scholarly journals A fungal spore calendar for the atmosphere of Szczecin, Poland

2016 ◽  
Vol 69 (3) ◽  
Author(s):  
Aleksandra Bednarz ◽  
Sylwia Pawłowska
Keyword(s):  
Fungal Spore ◽  
The Other ◽  
Daily Fluctuation ◽  
Spore Calendar ◽  
Late Fall

A calendar of fungal spore seasons for Szczecin during 2013 was established using a 7-day volumetric Lanzoni trap. Thirty-five spore taxa were identified. The dominant spore types detected were <em>Cladosporium</em> (66%), <em>Didymella</em> (29%), <em>Alternaria</em> (1.67%), and <em>Leptosphaeria</em> type (1.21%). The spores were present throughout the study year. However, there was a wide daily fluctuation in the concentration values with a tendency towards an increase during the summer months. Seasonally, the spore levels of <em>Cladosporium</em>, <em>Alternaria</em>, and <em>Leptosphaeria</em> type peaked in summer (June–September), while those of <em>Didymella</em> mainly in July. Most of the other spore types had the highest concentrations in summer but occurred in the air from spring to late fall.

Strawberry Waiting-bed Plants: A Valid Alternative to Increase Early and Total Yields in Subtropical Regions

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 459e-459
Author(s):  
Daniel S. Kirschbaum ◽  
Javier Honorato ◽  
Daniel J. Cantliffe
Keyword(s):  
High Altitude ◽  
High Latitude ◽  
Fruit Production ◽  
The Other ◽  
South American ◽  
Total Production ◽  
Early Winter ◽  
Late Fall ◽  
Low Altitude ◽  
Marketable Fruit

Strawberry (Fragaria xananassa Duch.) production in subtropical areas is characterized by a low late-fall and early winter fruit yield, a time when the value of the crop is the highest of the season. Under this context, the objective of the present study was to evaluate the feasibility of waiting-bed plants for late fall and early winter production in order to increase early and total fruit yields in the Argentine sub-tropic. Plants of the cultivar `Chandler' produced in a waiting-bed (WB), at high-latitude (HL), high-altitude (HA), or low-altitude (LA) were compared at two locations in Tucuman, NW Argentina: Famailla (1995, experiment 1; 1996, experiment 2) and Lules (1995, experiment 3). Total production from WB plants was 41% higher than from HA plants in experiment 1. Total production from WB plants was 83 % and 53 % greater than from HL plants and LA plants, respectively, in experiment 2. Early season fruit production was greater in WB (241%) than HL plants in experiment 2. In experiment 3, early fruit production from WB plants was greater than HL, HA, and LA, by 573, 177, and 158%, respectively. The number of marketable fruit from WB plants was larger than in the other treatments (139-231%). WB percentages of marketable fruit were above 90%. The results suggest that WB plants could be considered as an alternative to HL, HA, and LA plants to improve strawberry production and yield distribution in South American subtropical regions.

Paulownia Tomentosa: Effects of Fertilization and Coppicing in Plantation Establishment

1983 ◽  
Vol 7 (2) ◽  
pp. 81-85 ◽  
Author(s):  
Peter R. Beckjord ◽  
Marla S. McIntosh
Keyword(s):  
Early Spring ◽  
The Other ◽  
Plantation Establishment ◽  
Paulownia Tomentosa ◽  
Late Fall ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
In The Beginning

Abstract Ten fertilizer treatments were applied to 400 field-planted container-grown Paulownia tomentosa (Thunb.) Steud. seedlings arranged in a completely randomized design. Seedlings received either no fertilizer, fritted micronutrients at 768 lb/ac, or granular fertilizer (N:P2O5:K2O) of 20:20:20 or 25:10:10 at 100, 200, 400, or 800 lb/ac. First-season growth was significantly increased with the use of increased rates of granular fertilizers, and specific formulations within rates provided some growth benefit. Second-season growth of new sprouts was less variable than first-season growth. One-half of the seedlings were coppiced in the late fall of the first season and the other half were coppiced in the early spring in the beginning of the second season. Coppicing treatments provided no significant differences in second-season growth. Based on the results of this study, it is recommended that seedlings be fertilized with 25:10:10 at 800 lb/ac at the time of planting during the first season of establishment and then coppiced in the early spring of the second season of establishment.

