scholarly journals Pathogenicity of Aphelenchoides pseudogoodeyi on the ornamental plants Asplenium nidus and Lilium speciosum in Brazil

2021 ◽  
Vol 58 (1) ◽  
pp. 74-84
Author(s):  
E. C. Santos ◽  
I. L. Da Silva ◽  
R. O. Rosa ◽  
C. M. G. Oliveira ◽  
D. S. Buonicontro
Keyword(s):  
Total Population ◽  
Ornamental Plants ◽  
Opportunistic Pathogen ◽  
The United States ◽  
Histopathological Study ◽  
Foliar Tissue ◽  
Lilium Speciosum ◽  
Asplenium Nidus ◽  
Oriental Lily ◽  
Bird’S Nest Fern

SummaryAphelenchoides pseudogoodeyi has recently been reported in association with seeds of forage grasses and rice in Brazil and senescent strawberry plants, in the United States. This nematode is likely a mycophagous species; however, so far, its pathogenicity potential to plants is unclear. This study aimed to verify the pathogenicity of A. pseudogoodeyi to two species of ornamental plants. The experiments were conducted by inoculating A. pseudogoodeyi onto Bird’s-Nest Fern (Asplenium nidus) and Oriental Lily (Lilium speciosum) leaves, using two inoculation methods (with and without injury). After 40 days of inoculation (DAI) in Bird’s-Nest Fern and 5, 10, 20 and 40 DAI in Oriental Lily, the pathogenicity and the host efficiency were evaluated by symptoms observation and by severity, final nematode population and reproductive factor (RF), respectively. Additionally, a histopathological study was performed by inoculating A. pseudogoodeyi onto Bird’s-Nest Fern for observing anatomical alterations. A. pseudogoodeyi was able to cause local necrotic lesions on both Bird’s-Nest Fern and Oriental Lily leaves. However, the presence of injury was essential to enable A. pseudogoodeyi to penetrate and cause those symptoms in both plant species. Also, the total population of A. pseudogoodeyi decreased drastically over time and RF was <1, which characterized these species as poor-host or resistant plants. A. pseudogoodeyi penetrated into the foliar tissue and induced a total destruction of the mesophyll and collapse of the cells, with the formation of large intercellular spaces. It is concluded that A. pseudogoodeyi is an opportunistic pathogen as injury was required to induce symptoms in Bird’s-Nest Fern and Oriental Lily.

State IQ and Elderly Suicide Rates in the United States

2008 ◽  
Vol 102 (2) ◽  
pp. 601-602 ◽  
Author(s):  
Martin Voracek
Keyword(s):  
United States ◽  
Total Population ◽  
The United States ◽  
Elderly Persons ◽  
Suicide Rates ◽  
The Usa ◽  
Elderly Suicide

Paralleling previous findings with state suicide rates of the total population, the associations of state suicide rates of elderly persons with regional IQ estimates across the USA were inconsistent (positive, negative, or nil), depending on the source of available state IQ estimates used in the analysis. The implications of these findings and directions for further inquiry are discussed.

scholarly journals First Report of Sclerotinia sclerotiorum on Campanula carpatica and Schizanthus × wisetonensis in Italy

Plant Disease ◽  
2002 ◽  
Vol 86 (1) ◽  
pp. 71-71
Author(s):  
A. Garibaldi ◽  
A. Minuto ◽  
M. L. Gullino
Keyword(s):  
United States ◽  
Sclerotinia Sclerotiorum ◽  
Ornamental Plants ◽  
Soil Surface ◽  
The United States ◽  
First Report ◽  
Potted Plants ◽  
Initial Symptoms ◽  
Stem Necrosis ◽  
Campanula Carpatica

