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Fall Webworm
The fall webworm (''Hyphantria cunea'') is a moth in the family Erebidae known principally for its larval stage, which creates the characteristic webbed nests on the tree limbs of a wide variety of hardwoods in the late summer and fall. It is considered a Pest (animal), pest but does not harm otherwise healthy trees. It is well known to commercial tree services and Arboriculture, arboriculturists. Fall webworms are an invasive species in East Asia. Description The adult fall webworm has a wingspan of approximately 30 mm and is generally white-colored, although some individuals may have dark-colored marks. Distribution The moth is native to North America, ranging from Canada to Mexico and has been introduced species, introduced into other continents. Introduced to what was formerly Yugoslavia in the 1940s (firstly recorded in 1949), it now has occupied probably its entire range in Europe from France to the Caspian Sea in the east as well as penetrated into Central Asia: Tu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dru Drury
Dru Drury (4 February 1725 – 15 January 1804) was a British collector of natural history specimens and an entomologist. He received specimens collected from across the world through a network of ship's officers and collectors including Henry Smeathman. His collections were utilized by many entomologists of his time to describe and name new species and he is best known for his book ''Illustrations of natural history'' which includes the names and descriptions of many insects, published in parts from 1770 to 1782 with most of the copperplate engravings done by Moses Harris. Life Dru Drury was born in Wood Street, London. His father, also Dru Drury, was a citizen, goldsmith and silversmith of the City of London. Drury's great-grandfather, William, Lord of the Manor of Colne, Cambridgeshire, Colne, was Sheriff of Cambridgeshire and Huntingdonshire#1600–1699, Sheriff of Cambridgeshire in 1676. The Drury family traced back to a Thomas Drury, of Fincham, Norfolk, who died in 154 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
40th Parallel North
Following are circles of latitude between the 35th parallel north and the 40th parallel north: 36th parallel north The 36th parallel north is a circle of latitude that is 36 degrees north of the Earth's equatorial plane. It crosses Africa, the Mediterranean Sea, Asia, the Pacific Ocean, North America and the Atlantic Ocean. In the ancient Mediterranean world, its role for navigation and geography was similar to that played by the Equator today. From 7 April 1991 to 31 December 1996, the parallel defined the limit of the northern no-fly zone in Iraq. At this latitude the sun is visible for 14 hours, 36 minutes during the summer solstice and 9 hours, 43 minutes during the winter solstice. United States In the United States, the 36th parallel north is occasionally used as a rough northern boundary for the Sun Belt, a region spanning most Southern and Southwestern states and comprising most of the nation's warmest climates. Cities and landmarks close to the parallel inc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salix Sepulcralis Group
The ''Salix'' Sepulcralis Group is a cultivar group containing all cultivars of hybrids between ''Salix alba'' and ''Salix babylonica''. The trees in this group are sometimes referred to as white weeping willow or glaucous weeping willow in reference to the mixed appearance from the parent species. It was first described by L. Simonkai in 1890 from trees growing in Romania. The group contains both weeping and nonweeping cultivars, though the best-known of its cultivars is 'Chrysocoma', the most widely grown weeping tree Weeping trees are trees characterized by soft, limp twigs. This characterization may lead to a bent crown and pendulous branches that can cascade to the ground. While weepyness occurs in nature, most weeping trees are cultivars. Because of their ..... Some of the cultivars are hybrids of ''S. babylonica'' var. ''matsudana'' 'Tortuosa' and have inherited from its parent the twisted and contorted branches, as well as being more cold-tolerant, as ''S. babylonica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ulmus Americana
''Ulmus americana'', generally known as the American elm or, less commonly, as the white elm or water elm, is a species of elm native to eastern North America. The trees can live for several hundred years. It is a very Hardiness (plants), hardy species that can withstand low winter temperatures, but it is affected by Dutch elm disease. The wood was seldom utilized until the advent of mechanical sawing. It is the state tree of Massachusetts and North Dakota. Description The American elm is a deciduous tree which, under ideal conditions, can grow to heights of . The trunk may have a diameter at breast height (dbh) of more than , supporting a high, spreading umbrella-like canopy. The leaves are alternate, long, with double-serrate margins and an oblique base. The leaves turn yellow in the fall. The perfect flowers are small, purple-brown and, being wind-pollinated, apetalous. The flowers are also protogynous, the female parts maturing before the male, thus reducing, but not elimi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Juglans Nigra
