhibited nitrification in both soils. In ammonium nitrate plots, "excess" N values (N values in fertilized plots minus values in unfertilized plots) were higher for PF than for NF sites, suggesting greater immobilization, plant uptake or loss of N at NF sites. There was no evidence, in laboratory studies, of immobilization of added N by soil from either type of site. Rhizome N concentration increased significantly in response to fertilization at an NF site, but not at a PF site. Key words: Blueberry (lowbush), fertilizer and soil nitrogen

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Studies on the flowering biology of red sorrel (Rumex acetosella) ramets from lowbush blueberry (Vaccinium angustifolium) fields in Nova Scotia, Canada

Botany ◽

10.1139/cjb-2014-0123 ◽

2015 ◽

Vol 93 (1) ◽

pp. 41-46 ◽

Cited By ~ 2

Author(s):

Scott N. White ◽

Nathan S. Boyd ◽

Rene C. Van Acker ◽

Clarence J. Swanton

Keyword(s):

Nova Scotia ◽

Combined Effects ◽

Perennial Species ◽

Weed Species ◽

Vaccinium Angustifolium ◽

Perennial Weed ◽

Flowering Response ◽

Lowbush Blueberry ◽

Rumex Acetosella

Red sorrel (Rumex acetosella L.) is a ramet-producing herbaceous creeping perennial species commonly found as a weed in commercially managed lowbush blueberry (Vaccinium angustifolium Aiton) fields in Nova Scotia, Canada. Flowering and seed production occur primarily in overwintering ramets of this species, indicating a potential vernalization requirement for flowering. This study was therefore initiated to examine the role of vernalization, photoperiod, and pre-vernalization stimulus on ramet flowering. Red sorrel ramets propagated from creeping roots and seeds collected from established red sorrel populations in lowbush blueberry had an obligate requirement for vernalization to flower. Ramet populations maintained under pre- and post-vernalization photoperiods of 16 h flowered following 12 weeks of vernalization at 4 ± 0.1 °C, whereas those maintained under constant 16, 14, or 8 h photoperiods without vernalization did not flower. Vernalization for 10 weeks maximized, but did not saturate, the flowering response. Pre-vernalization photoperiod affected flowering response, with increased flowering frequency observed in ramet populations exposed to decreasing, rather than constant, photoperiod prior to vernalization. This study represents the first attempt to determine the combined effects of vernalization and photoperiod on red sorrel flowering, and the results provide a benchmark for the future study of flowering and sexual reproduction in this economically important perennial weed species.

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Response of lowbush blueberry (Vaccinium angustifolium) to hexazinone applied early in the fruiting year

Canadian Journal of Plant Science ◽

10.4141/p01-188 ◽

2002 ◽

Vol 82 (4) ◽

pp. 781-783 ◽

Cited By ~ 6

Author(s):

K. I. N. Jensen ◽

E. G. Specht

Keyword(s):

Key Words ◽

Weed Control ◽

Corolla Tube ◽

Growth Stages ◽

Vaccinium Angustifolium ◽

Floral Buds ◽

Perennial Weeds ◽

Lowbush Blueberry ◽

Herbaceous Perennial

Spring application of 1.0 kg ha-1 hexazinone to fruiting-year lowbush blueberry no later than the F3 floral stage, when floral buds separate, but before the corolla tube shows white, controlled some common herbaceous perennial weeds without injury to the crop. Key words: Herbicide injury, growth stages, weed control, hexazinone, Vaccinium angustifolium

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Long-term effects of herbicide and fertilizers on lowbush blueberry growth and production

Canadian Journal of Plant Science ◽

10.4141/cjps94-066 ◽

1994 ◽

Vol 74 (2) ◽

pp. 341-345 ◽

Cited By ~ 18

Author(s):

Leonard J. Eaton

Keyword(s):

Reproductive Development ◽

Fresh Fruit ◽

Long Term Effects ◽

Vaccinium Angustifolium ◽

Nitrogen Levels ◽

Lowbush Blueberry ◽

Production Cycles ◽

Npk Fertilizer ◽

Vegetative And Reproductive Growth

Effects of herbicide and herbicide-fertilizer combinations on vegetative and reproductive growth of the lowbush blueberry (Vaccinium angustifolium Ait.) were assessed over a 12-yr period (six production cycles). All treatments stimulated stem lengths, fruit buds per stem and fresh fruit yields compared with untreated controls, but only after 3–6 yr. After the second cycle, stem lengths and fruit bud numbers were greater in herbicide + NPK-treated plants than in all others. Fresh fruit yields were variable throughout the study but were higher in herbicide and herbicide + fertilizer plots than in untreated controls after 1982, except in 1988. Nitrogen levels were greater in leaves and rhizomes of plants in all herbicide and herbicide + fertilizer plots than in control plots after 10 yr, whereas phosphorus was higher only in plants fertilized with NPK. These results suggest the lowbush blueberry responds slowly to herbicide and fertilizer applications. Increased vegetative and reproductive development, as well as denser plant stands, resulted from repeated herbicide and fertilizer applications. Fertilizers applied in conjunction with herbicides stimulate vegetative growth (and fruit buds if an NPK fertilizer), but appear to have no consistent effect on fresh fruit yields. Key words:Vaccinium angustifolium, fertilizer, herbicide, fruit buds, yield

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In Vitro Culture of Lowbush Blueberry (Vaccinium angustifolium Ait.)

Proceedings of the Ninth North American Blueberry Research and Extension Workers Conference ◽

10.1201/9781482282856-41 ◽

2004 ◽

pp. 403-418

Keyword(s):

In Vitro Culture ◽

Vaccinium Angustifolium ◽

Lowbush Blueberry

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The Open Innovation Model of Coaching Interaction in Organisations for Sustainable Performance within the Life Cycle

Sustainability ◽

10.3390/su10103516 ◽

2018 ◽

Vol 10 (10) ◽

pp. 3516 ◽

Cited By ~ 4

Author(s):

Angelina Roša (Rosha) ◽

Natalja Lace

Keyword(s):

Life Cycle ◽

Open Innovation ◽

Growth And Development ◽

Driving Forces ◽

Life Cycle Stage ◽

Sustainable Growth ◽

Business World ◽

Sustainable Performance ◽

Life Cycle Stages ◽

Innovation Model

Organizations need innovation to be competitive and sustainable on their marketplace. Sustainable performance is an important precondition for growth and development. In spite of a body of literature, non-financial factors of sustainable performance remain an open issue. Coaching has gained considerable attention in the business world for its impact on sustainable performance. The current research investigates the use of coaching interaction to facilitate organizational sustainable growth and development in the context of Miller and Friesen’s five stage life-cycle model. The expert opinion survey is chosen as a central method of research. The questionnaire is developed on the literature review that is focused on the drivers for sustainable development throughout the life cycle, and the features of coaching that accelerate these driving forces. Fifteen experts took part in the survey conducted from November 2017 to January 2018. The results are estimated by considering the competence coefficient for each expert. The findings led to creation of an open innovation model, which displays relationships between the appropriate coaching forms and types and the organizational life cycle stages. The developed model enables choosing the optimal way of coaching delivery at any life cycle stage. This model is particularly valuable for the coaching support programs.

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