The production of potted ornamental plants is very important in the Albenga Region of northern Italy, where plants are grown for export to central and northern Europe. During fall 2000 and spring 2001, sudden wilt of tussock bellflower (Campanula carpatica Jacq.) and butterfly flower (Schizanthus × wisetonensis Hort.) was observed on potted plants in a commercial greenhouse. Initial symptoms included stem necrosis at the soil line and yellowing and tan discoloration of the lower leaves. As stem necrosis progressed, infected plants growing in a peat, bark compost, and clay mixture (70-20-10) wilted and died. Necrotic tissues were covered with whitish mycelia that produced dark, spherical (2 to 6 mm diameter) sclerotia. Sclerotinia sclerotiorum was consistently recovered from symptomatic stem pieces of both plants disinfested for 1 min in 1% NaOCl and plated on potato dextrose agar amended with streptomycin sulphate at 100 ppm. Pathogenicity of three isolates obtained from each crop was confirmed by inoculating 45- to 60-day-old C. carpatica and Schizanthus × wisetonensis plants grown in containers (14 cm diameter). Inoculum that consisted of wheat kernels infested with mycelia and sclerotia of each isolate was placed on the soil surface around the base of previously artificially wounded or nonwounded plants. Noninoculated plants served as controls. All plants were maintained outdoors where temperatures ranged between 8 and 15°C. Inoculated plants developed symptoms of leaf yellowing, followed by wilt, within 7 to 10 days, while control plants remained symptomless. White mycelia and sclerotia developed on infected tissues and S. sclerotiorum was reisolated from inoculated plants. To our knowledge, this is the first report of stem blight of C. carpatica and Schizanthus × wisetonensis caused by S. sclerotiorum in Italy. The disease was previously observed on C. carpatica in Great Britain (2) and on Schizanthus sp. in the United States (1). References: (1) D. F. Farr et al. Fungi on Plants and Plant Products in the United States. The American Phytopathological Society, St. Paul, MN, 1989. (2) J. Rees. Welsh J. Agric. 1:188, 1925.

scholarly journals Intellectual property rights in Brazilian floriculture: innovations for the growth and development of the market

2017 ◽  
Vol 23 (3) ◽  
pp. 296 ◽  
Author(s):  
Antonio Helio Junqueira ◽  
Marcia Peetz
Keyword(s):  
Growth And Development ◽  
Ornamental Plants ◽  
Genetic Material ◽  
The United States ◽  
Consumer Market ◽  
International Trends ◽  
Recent Developments ◽  
Cultivated Species ◽  
The Impact ◽  
Sectoral Policy

One of the most important demands imposed by the consumer market on the Brazilian Productive Chain of Flowers and Ornamental Plants is the constant launching of innovations in cultivated species and varieties. Such innovations include the constant introduction of flowers and plants not yet grown and commercialized, both native and adapted exotic species, as well as transformations and changes in size, shape, coloring and conduction patterns and presentation of these goods to the market. Brazil does not have a relevant breeding and cultivation industry. In this sense, it is highly dependent on imports of genetic material developed by countries such as the Netherlands, Germany, Japan, the United States of America, Thailand, among others. Recent developments in the sectoral policy to protect the rights of genetic developers, in the development of internationally adequate legislation and in the control of the use and trade of cultivars, has allowed Brazil greater access to new genetic materials of high quality and in line with contemporary international trends in the consumption. This article aims to discuss the state of the art of protection of cultivars in Brazil, pointing to the advances that the legislation and the inspection have allowed in relation to the introduction of genetic innovations, evaluating the impact of these measures on the growth and development of the market of consumption of flowers and ornamental plants in the country.

scholarly journals First Report of Powdery Mildew, Caused by Erysiphe cichoracearum, on Coneflowers

Plant Disease ◽  
1999 ◽  
Vol 83 (7) ◽  
pp. 694-694 ◽  
Author(s):  
P. L. Sholberg ◽  
J. H. Ginns ◽  
T. S. C. Li
Keyword(s):  
Powdery Mildew ◽  
Ornamental Plants ◽  
Echinacea Purpurea ◽  
The United States ◽  
Plant Diseases ◽  
Conidial Suspension ◽  
Decay Fungi ◽  
Erysiphe Cichoracearum ◽  
Epidermal Surface ◽  
Medicinal Properties

