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Leafhopper
A leafhopper is the common name for any species from the family Cicadellidae. These minute insects, colloquially known as hoppers, are plant feeders that suck plant sap from grass, shrubs, or trees. Their hind legs are modified for jumping, and are covered with hairs that facilitate the spreading of a secretion over their bodies that acts as a water repellent and carrier of pheromones. They undergo a partial metamorphosis, and have various host associations, varying from very generalized to very specific. Some species have a cosmopolitan distribution, or occur throughout the temperate and tropical regions. Some are pests or vectors of plant viruses and phytoplasmas. The family is distributed all over the world, and constitutes the second-largest hemipteran family, with at least 20,000 described species. They belong to a lineage traditionally treated as infraorder Cicadomorpha in the suborder Auchenorrhyncha, but as the latter taxon is probably not monophyletic, many mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phytoplasma
Phytoplasmas are obligate intracellular parasites of plant phloem tissue and of the insect vectors that are involved in their plant-to-plant transmission. Phytoplasmas were discovered in 1967 by Japanese scientists who termed them mycoplasma-like organisms. Since their discovery, phytoplasmas have resisted all attempts at ''in vitro'' culture in any cell-free medium; routine cultivation in an artificial medium thus remains a major challenge. Phytoplasmas are characterized by the lack of a cell wall, a pleiomorphic or filamentous shape, a diameter normally less than 1 μm, and a very small genome. Phytoplasmas are pathogens of agriculturally important plants, including coconut, sugarcane, and sandalwood, in which they cause a wide variety of symptoms ranging from mild yellowing to death. Phytoplasmas are most prevalent in tropical and subtropical regions. They are transmitted from plant to plant by vectors (normally sap-sucking insects such as leafhoppers) in which they both surv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brochosome
Brochosomes are intricately structured microscopic granules secreted by leafhoppers (the family Cicadellidae of the insect order Hemiptera) and typically found on their body surface and, more rarely, eggs. Brochosomes were first described in 1952 with the aid of an electron microscope. Brochosomes are hydrophobic and help keep the insect cuticle clean. These particles have also been found in samples of air and can easily contaminate foreign objects, which explains erroneous reports of brochosomes on other insects.Rakitov R.A. (2011Contamination as the cause of erroneous records of brochosomes.''Psyche: A Journal of Entomology '' 2011, Article ID 767963, . Structure and composition The name, derived from the Greek words ''βρóχoς'' ("brochos": mesh of a net) and ''σωμα'' ("soma": body), refers to the characteristic reticulated surface of the granules. Most species of leafhoppers produce hollow spherical brochosomes, 0.2–0.7 micrometres in diameter, with a honeycombed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Proconiini
The name sharpshooter is used to refer to any of various genera and species of large leafhoppers in the tribe Proconiini of the family Cicadellidae. As with all cicadellids, they have piercing-sucking mouthparts and closely spaced rows of fine spines on their hind legs. The nymphs feed by inserting their needle-like mouthparts into the xylem of the small stems on the plant where the eggs were deposited; the adults have wings and are highly mobile, and most feed on a variety of different plant species. Both nymphs and adults filter a huge volume of dilute liquid through their digestive system to extract the trace nutrients, and much of the water and carbohydrates are squirted forcibly away from the body in a fine stream of droplets, thus earning them their common name. This group includes a few species which are plant pests, the most serious of which is ''Homalodisca vitripennis'' (the "Glassy-winged sharpshooter"). A microbial plant parasite, ''Xylella fastidiosa'', is carried b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eurymeloides Bicincta
''Eurymeloides bicincta'', commonly known as the two-lined gum-treehopper, is a leafhopper in the family Cicadellidae. It is the type species of the genus '' Eurymeloides''. It is a sap-sucking insect and is found on gum-trees in its native southeastern Australia. Description ''Eurymeloides bicincta'' grows to a length of about . The adult is wedge-shaped and is black with large orange eyes and white lines on its wings. The nymphs are orange. Ecology ''Eurymeloides bicincta'' is found on ''Eucalyptus'' trees where both nymphs and adults have piercing mouthparts and suck the sap. The excess fluid is secreted and is fed upon by ants which are often found associated with the leafhoppers. The ants do not harm the leafhoppers but may drive off potential predators. Some sand wasps in the tribe Nyssonini The Nyssonini are a group of cleptoparasitic bembicine wasps generally distinguished by the petiolate second submarginal cell of the forewing and rather strongly sculptured he ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Auchenorrhyncha
The Auchenorrhyncha suborder of the Hemiptera contains most of the familiar members of what was called the "Homoptera" – groups such as cicadas, leafhoppers, treehoppers, planthoppers, and spittlebugs. The aphids and scale insects are the other well-known "Homoptera", and they are in the suborder Sternorrhyncha. Distributed worldwide, all members of this group are plant-feeders, and many are vectors of viral and fungal diseases of plants. It is also common for Auchenorrhyncha species to produce either audible sounds or substrate vibrations as a form of communication. Such calls range from vibrations inaudible to humans, to the calls of many species of cicadas that can be heard for hundreds of metres, at least. In season, they produce the most characteristic and ubiquitous noise of the bush. Etymology The word auchenorrhyncha is from the Greek αὐχήν, 'neck, throat' and ῥύγχος, 'snout'. Classification Debate and uncertainty as to whether the Auchenorrhync ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cicadellinae
