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Foreign Grain Beetle
The foreign grain beetle (''Ahasverus advena'') is a species of beetle in the family Silvanidae. It is related to the sawtoothed grain beetle. Description The foreign grain beetle is approximately 2 mm ( in) in length. It can be distinguished from other grain beetles from its slight projections or knobs on each front corner of the pronotum, and its club-shaped antennae. However, other '' Ahasverus'' species look very similar and particular confusion can occur with '' Ahasverus rectus'', which is also found in grain bins in North America. The larvae are worm-like, cream-colored and often reach a length of 3 mm before pupating into darker adults. Males and females are identical in appearance both as larvae and adults. The adult is usually reddish brown, or sometimes black. Natural history Distribution The foreign grain beetle is found in tropical and temperate regions. It can complete development at temperatures between 20 and 35 °C. Behavior At 30&nb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joseph Waltl
Dr. Joseph Waltl (28 July 1805 – 4 March 1888) was a German physician and naturalist. Waltl was born in Wasserburg am Bodensee and studied at Landshut and Munich, graduating in medicine in 1819. He then travelled in Austria, France and Spain. In 1833 he became a teacher in Passau, and in 1835 a professor of natural history at the university. His numerous writings were mainly concerned with beetles and other insects. Notably, the singular Iberian ribbed newt was named ''Pleurodeles waltl'' in honor of the young Waltl by his colleague Karl Michahelles in 1830. In 1839 he published "''Reise durch Tyrol, Oberitalien und Piemont nach dem südlichen Spanien''" (Journey through Tyrol, northern Italy and the Piedmont to southern Spain). Also, he was the author of several mineralogical Mineralogy is a subject of geology specializing in the scientific study of the chemistry, crystal structure, and physical (including optical) properties of minerals and mineralized artifacts. Specifi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beetle
Beetles are insects that form the order Coleoptera (), in the superorder Endopterygota. Their front pair of wings are hardened into wing-cases, elytra, distinguishing them from most other insects. The Coleoptera, with about 400,000 described species, is the largest of all orders, constituting almost 40% of described insects and 25% of all known animal life-forms; new species are discovered frequently, with estimates suggesting that there are between 0.9 and 2.1 million total species. Found in almost every habitat except the sea and the polar regions, they interact with their ecosystems in several ways: beetles often feed on plants and fungi, break down animal and plant debris, and eat other invertebrates. Some species are serious agricultural pests, such as the Colorado potato beetle, while others such as Coccinellidae (ladybirds or ladybugs) eat aphids, scale insects, thrips, and other plant-sucking insects that damage crops. Beetles typically have a particularly hard e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silvanidae
Silvanidae, "silvan flat bark beetles", is a family of beetles in the superfamily Cucujoidea,Thomas, M. C., and R.A. B. Leschen. 2010. Silvanidae Kirby, 1837. p. 346-350. In: Leschen, R.A.B., R.G. Beutel, and J.F. Lawrence. Coleoptera, Beetles. Vol. 2: Morphology and Systematics (Elateroidea, Bostrichiformia, Cucujiformia partim). Handbook of Zoology. Walter de Gruyter, Berlin. consisting of 68 described genera and about 500 described species. The family is represented on all continents except Antarctica, and is most diverse at both the generic and species levels in the Old World tropics. Description Silvanids generally are small, brownish, flattened, pubescent and densely punctured beetles ranging from 1.2-15mm in length, and mostly with a 5-5-5 tarsal formula. They have short, strongly clubbed, to very elongate antennae, and frequently grooves or carinae on the head and/or pronotum. Many genera have the lateral margins of the pronotum dentate or denticulate. The family is divided ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sawtoothed Grain Beetle
''Oryzaephilus surinamensis'', the sawtoothed grain beetle, is a beetle in the superfamily ''Cucujoidea''. It is a common, worldwide pest of grain and grain products as well as chocolate, drugs, and tobacco. The species's binomial name, meaning "rice-lover from Suriname," was coined by Carl Linnaeus, who received specimens of the beetle from Surinam. It is also known as the malt beetle and may be referenced in the poem This Is The House That Jack Built in the line "....the rat that ate the malt that lay in the house that Jack built" the malt referenced may not be actual malted grain but a sawtoothed grain beetle. Description and Identification ''O. surinamensis'' is a slender, dark brown beetle 2.4–3 mm in size, with characteristic "teeth" running down the side of the prothorax. It is nearly identical to '' Oryzaephilus mercator'', or the Merchant Grain Beetle, however, ''O. surinamensis'' has smaller eyes and a broader, more triangular head; ''O. surinamensis'' unlik ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ahasverus
Ahasuerus ( ; , commonly ''Achashverosh'';; fa, اخشورش, Axšoreš; fa, label=New Persian, خشایار, Xašāyār; grc, Ξέρξης, Xerxes (other), Xérxēs. grc, label=Koine Greek, Ἀσουήρος, Asouḗros, in the Septuagint; la, Assuerus in the Vulgate) is a name applied in the Hebrew Bible to three rulers and to a Babylonian official (or Median king) in the ''Book of Tobit''. Etymology The Hebrew language, Hebrew form is believed to have derived from the Old Persian name of Xerxes I, ''Xšayāršā'' ( 'king of all male; Hero among Kings'). That became Babylonian language, Babylonian ''Aḥšiyaršu'' (, ''aḫ-ši-ia-ar-šu'') and then ''Akšiwaršu'' (, ''ak-ši-i-wa6-ar-šu'') and was borrowed into Hebrew as ''Ăḥašwêrôš'' and thence into Latin as ''Ahasuerus'', the form traditionally used in English Bibles. The Persian name was independently rendered in Ancient Greek as ''Xérxēs''. Many newer English translations and paraphrases of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ahasverus Rectus