Purple coneflowers (Echinacea purpurea) are grown in North America and Europe for their medicinal properties and as ornamental plants. In September 1997 and again in 1998, a previously undescribed disease was noticed on fully grown coneflower plants in Summerland and Oliver, British Columbia. Mycelia were observed on stems, foliage, and flowers, and distinct dark red to black, round (approximately 5 mm in diameter) lesions were observed on the flower petals. The disease appeared similar to powdery mildews that have been reported on numerous genera of the Asteraceae. Samples of the diseased tissue were examined and the salient features of the fungus on two specimens were determined: cleistothecia infrequent, subglobose or flattened on the side next to the leaf surface, 121 to 209 μm in diameter; epidermal (surface) cells 20 μm in diameter; appendages hyphoid, 5 μm in diameter, up to 200 μm long; asci, 10 to 19 in each cleistothecium, broadly ellipsoid, 47 to 85 × 28 to 37 μm with a short stalk, about 8 to 13 μm long and 8 μm in diameter; ascospores, immature, two per ascus, ellipsoid to broadly ellipsoid, 17 to 25 × 11 to 13 μm, thin walled, hyaline, and smooth; conidia oblong with sides slightly convex and apices truncate, 27 to 40 × 14 to 20 μm, walls hyaline, thin, smooth. Based on the occurrence of asci that contained two ascospores and the hyphoid appendages on the cleistothecia we concluded that the fungus was Erysiphe cichoracearum DC. Damage due to this disease was minimal in 1997 and 1998 because it developed very late in the growing season and occurred sporadically within the plantings. In order to complete Koch's postulates, Echinacea purpurea plants grown in the greenhouse were inoculated with a conidial suspension (105 to 106 conidia per ml) from field-infected plants. Powdery mildew first appeared 3 months later, eventually infecting leaves and stems of 12 of 49 inoculated plants. It was distinctly white and in discrete patches on leaves, compared with coalescing dark brown areas on the stems. Microscopic examination of the conidia confirmed that they were E. cichoracearum. Although powdery mildew caused by E. cichoracearum has been widely reported on lettuce, safflower, and other cultivated and wild Compositae, we found no reference to it on Echinacea spp. in Canada (1,2), the U.S. (3), or elsewhere in the world (4). The specimens have been deposited in the National Mycological Herbarium of Canada (DAOM) with accession numbers 225933 and 225934 for Oliver and Summerland, B.C., respectively. References: (1) U. Braun. Beih. Nova Hedwigia 89:1, 1987. (2) I. L. Conners. 1967. An annotated index of plant diseases in Canada and fungi recorded on plants in Alaska, Canada, and Greenland. Canada Dept. of Agric. Pub. 1251. (3) D. F. Farr et al. 1989. Fungi on Plants and Plant Products in the United States. American Phytopathological Society, St. Paul, MN. (4) J. Ginns. 1986. Compendium of plant disease and decay fungi in Canada, 1960-1980. Agriculture Canada Pub. 1813.

scholarly journals Specifics of COVID-19 in Siberia

2021 ◽  
Vol 5 (1) ◽  
pp. 38-41
Author(s):  
Dmitrii Tikhonov
Keyword(s):  
United States ◽  
Total Population ◽  
Geographical Area ◽  
The United States ◽  
Development Patterns ◽  
Harsh Climate

The geographical area of Siberia is about 13,100,000 sq. km, which is more than the territories of the United States, China, Canada, Brazil, Australia, and India, but its total population as of January 1, 2021 is only 31,140,697 people [1]. Due to its harsh climate, many diseases, including infectious ones, have their own specific development patterns in this territory.

Introduction

2019 ◽  
pp. 1-16
Author(s):  
Damien Van Puyvelde
Keyword(s):  
United States ◽  
Federal Government ◽  
Total Population ◽  
District Of Columbia ◽  
The United States ◽  
Government Institutions ◽  
Security Clearance ◽  
Mission Management

Today, close to a million contractors hold a security clearance in the United States. This is a quarter of all cleared personnel, and more than the total population of the District of Columbia, where most major federal government institutions are located. Tens of thousands of contractors contribute to core intelligence functions like collection and operations, analysis and production, and even mission management....

Abstract P266: The Association Of Recent Age-specific Growth Of The > 65 Years Population With Heart Disease Mortality In The United States, 2005-2017

Circulation ◽  
2020 ◽  
Vol 141 (Suppl_1) ◽  
Author(s):  
Stephen Sidney ◽  
Sadiya S Khan ◽  
Yariv Gerber ◽  
Donald M Lloyd-jones ◽  
Alan S Go ◽  
...  
Keyword(s):  
Heart Disease ◽  
Mortality Rate ◽  
Population Growth ◽  
Total Population ◽  
Age Groups ◽  
The United States ◽  
Population Increase ◽  
Age Group ◽  
Specific Population ◽  
Time Periods

Introduction: In 2011, the number of deaths with an underlying cause of heart disease (HD) reached its lowest level in 56 years. However, there has subsequently been a steady increase in the annual number of total HD deaths, owing to a rapid increase (23%) in the size of the population ≥65 years of age in the U.S. To understand these trends, we sought to characterize differences between 2005-2011 and 2011-2017 in population and mortality by age subgroups among those ≥65 years. Methods: We determined age-specific population size, HD mortality rate, and absolute number of HD deaths in the ≥65 age group for the time periods 2005-2011 and 2011-2017, as well as for the <65 years age group, using the CDC WONDER online data set. Results: Age-specific population growth was greatest among those 65-74 years between 2005-2011 and 2011-2017, representing 76% of the total population growth among those ≥65 years old in both time periods (Table) and 51% of the growth for the entire population from 2011-2017. From 2005-2011, decreases in the mortality rate of 20% or greater in each of the age subgroups (65-74, 75-84, 85+) resulted in a decline in the number of total HD deaths in each of the age groups in spite of substantial population increases in the 65-74 and 85+ age groups. However, subsequent changes in the age-specific mortality rate among those ≥65 years were lower than population increases from 2011-2017, resulting in an increased number of total HD deaths in all > 65 years age subgroups. This was most notable among those age 65-74 years in whom the 32% population increase with a 1.5% decline in the mortality rate resulted in a 30% increase in the number of HD deaths, representing 61.3% of the increase in number of HD deaths in the 65+ years age group and 53% of the increase of HD deaths in all age groups from 2011-2017. Conclusions: The rapid growth of the 65-74 years age group (baby boomers) accounts for most of the population growth in the ≥65 years age group and more than half the increase in both total population growth and the total number of HD deaths from 2011-2017.

