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Leo London
We strive to achieve real value for money for our customers, lenders and communities. How we are making the most of every pound we spend is explained in our annual Aster Group Value for Money Self Assessment reports.
An additional global product is now available: the ASTER Water Body Dataset (ASTWBD). This raster product identifies all water bodies as either ocean, river, or lake. Each GDEM tile has a corresponding Water Body tile.The GDEM and ASTWBD are available for download from NASA Earthdata and Japan Space Systems.This ASTER product is available at no charge for any user pursuant to an agreement between METI and NASA. For more information about the GDEM, see the Validation Report: ASTER GDEM V2 Validation Summary Report.
During the growing season of 2012, 35 garlic plant samples were submitted to the University of Minnesota Plant Disease Clinic for disease diagnosis. Samples originated from multiple counties throughout Minnesota as well as Iowa, Wisconsin, and South Dakota. Symptoms first appeared at the time plants were starting to produce scapes. Symptoms included leaf discoloration that varied from yellow to purple, plant stunting, and leaf tip necrosis. In severe cases, the plants wilted and died. Bulbs of affected plants ranged from being soft and small to almost normal-looking. Symptoms were similar to those associated with phytoplasma infection in other plants. Total genomic DNA was extracted from 30 symptomatic samples and five asymptomatic leaf samples using a Qiagen DNeasy Plant Mini Kit (Qiagen, Germantown, MD) according to the manufacturer's instructions, and used with the universal phytoplasma primers P1/P7 in a direct PCR assay, and with P1/AYint in a nested PCR assay (2) to yield amplicons of 1.8 and 1.6 kb, respectively. Asymptomatic plants did not produce amplicons. Garlic cultivars displaying a range of symptoms tested positive for the presence of phytoplasma. These cultivars included: Susanville, Middle Eastern, Music, Ajo Rojo, Spanish Roja, Inchelium Red, Silver White, Asian Tempest, Chesnok Red, and Purple Glazer. The P1/P7 PCR products of 1,830 bp were purified using the PureLink PCR Purification kit (Life Technologies, Carlsbad, CA), and cloned in a pGem T-Easy vector system (Promega, Madison, WI). Sequences from a clone from each of Wisconsin, Iowa, and Minnesota were deposited in GenBank under the accession numbers KC000005, KC000006, and KC000007, respectively. A BLASTn similarity search revealed that the Wisconsin and Iowa isolates shared 99% homology to the sequences of 16SrI-A group phytoplasmas, aster yellows phytoplasma (AY389827), and aconitum proliferation phytoplasma (AF510323). The Minnesota isolate had 99% sequence homology to a 16SrI-B group phytoplasma, mulberry yellow dwarf phytoplasma (GQ249410). Also, the iPhyClassifier 16Sr group/subgroup classification based on similarity (3) analyses showed that the Wisconsin and Iowa phytoplasma isolates had 16S rDNA sequences in the 16SrI-A group with similarity coefficients of 0.97 and 1.00, respectively, to aster yellows witches'-broom phytoplasma AYWB (NC_007716). The same analysis revealed that the Minnesota phytoplasma isolate 16S rDNA sequence grouped with the 16SrI-B group onion yellows phytoplasma (NC_005303) with a similarity coefficient of 1.0. A phylogenic tree was deduced by the neighbor joining algorithm, clustering together the Iowa, Minnesota, and Wisconsin isolate sequences with a 16SrI group phytoplasma. Aster yellows phytoplasma has been reported in North America, but only in Canada (1). This is the first documented occurrence of 16SrI aster yellows group phytoplasma in garlic in the United States. The spring of 2012 was unusually warm, and high leafhopper pressure was observed throughout the Midwest; above average numbers of many ornamental crops and small grains were infected with phytoplasma. These events may have contributed to the phytoplasma infection in garlic. References: (1) A. H. Khadhair et al. Microbiol. Res. 157:161, 2002. (2) C. D. Smart et al. Appl. Env. Microbiol. 62:2988, 1996. (3) Y. Zhao et al. Int. J. Syst. Evol. Microbiol. 59:2582, 2009.
