scholarly journals Abiotic and biotic factors affecting Rhagoletis mendax [Diptera :Tephritidae] populations in eastern Canadian lowbush blueberry fields

2005 ◽  
Vol 73 (2) ◽  
pp. 73-78 ◽  
Author(s):  
P.S. Geddes ◽  
J.-P.R. LeBlanc ◽  
W.N. Yule
Keyword(s):  
New Brunswick ◽  
Emerging Adults ◽  
Soil Acidity ◽  
Cultural Practice ◽  
Biotic Factors ◽  
Vaccinium Angustifolium ◽  
Factors Affecting ◽  
Lowbush Blueberry ◽  
Rhagoletis Mendax ◽  
Abiotic And Biotic Factors

An investigation was carried out in Nova Scotia and New Brunswick, Canada, to identify natural regulatory factors, such as soil acidity and weed incidence, that could influence the occurrence of blueberry maggot (Rhagoletis mendax) populations in commercial lowbush blueberry fields (Vaccinium angustifolium). Over the range observed, the soil acidity had no detectable influence on the distribution and mortality of R. mendax larvae and pupae. Adult migrational patterns were affected by the cultural practice of burning on alternate years causing the emerging adults of burned fields to move toward sareasin production. There was also a positive correlation between the growth intensity of indigenous weeds and blueberry maggot infestation levels.

Abiotic and biotic factors affecting crop seed germination and seedling emergence: a conceptual framework

2018 ◽  
Vol 432 (1-2) ◽  
pp. 1-28 ◽  
Author(s):  
Jay Ram Lamichhane ◽  
Philippe Debaeke ◽  
Christian Steinberg ◽  
Ming Pei You ◽  
Martin J. Barbetti ◽  
...  
Keyword(s):  
Seed Germination ◽  
Conceptual Framework ◽  
Seedling Emergence ◽  
Biotic Factors ◽  
Factors Affecting ◽  
Abiotic And Biotic Factors ◽  
Crop Seed

THE FIDELITY OF COMMERCIALLY REARED COLONIES OF BOMBUS IMPATIENS CRESSON (HYMENOPTERA: APIDAE) TO LOWBUSH BLUEBERRY IN SOUTHERN NEW BRUNSWICK

1996 ◽  
Vol 128 (5) ◽  
pp. 957-958 ◽  
Author(s):  
Troy L. Whidden
Keyword(s):  
Apis Mellifera ◽  
New Brunswick ◽  
Honey Bee ◽  
Bombus Impatiens ◽  
Crop Pollination ◽  
Vaccinium Angustifolium ◽  
Lowbush Blueberry ◽  
Native Bee

Lowbush blueberry (Vaccinium angustifolium Ait., V. myrtilloides Michx.) growers often use colonies of the European honey bee (Apis mellifera L.) to supplement native bee populations for pollination. Native bee fauna is thought to be insufficient in number and too unpredictable, in terms of numbers, from year to year to be relied on for adequate crop pollination (Kevan and LaBerge 1978; Mackenzie and Winston 1984; Mohr and Kevan 1987; Kevan 1988; Eck 1988).

Abiotic and Biotic Factors Affecting the Ingestion Rates of Mixotrophic Nanoflagellates (Haptophyta)

2018 ◽  
Vol 77 (3) ◽  
pp. 607-615 ◽  
Author(s):  
Ya-Fan Chan ◽  
Kuo-Ping Chiang ◽  
Yun Ku ◽  
Gwo-Ching Gong
Keyword(s):  
Biotic Factors ◽  
Ingestion Rates ◽  
Factors Affecting ◽  
Abiotic And Biotic Factors

scholarly journals Abiotic and Biotic Factors Affecting Resting Spore Formation in the Mite PathogenNeozygites floridana

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Vanessa da Silveira Duarte ◽  
Karin Westrum ◽  
Ana Elizabete Lopes Ribeiro ◽  
Manoel Guedes Corrêa Gondim Junior ◽  
Ingeborg Klingen ◽  
...  
Keyword(s):  
Pathogenic Fungus ◽  
Field Studies ◽  
Spore Formation ◽  
Biotic Factors ◽  
Tetranychus Evansi ◽  
Tropical Regions ◽  
Factors Affecting ◽  
Resting Spore ◽  
Resting Spores ◽  
Abiotic And Biotic Factors

