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Apple Maggot
The apple maggot (''Rhagoletis pomonella''), also known as the railroad worm (but distinct from the '' Phrixothrix'' beetle larva, also called railroad worm), is a species of fruit fly, and a pest of several types of fruits, mostly apples. This species evolved about 150 years ago through a sympatric shift from the native host hawthorn to the domesticated apple species ''Malus domestica'' in the northeastern United States. This fly is believed to have been accidentally spread to the western United States from the endemic eastern United States region through contaminated apples at multiple points throughout the 20th century. The apple maggot uses Batesian mimicry as a method of defense, with coloration resembling that of the forelegs and pedipalps of a jumping spider (family Salticidae). The adult form of this insect is about long, slightly smaller than a housefly. The larva, which is the stage of this insect's lifecycle that causes the actual damage to the fruit, is similar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Railroad Worm
A railroad worm is a larva or larviform female adult of a beetle of the genus ''Phrixothrix'' in the family Phengodidae, characterized by the possession of two different colors of bioluminescence. It has the appearance of a caterpillar Caterpillars ( ) are the larval stage of members of the order Lepidoptera (the insect order comprising butterflies and moths). As with most common names, the application of the word is arbitrary, since the larvae of sawflies (suborder .... The eleven pairs of luminescent organs on their second thoracic segment through their ninth abdominal segment can glow yellowish-green, while the pair on their head can glow red; this is due to different luciferases in their bodies, as the reaction substrate, called luciferin, is the same. The "railroad worm" name arises because these glowing spots along the body resemble the windows of train cars internally illuminated in the night. The light emissions are believed to be a warning signal to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Benjamin Dann Walsh
Benjamin Dann Walsh (September 21, 1808 – November 18, 1869) was an English-born American entomologist who served as the first official state entomologist in Illinois.Mallis (1971) He was a leading influence during a time of significant transition in American entomology. Walsh championed the application of scientific methods to control agricultural pests. He was a proponent of biological control as an effective means to manage insects. He was also one of the first American scientists to support Charles Darwin's theory of evolution and was instrumental in securing its broad acceptance in the entomological community. Biography Walsh was born in Hackney Central, Hackney, which was then a small village outside of London. The son of Benjamin Walsh (British politician), Benjamin Walsh and Mary Bidwell Clarke, he was the fifth of thirteen children.Sheppard (2004) When Walsh was a boy, his father, a member of parliament, was charged with embezzlement and caught attempting to flee t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Egg (biology)
An egg is an organic vessel grown by an animal to carry a possibly fertilization, fertilized egg cell (a zygote) and to egg incubation, incubate from it an embryo within the egg until the embryo has become an animal fetus that can survive on its own, at which point the animal hatches. Most arthropods, vertebrates (excluding live-bearing mammals), and Mollusca, mollusks lay eggs, although some, such as scorpions, do not. Reptile eggs, bird eggs, and monotreme eggs are laid out of water and are surrounded by a protective eggshell, shell, either flexible or inflexible. Eggs laid on land or in nests are usually kept within a warm and favorable temperature range while the embryo grows. When the embryo is adequately developed it hatches, i.e., breaks out of the egg's shell. Some embryos have a temporary egg tooth they use to crack, pip, or break the eggshell or covering. The largest recorded egg is from a whale shark and was in size. Whale shark eggs typically hatch within the m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Proboscis
A proboscis () is an elongated appendage from the head of an animal, either a vertebrate or an invertebrate. In invertebrates, the term usually refers to tubular arthropod mouthparts, mouthparts used for feeding and sucking. In vertebrates, a proboscis is an elongated nose or snout. Etymology First attested in English in 1609 from Latin , the latinisation (literature), latinisation of the Ancient Greek (), which comes from () 'forth, forward, before' + (), 'to feed, to nourish'. The plural as derived from the Greek is , but in English the plural form ''proboscises'' occurs frequently. Invertebrates The most common usage is to refer to the tubular feeding and sucking organ of certain invertebrates such as insects (e.g., Insect mouthparts#Proboscis, moths, butterflies, and mosquitoes), worms (including Acanthocephala, Nemertea, proboscis worms) and gastropod molluscs. Acanthocephala The Acanthocephala, the thorny-headed worms or spiny-headed worms, are characterized by the pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malus