scholarly journals Do Income, Race and Ethnicity, and Sprawl Influence the Greenspace-Human Health Link in City-Level Analyses? Findings from 496 Cities in the United States

2018 ◽  
Vol 15 (7) ◽  
pp. 1541 ◽  
Author(s):  
Matthew Browning ◽  
Alessandro Rigolon
Keyword(s):  
Mental Health ◽  
Human Health ◽  
Race And Ethnicity ◽  
Vegetation Index ◽  
Total Population ◽  
The United States ◽  
Tree Cover ◽  
Spatial Average ◽  
Four Dimensions ◽  
The City

Examination of the greenspace—human health relationship operates in at least four dimensions: what is considered greenspace? which moderators and mediators are included? what outcomes are measured? and which units of analysis (e.g., individuals, cities) are studied? We examined three of these four dimensions in a cross-sectional study of 496 of the 500 most populated US cities (total population size = 97,574,613, average population per city = 197,920). Spatial average models tested the effect of two greenspace measures (Normalized Difference Vegetation Index greenness and tree cover) on two outcomes (obesity and mental health), while adjusting for income, race and ethnicity, sprawl, age, sex, physical inactivity, median age of housing, and total population. We conducted analyses at the city scale, which is an understudied unit of analysis, and compared findings to individual- and neighborhood-level studies. In two of four models, greenspace was associated with better health. We found race and ethnicity moderated this relationship with varying results. In full sample analyses, cities with greater percentages of non-Hispanic Whites showed links between higher tree cover and lower obesity but marginal relationships between higher greenness and lower obesity. In subsample analyses with majority-non-Hispanic Black cities, higher tree cover was associated with lower obesity and better mental health. These findings advance previous research by showing that race and ethnicity moderate the greenspace—health link at the city level.

Validation of MRI-Based Contact Modeling for Analysis of In Vivo Radiocarpal Mechanics

2007 ◽  
Author(s):  
Alexander J. Waller ◽  
Terence E. McIff ◽  
Mehmet Bilgen ◽  
E. Bruce Toby ◽  
Kenneth J. Fischer
Keyword(s):  
United States ◽  
Total Population ◽  
The United States ◽  
Contact Modeling ◽  
Effective Treatments

Arthritis is a pervasive problem and over 15% of the total population of the United States has been doctor-diagnosed with arthritis. Even more Americans have symptoms. Clearly, understanding the pathogenesis of arthritis, developing effective treatments and/or finding ways to prevent it are all important goals.

Baseline Toxicity of the Insecticides Bifenthrin and Thiamethoxam on Halyomorpha halys (Hemiptera: Pentatomidae) Collected From the Eastern United States

2020 ◽  
Vol 113 (2) ◽  
pp. 1043-1046
Author(s):  
Adam Alford ◽  
Thomas P Kuhar ◽  
George C Hamilton ◽  
Peter Jentsch ◽  
Grzgorz Krawczyk ◽  
...  
Keyword(s):  
United States ◽  
Ornamental Plants ◽  
The United States ◽  
Halyomorpha Halys ◽  
Brown Marmorated Stink Bug ◽  
Stink Bug ◽  
Eastern United States ◽  
Agronomic Crops ◽  
Baseline Levels ◽  
Topical Applications

Abstract Brown marmorated stink bug, Halyomorpha halys (Stål), is an invasive species in the United States that attacks a wide variety of agricultural commodities including fruits, vegetables, agronomic crops, and ornamental plants. Populations of H. halys adults were collected from four and six states in 2017 and 2018, respectively, and tested using topical applications to establish baseline levels of susceptibility to two commonly used insecticides, bifenthrin and thiamethoxam. A Probit-estimated (95% fiducial limits) LD50 and LD99 of 2.64 g AI/L (1.2–3.84 g AI/L) and 84.96 g AI/L (35.76–716.16 g AI/L) for bifenthrin, and a LD50 and LD99 of 0.05 g AI/liter (1.14E-5–0.27 g AI/L) and 150.11 g AI/L (27.35–761,867 g AI/L) for thiamethoxam, respectively. These baseline levels can be used for future insecticide resistance monitoring in H. halys.

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