Effects of conifer release treatments on the growth and fruit production of Vaccinium spp. in northwestern Ontario

1998 ◽  
Vol 28 (6) ◽  
pp. 841-851 ◽  
Author(s):  
F M Moola ◽  
A U Mallik ◽  
R A Lautenschlager
Keyword(s):  
Pinus Banksiana ◽  
Dry Mass ◽  
Fruit Production ◽  
Vaccinium Angustifolium ◽  
Multiple Treatment ◽  
Growing Seasons ◽  
Northwestern Ontario ◽  
Lowbush Blueberry ◽  
Multiple Treatments ◽  
Vaccinium Myrtilloides

Berry production and vegetative recovery of lowbush blueberry (Vaccinium angustifolium Ait.) and velvet leaf blueberry (Vaccinium myrtilloides Michx.) were documented for three growing seasons (1994, 1995, 1996) after brushsaw, single operational and multiple nonoperational Vision® herbicide (active ingredient glyphosate), and control treatments in a jack pine (Pinus banksiana Lamb.) plantation in northwestern Ontario. Vaccinium angustifolium fruit production was significantly (P <= 0.05) reduced by both the single and multiple treatments in all 3 years of the study. Fruit production by V. myrtilloides was significantly (P <= 0.05) reduced only by the multiple treatment. The significant reduction in berry production by V. angustifolium contributed to an overall drop in the availability of blueberries (both species combined) on sprayed clearcuts in 1995 and 1996. Single and multiple treatments also significantly (P <= 0.05) reduced fresh mass and dry mass of total berries in 1995 and 1996. Compared with the controls, reductions in cover for both blueberry species were only significant (P <= 0.05) with the Vision® treatments. In clearcuts where V. angustifolium forms a major component of the Vaccinium spp. cover, the short-term reduction in fruit availability in sprayed areas may be considerable.

Phenology of Vaccinium spp. in a black spruce (Picea mariana) plantation in northwestern Ontario: possible implications for the timing of forest herbicide treatments

1998 ◽  
Vol 28 (10) ◽  
pp. 1579-1585 ◽  
Author(s):  
F M Moola ◽  
A U Mallik
Keyword(s):  
Leaf Senescence ◽  
Picea Mariana ◽  
Black Spruce ◽  
Target Species ◽  
Vaccinium Angustifolium ◽  
Delayed Treatment ◽  
Northwestern Ontario ◽  
Thunder Bay ◽  
Lowbush Blueberry ◽  
Vaccinium Myrtilloides

This study reports on the phenology of 180 vegetative and 180 reproductive shoots of lowbush blueberry (Vaccinium angustifolium Ait.) and velvet leaf blueberry (Vaccinium myrtilloides Michx.) in a young black spruce (Picea mariana (Mill.) BSP) plantation near Thunder Bay, northwestern Ontario. Leaves of both species emerged in mid-May and remained uniformly green until mid-August. By late August, the majority of tagged shoots had turned red and were beginning to deteriorate. Approximately 30% of tagged shoots lost their leaves by 25 September in both V. angustifolium and V. myrtilloides. Patterns of leaf development in V. angustifolium and V. myrtilloides suggest that Vaccinium spp. may be less susceptible to foliar-applied herbicides if applications are made during or following the period of leaf senescence (i.e., between late August and late September). However, delayed treatment may be impractical in conifer plantations, since the time of leaf senescence and abscission of blueberry coincides with that of many target species.

scholarly journals Effect of Fire Intensity and Depth of Burn on Lowbush Blueberry, Vaccinium angustifolium, and Velvet Leaf Blueberry, Vaccinium myrtilloides, Production in Eastern Ontario

2004 ◽  
Vol 118 (2) ◽  
pp. 195 ◽  
Author(s):  
Luc C. Duchesne ◽  
Suzanne Wetzel
Keyword(s):  
Pinus Banksiana ◽  
Prescribed Burning ◽  
Fire Intensity ◽  
Prescribed Fires ◽  
Stem Density ◽  
Vaccinium Angustifolium ◽  
Low Intensity ◽  
Lowbush Blueberry ◽  
Eastern Ontario ◽  
Vaccinium Myrtilloides