''Malus'' ( or ) is a genus of about 32–57 species of small deciduous trees or shrubs in the family Rosaceae, including the domesticated orchard apple, crab apples (sometimes known in North America as crabapples) and wild apples. The genus is native plant, native to the temperate zone of the Northern Hemisphere. Description Apple trees are typically tall at maturity, with a dense, twiggy crown. The Leaf , leaves are long, alternate, simple, with a serrated margin. The flowers are borne in corymbs, and have five petals, which may be white, pink, or red, and are Plant reproductive morphology, perfect, with usually red stamens that produce copious pollen, and a Ovary (botany)#Half-inferior_ovary, half-inferior ovary; flowering occurs in the spring after 50–80 growing degree-days, varying greatly according to subspecies and cultivar. Many apples require Pollination#Mechanism, cross-pollination between individuals by insects (typically bees, which freely visit the flowers for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sierra Madre Oriental
The Sierra Madre Oriental () is a mountain range in northeastern Mexico. The Sierra Madre Oriental is part of the American Cordillera, a chain of mountain ranges (cordillera) that consists of an almost continuous sequence of mountain ranges that form the western "backbone" of North America, Central America, South America, and Antarctica. Setting Spanning the Sierra Madre Oriental runs from the Rio Grande on the border between Coahuila and Texas south through Nuevo León, southwest Tamaulipas, San Luis Potosí, Querétaro, and Hidalgo to northern Puebla, where it joins with the east-west running Eje Volcánico Transversal of central Mexico. The northernmost are the Sierra del Burro and the Sierra del Carmen which reach the border with the United States at the Rio Grande. North of the Rio Grande, the range continues northwestward into Texas and beyond as the Davis and Guadalupe Ranges. Mexico's Gulf Coastal Plain lies to the east of the range, between the mountains and the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crataegus Douglasii
''Crataegus douglasii'' is a North American species of hawthorn known by the common names black hawthorn and Douglas' thornapple. It is most abundant in the Pacific Northwest. Description ''Crataegus douglasii'' is a compact erect bushy shrub growing to tall with a trunk of up to thick. It is covered in fan-shaped green leaves about long with teeth along the distal margin. Thorns along the branches are 1–2.5 cm long. White flowers with greenish centers grow in bunches at the ends of each thin branch. The fruit is a blackish pome up to about 1 cm across, containing 3–5 rocklike seeds. Taxonomy The species is named after David Douglas, who collected seed from the plant during his botanical explorations. Formerly placed within the species, ''Crataegus douglasii'' var. ''duchesnensis'' is now considered to be a synonym of '' Crataegus saligna''. Distribution and habitat The thorny shrub is native to northern and western North America, where it grows in varied h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portland, Oregon
Portland ( ) is the List of cities in Oregon, most populous city in the U.S. state of Oregon, located in the Pacific Northwest region. Situated close to northwest Oregon at the confluence of the Willamette River, Willamette and Columbia River, Columbia rivers, it is the county seat of Multnomah County, Oregon, Multnomah County, Oregon's most populous county. Portland's population was 652,503, making it the List of United States cities by population, 28th most populous city in the United States, the sixth most populous on the West Coast of the United States, West Coast, and the third most populous in the Pacific Northwest after Seattle and Vancouver. Approximately 2.5 million people live in the Portland metropolitan area, Oregon, Portland metropolitan area, making it the List of metropolitan statistical areas, 26th most populous in the United States. Almost half of Oregon's population resides within the Portland metro area. Named after Portland, Maine, which is itself named aft ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vancouver, Washington
Vancouver ( ) is a city on the north bank of the Columbia River in the U.S. state of Washington (state), Washington, located in Clark County, Washington, Clark County. Founded in 1825 and incorporated in 1857, Vancouver had a population of 190,915 as of the 2020 United States census, 2020 census, making it the List of municipalities in Washington, fourth-most populous city in Washington State. Vancouver is the county seat of Clark County, Washington, Clark County and forms part of the Portland metropolitan area, Portland-Vancouver metropolitan area, the 25th-largest metropolitan area in the United States. Originally established in 1825 around Fort Vancouver, a fur trading, fur-trading outpost, the city is located on the Washington–Oregon border along the Columbia River, directly north of Portland, Oregon, Portland. Etymology Vancouver shares its name with the larger city of Vancouver in southern British Columbia, Canada, approximately to the north. Both cities were named afte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhagoletis Zephyria
''Rhagoletis zephyria'' is a species of tephritid or fruit fly in the genus '' Rhagoletis'' of the family Tephritidae. Visually similar to ''Rhagoletis pomonella The apple maggot (''Rhagoletis pomonella''), also known as the railroad worm (but distinct from the '' Phrixothrix'' beetle larva, also called railroad worm), is a species of fruit fly, and a pest of several types of fruits, mostly apples. Thi ...'' and often misidentified as such. References zephyria Insects described in 1894 {{Rhagoletis-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