Symphyotrichum novi-belgii (L.) G.L. Nesom (syn. Aster novi-belgii L.), known as New York aster, is a perennial herb used in gardens and as a potted plant. The plant is native to North America but has been developed into various horticultural varieties. In Korea, it is one of the most common plants used for autumn bloom. In September 2011, New York asters (variety unknown) showing typical signs of powdery mildew were observed in a public garden in Seoul, Korea. Since then, the disease on New York asters has been continuously found in parks and flower markets in different regions of Korea. Voucher specimens (n=3) were deposited in the Korea University Herbarium (KUS-F 30752, 31865, and 32103). On leaves, circular to irregular white patches appeared which subsequently showed abundant hyphal growth on both sides of the leaves and on young stems and inflorescences, reducing the aesthetic value and vigor of the plants affected. Hyphae were septate, branched, and 4 to 8 µm wide. Appressoria on the mycelium were nipple-shaped. Conidiophores measured 110 to 200 9 to 11.5 μm, were simple, and produced 2 to 5 immature conidia in chains with a sinuate outline, followed by 2 to 3 cells. Foot-cells of conidiophores were straight, cylindric, and 55 to 125 μm long. Conidia were hyaline, ellipsoid to barrel-shaped, measured 22 to 52 15 to 20 μm (length/width ratio = 1.5-2.5), lacked distinct fibrosin bodies, and produced germ tubes on the subterminal position, with reticulate wrinkling of the outer walls. No chasmothecia were observed. The structures described above were typical of the Oidium subgenus Euoidium anamorph of the genus Golovinomyces, and the fungus measurements were consistent with those of G. ambrosiae (Schwein.) U. Braun & R.T.A. Cook (Braun and Cook 2012, Qiu et al. 2020). To confirm the identity of the causal fungus, the internal transcribed spacer (ITS) and large subunit (LSU) regions of rDNA were amplified with primers PM10/ITS4 for ITS and PM3/TW14 for LSU (Mori et al. 2000, Bradshaw and Tobin 2020). The resulting sequences were deposited in GenBank (Accession No. OP028065-7 for ITS and OP028053-5 for LSU). A GenBank BLAST search of these sequences revealed 100% identity with sequences of G. ambrosiae on many asteraceous plants, including S. novi-belgii from China (MK452575-9 for ITS and MK452648-52 for LSU). Pathogenicity was confirmed through inoculation by gently pressing diseased leaves onto leaves of five healthy potted New York aster plants. Five non-inoculated plants served as controls. Plants were maintained in an incubator at 24C. Inoculated plants developed signs and symptoms after three weeks, whereas the control plants remained symptomless. The fungus present on the inoculated plants was morphologically identical to that observed initially on diseased plants, fulfilling Koch's postulates. The powdery mildew infections of S. novi-belgii associated with G. ambrosiae have been widely known in Europe and North America but only recently in China (Qiu et al. 2020, Farr and Rossman 2022). In Japan, Podosphaera fuliginea was known to be associated with powdery mildew of S. novi-belgii (Farr and Rossman 2022). To our knowledge, this is the first report of powdery mildew caused by G. ambrosiae on S. novi-belgii in Korea. The powdery mildew on this ornamental plant can be considered a severe threat.
This sticky post deals with bug reports. Here are the steps to follow when submitting a bug report or when asked to provide further details about a crash or error.
These steps require a compiled-from-source Aster install in order to have a debug executable, Salome-Meca does not provide a debug version.
Fall-blooming asters with daisy-like flowers include yellow ones such as goldenasters (Chrysopsis spp.), tickseeds (Coreopsis spp.), beggarticks (Bidens spp.), silkgrasses (Pityopsis spp.) and sunflowers (Helianthus spp.), as well as the traditional purple to white asters (Symphyotrichum spp.). Many asters, however, lack petals but still are very attractive, such as a traditional harbinger of fall: the goldenrods (Solidago spp.).
This report shows how PhotoSat uses 14-band multispectral ASTER satellite imagery to produce alteration mineral maps through spectral matching. Using deep learning technology, the process detects 12 minerals, including silica, kaolinite, sericite, jarosite, and iron oxide gossans at the Cerro Casale deposit.
Hannah Jones is a Georgia State University graduate, with a major in journalism and minor in public policy. She began studying journalism in high school and has since served as a reporter and editor for...More by Hannah E. Jones
The farm is planning on making more than a few adjustments in response to the discoveries in their first report. Jacobson has already signed up for a carbon offsetting program, made plans to expand solar energy on the farm, and will begin experimenting with biodegradable zip ties.
The highest numbers of plants and animals that are unique to Canada are found in British Columbia, Quebec, Alberta and Yukon. The report also identifies 27 key concentrations of endemic species that occur in every province and territory, including within the Avalon Peninsula (NL), north shore of Prince Edward Island, St. Lawrence River Freshwater Estuary, Waterton, Vancouver Island and the Mackenzie Delta. Most of these species need more conservation efforts.
The results of this report will be used by governments, Nature Conservancy of Canada and other groups, individuals and landowners to prioritize conservation actions and to inspire public support for species and habitat protection in Canada.
The new Madaster Pioneers in Norway, Aspelin Ramm and Smedvig, are known as circular frontrunners. They will use Madaster to make better choices for circular construction based on insight and report on circularity and carbon footprint.
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