The effects of prescribed fire intensity and depth of burn were investigated on Lowbush Blueberry (Vaccinium angustifolium) and Velvet Leaf Blueberry (Vaccinium myrtilloides) stem density, blueberry production and the number of blueberries/stem in a clear-cut Jack Pine, Pinus banksiana, ecosystem of eastern Ontario. Blueberry production and stem density were significantly (P < 0.001) increased by low intensity prescribed fires of 597 and 1268 kW/m. In contrast, prescribed fires of medium and high intensities did not affect blueberry production and stem density. The number of blueberries/stem was not affected (P = 0.056) by prescribed burning, two years after treatment. Pearson's multiple correlation analysis showed that blueberry production (R: -0.683, P < 0.01), stem density (R: 0.733, P < 0.01) and the number of blueberries/stem (R: 0.803, P < 0.01) correlated with depth of burn. As well, blueberry production (R: 0.507, P < 0.05) and stem density (R: -0.504, P < 0.05) correlated with fire intensity. Depth of burn was a better predictor of berry production and stem density than fire intensity. These results suggest that only low intensity fires with little penetrating effect in the ground should be used to manage blueberry crops.

scholarly journals Biomass and Total Nonstructural Carbohydrate Partitioning in Relation to Nursery Digging Date, and Subsequent Growth, Development and Fruiting Pattern of Strawberry Runner Plants Propagated in California High-latitude Nurseries

HortScience ◽  
2006 ◽  
Vol 41 (4) ◽  
pp. 996B-996
Author(s):  
Daniel S. Kirschbaum ◽  
Kirk D. Larson ◽  
Steven A. Weinbaum ◽  
Theodore M. DeJong
Keyword(s):  
High Latitude ◽  
Soluble Sugars ◽  
Late Summer ◽  
Dry Mass ◽  
Fruit Production ◽  
Growing Seasons ◽  
Nonstructural Carbohydrate ◽  
Growth Development ◽  
One Year ◽  
Chilling Units

The pattern of total nonstructural carbohydrate [starch and soluble sugars (TNC)] accumulation in strawberry (Fragaria ×ananassa Duch.) nursery runner plants, cv. Camarosa, was determined for three growing seasons. A similar study was conducted on `Selva', but for only one year. Growth, development and fruit production patterns of plants transplanted to growth chambers (GC) or fruiting fields were also evaluated. The experiments were carried out on plants propagated in high latitude (41°50' N) nurseries in California (Siskiyou County). Plants were sampled beginning late summer through early autumn and analyzed for dry mass (DM) and TNC. Plants from different digging dates were established in GC or fruit evaluation plots in Irvine, Calif. (33°39'N). Initial TNC concentration in storage tissues at the time of nursery digging increased steadily from the second week of September to the third week of October. Crown and root TNC concentration and content were correlated positively with the accumulation of chilling units (CU = hours ≤7.2 °C) in the nursery. Root TNC concentration consistently increased from 6% to 10% DM in `Camarosa' (a short-day cultivar), and from ∼4% to 14% DM in `Selva' (a day-neutral cultivar) from mid-September to the first week of October. The root TNC content increased ∼2.5 times in `Camarosa' and ∼3.7 times in `Selva' during the same period. Transplant growth, development, and fruiting pattern were affected by digging date. Root TNC concentration and content were more sensitive to CU accumulation than crown TNC concentration and content. Therefore, root sampling appeared to be more appropriate than crown sampling for assessing the carbohydrate status and optimal digging dates of strawberry nursery runner plants early in the fall.

Morphology, phenolic content and antioxidant capacity of lowbush blueberry (Vaccinium angustifolium Ait.) plants as affected by in vitro and ex vitro propagation methods

2013 ◽  
Vol 93 (6) ◽  
pp. 1001-1008 ◽  
Author(s):  
Juran C. Goyali ◽  
Abir U. Igamberdiev ◽  
Samir C. Debnath
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Capacity ◽  
Phenolic Content ◽  
Flower Buds ◽  
Vaccinium Angustifolium ◽  
Growing Seasons ◽  
Lowbush Blueberry ◽  
Number Of Stems ◽  
Propagation Methods

