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Roundheaded Pine Beetle
''Dendroctonus adjunctus'', the roundheaded pine beetle, is a species of bark beetle in the family Curculionidae found in North America. A parasite, the roundheaded pine beetle feeds on and eventually kills pine trees of several species in Guatemala, Mexico, and the Southern United States (New Mexico, Arizona, Nevada, Colorado, Utah). Roundheaded pine beetles are a serious threat to wild and commercial pine stocks, wiping out up to half of pine trees in a region in outbreak years. To prevent and mitigate the beetle's epidemic outbreaks, loggers have developed a variety of biological, cultural, and chemical controls. Description Like many insect species, the roundheaded pine beetle goes through several stages in its life cycle, changing dramatically in appearance between each one. Adults are 5-6 mm long and 3 mm wide, with females slightly larger than males. Adult exoskeletons are shiny, reflective, dark brown or black, and covered with hairs. Their eyes are flat, don't protrude f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specific name or the specific epithet (in botanical nomenclature, also sometimes i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chihuahua Pine
''Pinus leiophylla'', commonly known as Chihuahua pine, smooth-leaf pine,''Pinus leiophylla'' was originally described and published in ''Linnaea'' 6:354. 1831. and yellow pine (in Mexico, tlacocote and ocote chino), is a tree with a range primarily in Mexico, with a small extension into the United States in southeast Arizona and southwest New Mexico. The Mexican range extends along the Sierra Madre Occidental and Sierra Madre del Sur from Chihuahua to Oaxaca, from 29° North Lat. to 17°, between 1600 and 3000 meters altitude. It requires about a rainfall 600 to 1000 mm a year, mostly in summer. It tolerates frosts in winter. Description This member of family Pinaceae grows to the height of with a trunk diameter of . The needles are in bundles of three to five, long, or rarely to , and are a bright glossy green to yellowish-green. The cones are ovoid, long, or rarely to , and borne on a long stalk; they are unusual in taking about 30–32 months to mature, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scolytinae
A bark beetle is the common name for the subfamily of beetles Scolytinae. Previously, this was considered a distinct family (Scolytidae), but is now understood to be a specialized clade of the "true weevil" family (Curculionidae). Although the term "bark beetle" refers to the fact that many species feed in the inner bark (phloem) layer of trees, the subfamily also has many species with other lifestyles, including some that bore into wood, feed in fruit and seeds, or tunnel into herbaceous plants. Well-known species are members of the type genus ''Scolytus'', namely the European elm bark beetle ''S. multistriatus'' and the large elm bark beetle ''S. scolytus'', which like the American elm bark beetle ''Hylurgopinus rufipes'', transmit Dutch elm disease fungi (''Ophiostoma''). The mountain pine beetle ''Dendroctonus ponderosae'', southern pine beetle ''Dendroctonus frontalis'', and their near relatives are major pests of conifer forests in North America. A similarly aggressive spec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ophiostoma
''Ophiostoma'' is a genus of fungi within the family Ophiostomataceae. It was circumscribed in 1919 by mycologists Hans Sydow and Paul Sydow. Species *''Ophiostoma adjuncti'' *'' Ophiostoma ainoae'' *'' Ophiostoma allantosporum'' *'' Ophiostoma angusticollis'' *'' Ophiostoma araucariae'' *'' Ophiostoma bacillisporum'' *'' Ophiostoma bicolor'' *''Ophiostoma bragantinum'' *'' Ophiostoma brevicolle'' *''Ophiostoma brunneociliatum'' *''Ophiostoma brunneum'' *'' Ophiostoma cantabriense'' *''Ophiostoma canum'' *''Ophiostoma carpenteri''Hausner, G., et al. 2003Three new species of ''Ophiostoma'' and notes on ''Cornuvesica falcate''.''Canadian Journal of Botany'' 81(1) 40–48. *''Ophiostoma clavatum'' *''Ophiostoma colliferum'' *''Ophiostoma coronatum'' *''Ophiostoma cuculatum'' *''Ophiostoma distortum'' *''Ophiostoma epigloeum'' *''Ophiostoma flexuosum'' *''Ophiostoma grande'' *''Ophiostoma himal-ulmi'' *''Ophiostoma longicollum'' *''Ophiostoma manitobense'' *'' Ophiostoma megalobrun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pinus Pseudostrobus
''Pinus pseudostrobus'', known in English as the smooth-bark Mexican pine and in Spanish as ''chamite'' or ''pacingo'', is a tree found in forests of Mexico and Central America. It is 8 to 25 m tall with a dense and round top.It is threatened by logging and wood harvesting. The bark is brown and fissured and smooth when young. It is subject to ex-situ conservation. It grows at altitudes between 850 and 3250 m. from 26° to 15° north latitude, from Sinaloa, Mexico to Nicaragua and Honduras. It occurs within a rainfall regime that rains mostly in summer. A stand of about 15 fully mature smooth-bark Mexican pines is in Imperial County, California, at the Palo Verde County Park, in a narrow strip of land between Hwy 78 and the Colorado River. English botanist John Lindley described the species in 1839. It is divided into ''Pinus pseudostrobus'' var.''apulcensis'' (Lindl.)Shaw (Apulco pine), ''Pinus pseudostrobus'' f.''protuberans'' Martínez and ''Pinus pseudostrobus'' var.' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Montezuma Pine
''Pinus montezumae'', known as the Montezuma pine, is a species of conifer in the family Pinaceae. It is native to Mexico and Central America, where it is known as ocote. The tree grows about 35 m high and 80 cm in diameter; occasionally it may reach a height of 40 m and diameter of 1 m. It has a round crown. The bark is dark brown-grayish. It is the only pine species (in the variety ''rudis'') which has seven needles in each fascicle. It is found from the Mexican states of Nuevo León (25° N. Lat.) and Jalisco (22° n.l.) to the north and to Nicaragua (15° N. Lat.) to the south. It occurs on both mountain ranges of the Sierra Madre Oriental and Sierra Madre Occidental. It grows at altitudes from 2000–3200 m above sea level. It is found in areas between 800–1000 mm rainfall per year. In most of the tree's habitat, rain falls mostly in summer, but in the state of Veracruz, precipitations are spread year round and the climate is ve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
