populations known

Listing 1 - 10 from 282 for populations known

Friends of the Arboretum
... this beautiful plant. As of 1990, there were less than 60 known sites in the U.S. Presently the only populations of the eastern prairie fringed orchid are found scattered throughout Illinois ... , an abandoned iron mine in Dodge County, protects one of the three largest hibernating bat populations known to remain in North America. The majority of these bats are little brown bats (Myotis ...
uwarboretum.org

CPC Plant Profile - National Collection of Endangered Plants
... known only from two localities in the Santa Catalina Mountains in southern Arizona. In Sonora, it is known to occur in seven to nine localities. Number Left There are less than 5 populations known in the known ...
www.centerforplantconservation.org

Plant Pathology: Infection Process: Plant Defenses: Genetics of Resistance
... species of the fungal genera Alternaria and Cochliobolus. A few of the approximately twenty known host-selective toxins are proteins or peptides that are directly encoded by race-specific ... Blackwell Scientific Publications, Oxford. pp 168-183. Gabriel, D. W. (1989) Genetics of plant parasite populations and host-parasite specificity. In Kosuge, T. and Nester, E. W. (Eds) Plant-Microbe ...
bugs.bio.usyd.edu.au

Ariocarpus fissuratus
... this case a north - south cline and a west - east cline. The plants in northern populations (known as A. kotschoubeyanus. var. macdowellii) are smaller than the type, with small beak-like tubercles ... Commonly called "living rocks," they are widely distributed as a large number of small, isolated populations, generally on limestone derived gypsum silt plains and on hills, at elevations of around 1000 ...
cactus-art.biz

Plant Pathology: Disease Management: Cultural Management Practices
... on vegetative propagating material or on equipment. Many agricultural systems are characterised by dense populations with genetic homogeneity (monocultures). Once a disease becomes established in such a plant community, ... intensive. Trap and decoy crops Trap crops of susceptible plants are grown on land known to contain pathogens. They become infected and are then destroyed before the pathogens' life ...
bugs.bio.usyd.edu.au

Ariocarpus fissuratus
... to succumb to disease and a weak root system. At this stage, as is well known, they die suddenly. So, after they reach 20 cm in diameter grow them slowly, and ... covered by rock fragments, but the taproot remains alive. Many exist as only small, isolated populations and are in danger of extinction because they sought by plant collectors. For this reason ...
cactus-art.biz

June 2003 Newsletter
... mentioned usually need some help.  One very important thing rosarians can do to reduce thrips populations is to remove spent blooms from the plant promptly and to destroy them along with ... appearance and have an interesting elongated, slender bud.  The flowers are exceptionally fragrant.  ‘Félicité Parmentier’ known since 1834.  This Alba is one of the shorter, and therefore more useful shrubs that ...
carolinadistrict.org

Raccoons
... known to carry a wide variety of diseases. Most of these are harmless to them and to people, but a few, such as distemper, can kill raccoons when their populations ... greatly in their ability to survive. It also causes local populations to become denser than the habitat can adequately support. At ... of travel or in an open place where it is known to be feeding. Bait the trap either with something that ...
edis.ifas.ufl.edu

Squirrels of Florida
... still occur statewide, several races have declined drastically. The race known as Sherman's fox squirrel, which occurs in peninsular ... Lake Okeechobee, known as the Big Cypress fox squirrel, is even rarer and is listed as threatened. Panhandle populations of fox squirrels ... s problem. Other Control Methods The gray squirrel and some populations of fox squirrel are classified as game animals by the ...
edis.ifas.ufl.edu More from this site

CPC Plant Profile - National Collection of Endangered Plants
... , USFWS 1993). Distribution Populations are found in extreme southern Arizona Phillips and Brian 1982, USFWS 1993). Number Left 4 populations; known from 2 extant populations; 1 natural population ... self-sustaining populations of at least 200 reproducing individuals each (2) protect populations from human threats (3) develop guidelines and techniques for supplementing natural populations and (4) ...
www.centerforplantconservation.org

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