Goyali, J. C., Igamberdiev, A. U. and Debnath, S. C. 2013. Morphology, phenolic content and antioxidant capacity of lowbush blueberry ( Vaccinium angustifolium Ait.) plants as affected by in vitro and ex vitro propagation methods. Can. J. Plant Sci. 93: 1001–1008. The lowbush blueberry (Vaccinium angustifolium Ait.), a commercially important crop in eastern Canada and the United States of America, is native to North America. It is one of the richest sources of antioxidant compounds and has been reported to be a potential component in reducing the incidence of cancers and cardiovascular diseases. The aim of this study is to evaluate the effect of propagation methods on morphological characters, phenolic content and antioxidant activity. A lowbush blueberry clone, QB 9C, and a cultivar, Fundy, were studied over two growing seasons after being propagated by conventional softwood cutting (SC) and by tissue culture (TC). Significant interactions among genotypes, propagation methods and growing seasons were observed for number of flower buds, total flavonoid (TFC) and proanthocyanidin (PAC) contents and antioxidant capacity. Propagation method interacted significantly with genotypes for the number of stems per plant and total phenolic (TPC) and chlorophyll contents, and with growing season for number of flower buds, TFC and PAC. TC plants produced higher number of stems and branches compared with SC plants. TPC, TFC, PAC, chlorophyll content and antioxidant activity were found in higher levels in the leaves of QB 9C compared with those of Fundy plants. The juvenile characteristics of TC plants which are triggered by growth hormones and readily available nutrients of culture media may be responsible for differences in morphological traits and antioxidant activity.

scholarly journals Cutting Propagation Efficiency of Lowbush Blueberry (Vaccinium angustifolium Ait.) Depending on the Conditions of Media and Cutting

HortScience ◽  
2004 ◽  
Vol 39 (4) ◽  
pp. 825D-825
Author(s):  
Jun Gu Lee* ◽  
Jong Nam Lee ◽  
Eung Ho Lee ◽  
Byoung Yil Lee
Keyword(s):  
South Korea ◽  
Fruit Production ◽  
Early Spring ◽  
Peat Moss ◽  
Basal Region ◽  
Vaccinium Angustifolium ◽  
Cutting Propagation ◽  
Lowbush Blueberry ◽  
Slaked Lime ◽  
Target Values

Lowbush blueberry (Vaccinium angustifolium Ait.) have some potential agricultural benefits for soil covering and high nutritive antioxidant fruit production in highland of South Korea. As a preliminary research step to introduce and to rapidly propagate the lowbush blueberry in South Korea, we evaluated the cutting propagation efficiency under several cutting conditions. The pH of peatmoss media were adjusted to five target values of 4.5, 5.0, 5.5, 6.0, and control with air-slaked lime. Peat-moss were mixed with perlite at five levels of volume ratios in separate experimental design. The cuttings were also prepared with the three cutting regions from mother stock shoots and the number of nodes per cutting. The rooting of V. angustifolium cuttings initiated at 50 days after cutting in nursery bed, and at 70 days after cutting, shallow root ball were developed by 0.5 cm diameter. The rooting rate and root ball development were favorable in the pH 4.5 and nonadjusted control (pH 4.15) while the mixed ratio of perlite did not affect on rooting efficiency ranging from 30% to 50% mixed treatment. Terminal and intermediate region from newly developed shoot performed higher cutting efficiency compared to the basal region, and four to six nodes per each cutting showed favorable shoot growth and root ball development compared to the 2-node cutting. Thus the cutting of upper shoot region having four to six nodes in acidic peatmoss nursery containing 30% to 50% perlite might be suitable preliminary screened conditions. The cutting propagation efficiency of the five lowbush blueberry clones were also evaluated depending on the summer and early spring cutting.

THE BIOLOGY OF CANADIAN WEEDS: 16. Comptonia peregrina (L.) Coult.

1976 ◽  
Vol 56 (1) ◽  
pp. 147-156 ◽  
Author(s):  
IVAN V. HALL ◽  
LEWIS E. AALDERS ◽  
C. FRED EVERETT
Keyword(s):  
Nova Scotia ◽  
Pinus Banksiana ◽  
Jack Pine ◽  
Central Portion ◽  
Eastern Canada ◽  
Vaccinium Angustifolium ◽  
Lowbush Blueberry

Comptonia peregrina (L.) Coult., sweet-fern (Myricaceae), is a weed of pastures, Jack-pine (Pinus banksiana Lamb.) stands, and lowbush blueberry (Vaccinium angustifolium Ait. and V. myrtilloides Michx.) fields of Eastern Canada. It is particularly prevalent on light sandy gleysolic and luvisolic soils from Nova Scotia in the east to the Ontario–Manitoba border in the central portion of Canada. The pruning of shoots by cutting or burning merely stimulates growth of dormant buds on the rhizome. Reproduction is also by seeds that are produced on bur-like inflorescences. Fortunately, this species is quite susceptible to several herbicides such as 2,4–D, dicamba and picloram.