''Ahasverus rectus'' is a species of silvanid flat bark beetle in the family Silvanidae Silvanidae, "silvan flat bark beetles", is a family of beetles in the superfamily Cucujoidea,Thomas, M. C., and R.A. B. Leschen. 2010. Silvanidae Kirby, 1837. p. 346-350. In: Leschen, R.A.B., R.G. Beutel, and J.F. Lawrence. Coleoptera, Beetles. Vo .... It is found in North America. References Further reading * * Silvanidae Articles created by Qbugbot Beetles described in 1854 Taxa named by John Lawrence LeConte Beetles of North America {{silvanidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Humidity
Humidity is the concentration of water vapor present in the air. Water vapor, the gaseous state of water, is generally invisible to the human eye. Humidity indicates the likelihood for precipitation, dew, or fog to be present. Humidity depends on the temperature and pressure of the system of interest. The same amount of water vapor results in higher relative humidity in cool air than warm air. A related parameter is the dew point. The amount of water vapor needed to achieve saturation increases as the temperature increases. As the temperature of a parcel of air decreases it will eventually reach the saturation point without adding or losing water mass. The amount of water vapor contained within a parcel of air can vary significantly. For example, a parcel of air near saturation may contain 28 g of water per cubic metre of air at , but only 8 g of water per cubic metre of air at . Three primary measurements of humidity are widely employed: absolute, relative, and specific. Ab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Equilibrium Moisture Content
The equilibrium moisture content (EMC) of a hygroscopic material surrounded at least partially by air is the moisture content at which the material is neither gaining nor losing moisture. The value of the EMC depends on the material and the relative humidity and temperature of the air with which it is in contact. The speed with which it is approached depends on the properties of the material, the surface-area-to-volume ratio of its shape, and the speed with which humidity is carried away or towards the material (e.g. diffusion in stagnant air or convection in moving air). Equilibrium moisture content of grains The moisture content of grains is an essential property in food storage. The moisture content that is safe for long-term storage is 12% for corn, sorghum, rice and wheat and 11% for soybeanSadakam, Samy Grain Drying Tools: Equilibrium Moisture Content Tables and Psychrometric Charts. Univ. Arkansas, FSA1074 At a constant relative humidity of air, the EMC will drop by a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fungus
A fungus ( : fungi or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. These organisms are classified as a kingdom, separately from the other eukaryotic kingdoms, which by one traditional classification include Plantae, Animalia, Protozoa, and Chromista. A characteristic that places fungi in a different kingdom from plants, bacteria, and some protists is chitin in their cell walls. Fungi, like animals, are heterotrophs; they acquire their food by absorbing dissolved molecules, typically by secreting digestive enzymes into their environment. Fungi do not photosynthesize. Growth is their means of mobility, except for spores (a few of which are flagellated), which may travel through the air or water. Fungi are the principal decomposers in ecological systems. These and other differences place fungi in a single group of related organisms, named the ''Eumycota'' (''true f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yeast
Yeasts are eukaryotic, single-celled microorganisms classified as members of the fungus kingdom. The first yeast originated hundreds of millions of years ago, and at least 1,500 species are currently recognized. They are estimated to constitute 1% of all described fungal species. Yeasts are unicellular organisms that evolved from multicellular ancestors, with some species having the ability to develop multicellular characteristics by forming strings of connected budding cells known as pseudohyphae or false hyphae. Yeast sizes vary greatly, depending on species and environment, typically measuring 3–4 µm in diameter, although some yeasts can grow to 40 µm in size. Most yeasts reproduce asexually by mitosis, and many do so by the asymmetric division process known as budding. With their single-celled growth habit, yeasts can be contrasted with molds, which grow hyphae. Fungal species that can take both forms (depending on temperature or other conditions) are ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pupa
A pupa ( la, pupa, "doll"; plural: ''pupae'') is the life stage of some insects undergoing transformation between immature and mature stages. Insects that go through a pupal stage are holometabolous: they go through four distinct stages in their life cycle, the stages thereof being egg, larva, pupa, and imago. The processes of entering and completing the pupal stage are controlled by the insect's hormones, especially juvenile hormone, prothoracicotropic hormone, and ecdysone. The act of becoming a pupa is called pupation, and the act of emerging from the pupal case is called eclosion or emergence. The pupae of different groups of insects have different names such as ''chrysalis'' for the pupae of butterflies and ''tumbler'' for those of the mosquito family. Pupae may further be enclosed in other structures such as cocoons, nests, or shells. Position in life cycle The pupal stage follows the larval stage and precedes adulthood (''imago'') in insects with complete metamorphosi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parasitoid
In evolutionary ecology, a parasitoid is an organism that lives in close association with its host (biology), host at the host's expense, eventually resulting in the death of the host. Parasitoidism is one of six major evolutionarily stable strategy, evolutionary strategies within parasitism, distinguished by the fatal prognosis for the host, which makes the strategy close to predation. Among parasitoids, strategies range from living inside the host (''endoparasitism''), allowing it to continue growing before emerging as an adult, to Paralysis, paralysing the host and living outside it (''ectoparasitism''). Hosts can include other parasitoids, resulting in hyperparasitism; in the case of oak galls, up to five levels of parasitism are possible. Some parasitoids Behavior-altering parasite, influence their host's behaviour in ways that favour the propagation of the parasitoid. Parasitoids are found in a variety of Taxon, taxa across the insect superorder Endopterygota, whose compl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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