''Juglans nigra'', the eastern American black walnut, is a species of deciduous tree in the walnut family, Juglandaceae, native to central and eastern North America, growing mostly in riparian zones. Black walnut is susceptible to thousand cankers disease, which provoked a decline of walnut trees in some regions. Black walnut is allelopathic, releasing chemicals from its roots and other tissues that may harm other organisms and give the tree a competitive advantage, but there is no scientific consensus that this is a primary competitive factor. Black walnut is an important tree commercially, as the wood is a deep brown color and easily worked. Walnut seeds (nut (fruit), nuts) are cultivated for their distinctive and desirable taste. Walnut trees are grown for lumber and food, and processors have found additional markets for even the tough outer hulls by finely grinding them for use in products such as abrasive cleansers. Many cultivars have been developed for improved quality w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pecan
The pecan ( , , ; ''Carya illinoinensis'') is a species of hickory native to the Southern United States and northern Mexico in the region of the Mississippi River. The tree is cultivated for its seed primarily in the U.S. states of Georgia (U.S. state), Georgia, New Mexico, and Texas, and in Mexico. The seed is an edible nut used as a snack and in various recipes, such as Praline (nut confection), praline candy and pecan pie. The pecan is the state nut of Alabama, Arkansas, California, Texas, and Louisiana, and is also the state tree of Texas. Name derives from an Algonquian languages, Algonquian word variously referring to pecans, walnuts, and hickory nuts. There are many pronunciations, some regional and others not.See "wikt:pecan#Pronunciation, Pecan" at wikt:Main Page, Wiktionary. There is little agreement in the United States regarding the "correct" pronunciation, even regionally. In 1927, the National Pecan Growers Association acknowledged variant pronunciations whil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deciduous
In the fields of horticulture and botany, the term deciduous () means "falling off at maturity" and "tending to fall off", in reference to trees and shrubs that seasonally shed Leaf, leaves, usually in the autumn; to the shedding of petals, after flowering; and to the shedding of ripe fruit. The antonym of deciduous in the botanical sense is evergreen. Generally, the term "deciduous" means "the dropping of a part that is no longer needed or useful" and the "falling away after its purpose is finished". In plants, it is the result of natural processes. "Deciduous" has a similar meaning when referring to animal parts, such as deciduous antlers in deer, deciduous teeth (baby teeth) in some mammals (including humans); or decidua, the uterine lining that sheds off after birth. Botany In botany and horticulture, deciduous plants, including trees, shrubs and herbaceous perennials, are those that lose all of their Leaf, leaves for part of the year. This process is called abscission. I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hyphantria Cunea Female
''Hyphantria'' is a genus of tiger moths in the family Erebidae. The genus was erected by Thaddeus William Harris in 1841. The moths are primarily found in North and Central America. One species, ''Hyphantria cunea'', was introduced in Eurasia. Species * ''Hyphantria cunea'' (Drury, 1773) * ''Hyphantria orizaba'' (Druce, 1897) * ''Hyphantria panoezys'' (Dyar, 1916) * ''Hyphantria penthetria'' Dyar, 1912 * ''Hyphantria pictipupa ''Hyphantria pictipupa'' is a moth of the family Erebidae. It was described by Asa Fitch in 1857. It is found in Brazil Brazil, officially the Federative Republic of Brazil, is the largest country in South America. It is the world's List of ...'' Fitch, 1857 References * Spilosomina Moth genera Taxa named by Thaddeus William Harris {{Spilosomina-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Instar
An instar (, from the Latin '' īnstar'' 'form, likeness') is a developmental stage of arthropods, such as insects, which occurs between each moult (''ecdysis'') until sexual maturity is reached. Arthropods must shed the exoskeleton in order to grow or assume a new form. Differences between instars can often be seen in altered body proportions, colors, patterns, changes in the number of body segments or head width. After shedding their exoskeleton (moulting), the juvenile arthropods continue in their life cycle until they either pupate or moult again. The instar period of growth is fixed; however, in some insects, like the salvinia stem-borer moth, the number of instars depends on early larval nutrition. Some arthropods can continue to moult after sexual maturity, but the stages between these subsequent moults are generally not called instars. For most insect species, an ''instar'' is the developmental stage of the larval forms of holometabolous (complete metamorphism) or ny ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