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

2017 ◽  
Vol 7 (4) ◽  
pp. 281-289 ◽  
Author(s):  
David F. Bridges ◽  
Anna Breard ◽  
Alison Lacombe ◽  
Don C. Valentine ◽  
Shravani Tadepalli ◽  
...  
Keyword(s):  
Virus Replication ◽  
Vaccinium Angustifolium ◽  
Lowbush Blueberry ◽  
Tulane Virus

scholarly journals Methodological review to develop a list of bias items used to assess reviews incorporating network meta-analysis: protocol and rationale

BMJ Open ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. e045987
Author(s):  
Carole Lunny ◽  
Andrea C Tricco ◽  
Areti-Angeliki Veroniki ◽  
Sofia Dias ◽  
Brian Hutton ◽  
...  
Keyword(s):  
Systematic Reviews ◽  
Methodological Quality ◽  
Meta Analysis ◽  
Healthcare Providers ◽  
Cochrane Library ◽  
Methodological Review ◽  
Multiple Treatment ◽  
Full Study ◽  
Multiple Treatments ◽  
Treatment Comparisons

IntroductionSystematic reviews with network meta-analysis (NMA; ie, multiple treatment comparisons, indirect comparisons) have gained popularity and grown in number due to their ability to provide comparative effectiveness of multiple treatments for the same condition. The methodological review aims to develop a list of items relating to biases in reviews with NMA. Such a list will inform a new tool to assess the risk of bias in NMAs, and potentially other reporting or quality checklists for NMAs which are being updated.Methods and analysisWe will include articles that present items related to bias, reporting or methodological quality, articles assessing the methodological quality of reviews with NMA, or papers presenting methods for NMAs. We will search Ovid MEDLINE, the Cochrane library and difficult to locate/unpublished literature. Once all items have been extracted, we will combine conceptually similar items, classifying them as referring to bias or to other aspects of quality (eg, reporting). When relevant, reporting items will be reworded into items related to bias in NMA review conclusions, and then reworded as signalling questions.Ethics and disseminationNo ethics approval was required. We plan to publish the full study open access in a peer-reviewed journal, and disseminate the findings via social media (Twitter, Facebook and author affiliated websites). Patients, healthcare providers and policy-makers need the highest quality evidence to make decisions about which treatments should be used in healthcare practice. Being able to critically appraise the findings of systematic reviews that include NMA is central to informed decision-making in patient care.

Jack pine cone quality and cache sizes of red squirrels in southern New Brunswick, Canada

1997 ◽  
Vol 75 (2) ◽  
pp. 332-335 ◽  
Author(s):  
Michael A. Setterington ◽  
Daniel M. Keppie
Keyword(s):  
New Brunswick ◽  
Pinus Banksiana ◽  
Seed Mass ◽  
Dry Mass ◽  
Jack Pine ◽  
Tamiasciurus Hudsonicus ◽  
Red Squirrels ◽  
Length Width ◽  
Total Seed ◽  
Number Of Seeds

Relationships between external cone characteristics (length, width, wet and dry mass), cone quality (total seed mass as a proportion of cone mass, total number of seeds per cone, total seed mass per cone), and number of cones in caches were evaluated for caches of jack pine (Pinus banksiana) cones belonging to red squirrels (Tamiasciurus hudsonicus) in two plantations in southern New Brunswick. Cone length and mass were good predictors of the total number of seeds per cone and total seed mass per cone. Length accounted for a small proportion of the variance of total seed mass as a proportion of cone mass. There was no relationship between the number of seeds or total seed mass per cone and the number of cones per cache.

INORGANIC NITROGEN LEVELS AND NITRIFICATION POTENTIAL IN LOWBUSH BLUEBERRY SOILS

1988 ◽  
Vol 68 (1) ◽  
pp. 63-75 ◽  
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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