First fungal spore calendar of the middle-west of the Iberian Peninsula

Aerobiologia ◽  
2016 ◽  
Vol 32 (3) ◽  
pp. 529-539 ◽  
Author(s):  
Estefanía Sánchez Reyes ◽  
David Rodríguez de la Cruz ◽  
José Sánchez Sánchez
Keyword(s):  
Iberian Peninsula ◽  
Fungal Spore ◽  
Spore Calendar ◽  
Middle West

First fungal spore calendar for the atmosphere of Bratislava, Slovakia

Aerobiologia ◽  
2019 ◽  
Vol 35 (2) ◽  
pp. 343-356 ◽  
Author(s):  
Jana Ščevková ◽  
Jozef Kováč
Keyword(s):  
Fungal Spore ◽  
Spore Calendar

scholarly journals The estimation of fungal spore concentrations using two counting methods

2012 ◽  
Vol 62 (2) ◽  
pp. 117-123 ◽  
Author(s):  
Danuta Stępalska ◽  
Jerzy Wołek
Keyword(s):  
Correlation Coefficient ◽  
Fungal Spore ◽  
Concentration Fluctuations ◽  
The Other ◽  
Significance Level ◽  
Paired Sample ◽  
Pearson’S Correlation Coefficient ◽  
Counting Methods ◽  
Sample Test ◽  
Daily Concentration

The aim of the study was to estimate the spore counts of <i>Alternaria</i> and <i>Cladosporium</i> using the single longitudinal traverse and twelve transverse traverses methods. Both the single and twelve traverses methods generally showed similar average daily concentration fluctuations of the two studied spore types on the same days, although the single traverse method usually presented higher spore concentrations. However, analysing the distribution of concentrations obtained using both methods, there were days when the single or twelve traverses method showed a rise or fall in concentration which was not reflected by the other method. In case of <i>Cladosporium</i> higher daily concentrations obtained using the twelve traverses method occurred more frequently in the months of the highest spore concentrations. The higher concentrations of <i>Alternaria</i> spores obtained using this method occurred more frequently in the months of the lowest concentrations. Analysis of correlation (Pearson's correlation coefficient r) between those variables (number of days with higher concentration and monthly concentration) showed that the correlation was significant for <i>Cladosporium</i> and not significant for <i>Alternaria</i>, for both at the significance level &#945;= 0.05. The results of the Wilcoxon's Paired Sample Test indicated that for both taxa the average daily concentrations obtained using the 1 traverse method were significantly higher than those obtained using the 12 traverses method.

Daily variation of sorbitol and related carbohydrates in Malus leaves

1971 ◽  
Vol 49 (1) ◽  
pp. 173-177 ◽  
Author(s):  
Calvin Chong ◽  
C. D. Taper
Keyword(s):  
Daily Variation ◽  
Great Increase ◽  
The Other ◽  
Malus Pumila ◽  
Daily Fluctuation ◽  
Daily Pattern ◽  
Apple Leaves ◽  
Malus Pumila Mill ◽  
Reserve Carbohydrate ◽  
Very High

The daily variation of sorbitol, starch, sucrose, glucose, and fructose were estimated in the leaf of the apple, Malus pumila Mill., at 2-h intervals over 24-h periods in each of the months June to October, inclusive, 1968. Marked daily fluctuation in sorbitol concentration was observed in all months, accompanied by more moderate variations in the other carbohydrates. The patterns of concentration variability in sorbitol and starch were relatively similar compared to the more irregular patterns of the three sugars, sucrose, glucose, and fructose. In conjunction with its invariably very high leaf concentration relative to the other carbohydrates, the general daily pattern of sorbitol content, namely, a marked nocturnal decrease followed by a great increase during daylight, indicated that sorbitol is the major photosynthetically derived carbohydrate and is further evidence that sorbitol is a reserve carbohydrate in apple leaves.