Neozygites floridanais an obligate mite pathogenic fungus in the Entomophthoromycota. It has been suggested that resting spores of this fungus are produced as a strategy to survive adverse conditions. In the present study, possible mechanisms involved in the regulation of resting spore formation were investigated in the hostsTetranychus urticaeandTetranychus evansi. Abiotic and biotic factors mimicking conditions that we, based on earlier field studies, thought might induce resting spores in temperate and tropical regions were tested with isolates from Norway and Brazil. A total of 42 combinations of conditions were tested, but only one induced the formation of a high number of resting spores in only one isolate. The Brazilian isolate ESALQ1420 produced a large number of resting spores (51.5%) inT. urticaeat a temperature of 11°C, photoperiod of 10L:14D, and light intensity of 42–46 (μmol m−2 s−1) on nonsenescent plants (nondiapausing females). Resting spores of the BrazilianN. floridanaisolate ESALQ1421 were found at very low levels (up to 1.0%). Small percentages ofT. urticaewith resting spores (0–5.0%) were found for the Norwegian isolate NCRI271/04 under the conditions tested. The percentages of resting spores found for the Norwegian isolate in our laboratory studies are similar to the prevalence reported in earlier field studies.

THE BIOLOGY OF CANADIAN WEEDS. 2. SPIRAEA LATIFOLIA

1974 ◽  
Vol 54 (1) ◽  
pp. 141-147 ◽  
Author(s):  
I. V. HALL ◽  
R. A. MURRAY ◽  
L. P. JACKSON
Keyword(s):  
Soil Moisture ◽  
Moisture Content ◽  
New Brunswick ◽  
Prince Edward Island ◽  
Soil Moisture Content ◽  
Mechanical Damage ◽  
Growing Season ◽  
Eastern Canada ◽  
Vaccinium Angustifolium ◽  
Lowbush Blueberry

Spiraea latifolia (Ait.) Borkh., broad-leaved meadowsweet (Rosaceae), is a weed of pastures, lowbush blueberry (Vaccinium angustifolium Ait. and V. myrtilloides Mich.) fields and cranberry (V. macrocarpon Ait.) bogs of Eastern Canada, especially where soil moisture content is high during the growing season. Where S. latifolia occurs, other vegetation is lacking or depressed. Much time is lost in harvesting lowbush blueberries due to jamming of the S. latifolia stems among the tines of the rake or in cranberries due to mechanical damage to the harvesters. In Canada, S. latifolia occurs in Newfoundland, Prince Edward Island, Nova Scotia, New Brunswick, Quebec, Ontario, and Manitoba.

scholarly journals Assembly of Optimum Habitats for Asian Houbara Bustard (Chlamydotis macqueenii) in the Arabian Peninsula: The Vegetation Aspects

2015 ◽  
Vol 2015 ◽  
pp. 1-6
Author(s):  
Naseraldeen Baqer Asadalla ◽  
Mohammad Sulaiman Abido ◽  
Asma Abahussain ◽  
Mohamed Shobrak
Keyword(s):  
Arabian Peninsula ◽  
Species Abundance ◽  
Acacia Tortilis ◽  
Biotic Factors ◽  
Factors Affecting ◽  
Houbara Bustard ◽  
Abiotic And Biotic Factors ◽  
Study Sites ◽  
And Behavior ◽  
Line Intercept

This research was conducted in four sites at Mahazat as-Sayd reserve in Saudi Arabia to determine the optimum habitats’ constituents for Asian houbara bustard Chlamydotis macqueenii via assessing abiotic and biotic factors with special reference to vegetation aspects. Vegetative parameters were quantified using combinations of distance and line intercept methods. Acquired data were analyzed using cluster analysis and analysis of variance tests. Results indicated that three of the four plant communities of the study sites were dominated by Acacia tortilis with underground cover composed of lesser species. On the other hand, White Jabal was dominated by scrubs composed mainly of Fagonia indica with sparse Acacia trees. Rumrumiyya site recorded the highest species abundance and vegetative coverage (133%) among the sites. It is concluded that Black Jabal and White Jabal sites are used as nesting and foraging habitats for houbaras, whereas Jabal Khurse is specifically a males’ display site. Nevertheless, Rumrumiyya site was used for foraging and shelter. The study confirmed that density and vegetation cover are of prime importance for houbara site selection. However, other factors affecting feeding and behavior of the species must be considered in further studies.

Sign in / Sign up

Export Citation Format

Share Document