CicadellinaeLatreille (1825) is a leafhopper subfamily in the family Cicadellidae. Selected genera * '' Bothrogonia'' * '' Cicadella'' * ''Cofana ''Cofana'' is a genus of leafhoppers belonging to the family Cicadellidae. ''Cofana'' species can be often found in grass habitats and in rice fields. Some species have been recorded on '' Dinochloa scandens'' (Poaceae). The genus ''Cofana'' is ...'' * '' Graphocephala'' * '' Homalodisca'' * '' Zyzzogeton'' References External links Cicadellidae {{Cicadellinae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eurymela Distincta
''Eurymela distincta'' is a species of leafhopper native to the Australian continent. It has a wedge-shaped body that is 10–12 mm long (adult male) or 12–14 mm long (adult female). The head is black with cream or white maxillary plates. The pronotum and scutellum are black. The tegmen is black with a blue or purple tinge, and one to three white fasciae. The costal margin is black. Legs are scarlet close to the body and black further away. Underparts are scarlet. ''E. distincta'' mainly feeds on the bangalay (''Eucalyptus botryoides'') and the apple box (''Eucalyptus bridgesiana''), though it has also been recorded on manna gum ('' E. viminalis''), black gum ('' E. aggregate'') and Camden woollybutt ('' E. macarthurii''). Nymphs and adults may be attended by up to 20 ants of the genus ''Iridomyrmex'', which also attend female scale insects of the species ''Eriococcus coriaceus'' and '' E. confusus'' that infest the same trees. The ants eat the leaf-hoppers' sugary ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plant Sap
Sap is a fluid transported in xylem cells (vessel elements or tracheids) or phloem sieve tube elements of a plant. These cells transport water and nutrients throughout the plant. Sap is distinct from latex, resin, or cell sap; it is a separate substance, separately produced, and with different components and functions. Insect honeydew is called sap, particularly when it falls from trees, but is only the remains of eaten sap and other plant parts. Types of sap Saps may be broadly divided into two types: xylem sap and phloem sap. Xylem sap Xylem sap (pronounced ) consists primarily of a watery solution of hormones, mineral elements and other nutrients. Transport of sap in xylem is characterized by movement from the roots toward the leaves. Over the past century, there has been some controversy regarding the mechanism of xylem sap transport; today, most plant scientists agree that the cohesion-tension theory best explains this process, but multiforce theories that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antenna (biology)
Antennae ( antenna), sometimes referred to as "feelers", are paired appendages used for Sensory system, sensing in arthropods. Antennae are connected to the first one or two Segmentation (biology), segments of the arthropod head. They vary widely in form but are always made of one or more jointed segments. While they are typically sensory organs, the exact nature of what they sense and how they sense it is not the same in all groups. Functions may variously include sensing tactition, touch, air motion, heat, vibration (sound), and especially insect olfaction, smell or gustation, taste. Antennae are sometimes modified for other purposes, such as mating, brooding, swimming, and even anchoring the arthropod to a substrate (biology), substrate. Larval arthropods have antennae that differ from those of the adult. Many crustaceans, for example, have free-swimming larvae that use their antennae for swimming. Antennae can also locate other group members if the insect lives in a group, lik ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ocellus
A simple eye (sometimes called a pigment pit) refers to a form of eye or an optical arrangement composed of a single lens and without an elaborate retina such as occurs in most vertebrates. In this sense "simple eye" is distinct from a multi-lensed "compound eye", and is not necessarily at all simple in the usual sense of the word. The structure of an animal's eye is determined by the environment in which it lives, and the behavioural tasks it must fulfill to survive. Arthropods differ widely in the habitats in which they live, as well as their visual requirements for finding food or conspecifics, and avoiding predators. Consequently, an enormous variety of eye types are found in arthropods. They possess a wide variety of novel solutions to overcome visual problems or limitations. Use of the term ''simple eye'' is flexible, and must be interpreted in proper context; for example, the eyes of humans and of other large animals such as most cephalopods, are '' camera eyes'' and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arthropod Leg
The arthropod leg is a form of jointed appendage of arthropods, usually used for walking. Many of the terms used for arthropod leg segments (called podomeres) are of Latin origin, and may be confused with terms for bones: ''coxa'' (meaning hip, plural ''coxae''), ''trochanter'', ''femur'' (plural ''femora''), ''tibia'' (plural ''tibiae''), ''tarsus'' (plural ''tarsi''), ''ischium'' (plural ''ischia''), ''metatarsus'', ''carpus'', ''dactylus'' (meaning finger), ''patella'' (plural ''patellae''). Homologies of leg segments between groups are difficult to prove and are the source of much argument. Some authors posit up to eleven segments per leg for the most recent common ancestor of extant arthropods but modern arthropods have eight or fewer. It has been argued that the ancestral leg need not have been so complex, and that other events, such as successive loss of function of a ''Hox''-gene, could result in parallel gains of leg segments. In arthropods, each of the leg segments arti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subfamily
In biological classification, a subfamily (Latin: ', plural ') is an auxiliary (intermediate) taxonomic rank, next below family but more inclusive than genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nom .... Standard nomenclature rules end subfamily botanical names with "-oideae", and zoological names with "-inae". See also * International Code of Nomenclature for algae, fungi, and plants * International Code of Zoological Nomenclature * Rank (botany) * Rank (zoology) Sources {{biology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
