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Title
In forests, more than 20 non-indigenous species of plant pathogens attack woody plants (Liebold et al. 1995). Two of the most serious plant pathogens are the chestnut blight fungus (Cryphonectria parasitica) and Dutch elm disease (Ophiostoma ulmi). Before the accidental introduction of chestnut blight, approximately 25% of ...
www.news.cornell.edu

VALUES OF BIODIVERSITY
But then in 1845-1847, the wind-borne Potato blight fungus spread throughout the country and caused almost complete failure of the potato crop. It is ... occurring soil bacterium Bacillus thuringiensis, and a naturally occurring virus (marketed as Gypchek). A lethal fungus is also being tested. A new strain of Bacillus thuringiensis might be able to kill more ...
darwin.bio.uci.edu

EXOTIC INTRODUCTIONS
Detrimental Effects of Exotic Species 1. Direct Effects. The chestnut blight fungus was introduced into this country in the late 1800's along with some Chinese chestnut ... by groundskeepers at the Bronx Zoo in 1904. The Chinese species, which had evolved with the fungus, was hardly affected by it, but almost the entire U.S. population of chestnut trees was ...
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issg Database: Ecology of Cryphonectria parasitica
More Occurs in: host, natural forests, planted forests Habitat description C. parasitica is a fungus that attacks primarily Castanea dentata and Castanea sativa although it can attack a variety of ... Europe and North America (EPPO, 2004). Invasion pathways to new locations Nursery trade: The Chestnut blight fungus was likely introduced to North America on nursery stock from Asia and was first ...
issg.appfa.auckland.ac.nz

Habitat Restoration Native Plants
In the summer of 2003, with twice the normal rainfall, the blight fungus appeared at the base of two of the larger chestnut trees on the preserve. The cankered bark appeared orange and was striated, torn and bulging. The fungus (Chryphonectria parasitica) has entered the cambium layer just under the bark and is suffocating the trees. In ...
nativeamerica.org

Appalachian Mountains chapter for Conservation International book on Wilderness
Appalachian wilderness is not economic development, urbanization, or the footprint of outdoor recreation - invasive species, are wreaking havoc in the region. Around 1900, horticulturalists unwittingly introduced a blight fungus that eventually killed an estimated 3 billion chestnut trees, reducing a species that was once the largest tree in eastern North America and a dominant component of the ...
www.discoverlife.org

U.S. Global Change Research Information Office
Plant pathogens can equally overwhelm an entire ecosystem. The chestnut blight fungus arrived in New York City in the late 19th century on nursery stock from ... that replaced many of the chestnuts were red oaks, which are particularly susceptible to the blight. Introduced species can drastically affect specific plants or animals even when the invaders do not ...
www.gcrio.org

Preventing Late Blight in Potaotes
C). The Lifecycle of the Late Blight Fungus 1. Sporangia, coming from cull piles, volunteer potato plants or infected seed, are carried ... rot. When to Start Spraying Fungicidal sprays have to be applied before the risk of blight becomes significant. In northeastern North America spraying usually begins in late July. In Europe, the ...
www.eap.mcgill.ca

UC IPM: UC Management Guidelines for Early Blight on Tomato
Manage Pests UC Pest Management Guidelines | More pests | More crops | About guidelines | Tomato Early Blight Pathogen: Alternaria solani (Reviewed 1/08, updated 1/08) In this Guideline: Symptoms Comments on ... occur if conditions remain cool and humid for several days after a rain. The early blight fungus survives in the soil on residue of infected tomatoes, potatoes, and nightshade weeds. The ...
www.ipm.ucdavis.edu

UC IPM: UC Management Guidelines for Late Blight on Tomato
MANAGEMENT Tomato varieties resistant to certain races of the late blight fungus are grown where the disease occurs regularly. Remove any nearby volunteer tomato and potato plants and nightshades. Check transplants to ensure they are free of late blight before planting. Fungicides are generally needed only if the disease appears during a time of year ...
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