Stromatoporoids from the Famennian (Devonian) Wabamun Formation, Normandville oilfield, north–central Alberta, Canada

1988 ◽  
Vol 62 (03) ◽  
pp. 411-419 ◽  
Author(s):  
Colin W. Stearn
Keyword(s):  
Patch Reef ◽  
Abundant Species ◽  
The Other ◽  
North Central ◽  
Biotic Crisis

Stromatoporoids are the principal framebuilding organisms in the patch reef that is part of the reservoir of the Normandville field. The reef is 10 m thick and 1.5 km2in area and demonstrates that stromatoporoids retained their ability to build reefal edifices into Famennian time despite the biotic crisis at the close of Frasnian time. The fauna is dominated by labechiids but includes three non-labechiid species. The most abundant species isStylostroma sinense(Dong) butLabechia palliseriStearn is also common. Both these species are highly variable and are described in terms of multiple phases that occur in a single skeleton. The other species described areClathrostromacf.C. jukkenseYavorsky,Gerronostromasp. (a columnar species), andStromatoporasp. The fauna belongs in Famennian/Strunian assemblage 2 as defined by Stearn et al. (1988).

D. The Line Spectrum of Pulsating Variable Stars

1967 ◽  
Vol 28 ◽  
pp. 207-244
Author(s):  
R. P. Kraft
Keyword(s):  
Variable Stars ◽  
The Other ◽  
Line Spectrum ◽  
Afternoon Session ◽  
Empirical Information ◽  
Pulsating Variable Stars ◽  
Almost Continuous ◽  
Informal Approach

(Ed. note:Encouraged by the success of the more informal approach in Christy's presentation, we tried an even more extreme experiment in this session, I-D. In essence, Kraft held the floor continuously all morning, and for the hour and a half afternoon session, serving as a combined Summary-Introductory speaker and a marathon-moderator of a running discussion on the line spectrum of cepheids. There was almost continuous interruption of his presentation; and most points raised from the floor were followed through in detail, no matter how digressive to the main presentation. This approach turned out to be much too extreme. It is wearing on the speaker, and the other members of the symposium feel more like an audience and less like participants in a dissective discussion. Because Kraft presented a compendious collection of empirical information, and, based on it, an exceedingly novel series of suggestions on the cepheid problem, these defects were probably aggravated by the first and alleviated by the second. I am much indebted to Kraft for working with me on a preliminary editing, to try to delete the side-excursions and to retain coherence about the main points. As usual, however, all responsibility for defects in final editing is wholly my own.)

C. The Continuous Spectrum of Pulsating Variable Stars

1967 ◽  
Vol 28 ◽  
pp. 177-206
Author(s):  
J. B. Oke ◽  
C. A. Whitney
Keyword(s):  
Continuous Spectrum ◽  
Variable Stars ◽  
Velocity Fields ◽  
The Other ◽  
Line Spectrum ◽  
Direct Information ◽  
Thermodynamic Structure ◽  
Diagnostic Interpretation ◽  
Pulsating Variable Stars ◽  
The Continuum

Pecker:The topic to be considered today is the continuous spectrum of certain stars, whose variability we attribute to a pulsation of some part of their structure. Obviously, this continuous spectrum provides a test of the pulsation theory to the extent that the continuum is completely and accurately observed and that we can analyse it to infer the structure of the star producing it. The continuum is one of the two possible spectral observations; the other is the line spectrum. It is obvious that from studies of the continuum alone, we obtain no direct information on the velocity fields in the star. We obtain information only on the thermodynamic structure of the photospheric layers of these stars–the photospheric layers being defined as those from which the observed continuum directly arises. So the problems arising in a study of the continuum are of two general kinds: completeness of observation, and adequacy of diagnostic interpretation. I will make a few comments on these, then turn the meeting over to Oke and Whitney.

Observing programme for the 24-inch/36-inch Schmidt telescope

1966 ◽  
Vol 24 ◽  
pp. 337
Author(s):  
W. Iwanowska
Keyword(s):  
The Other ◽  
Schmidt Telescope ◽  
Flint Glass

A new 24-inch/36-inch//3 Schmidt telescope, made by C. Zeiss, Jena, has been installed since 30 August 1962, at the N. Copernicus University Observatory in Toruń. It is equipped with two objective prisms, used separately, one of crown the other of flint glass, each of 5° refracting angle, giving dispersions of 560Å/mm and 250Å/ mm respectively.

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