An insect is a small animal that has six legs. of insect s. Any scientific study that focuses on insects is considered an entomological study. The mass media continually reinforces this belief with reports about killer bees, giant grasshoppers, poisonous spiders, and crops destroyed by marauding bands of insects.  This cultural indoctrination has produced a society that seems to be increasingly consumed by efforts to eliminate insects from all facets of daily life.  Pest control has become big business.  Nearly 75 million pounds of broad-spectrum insecticides are manufactured and sold each year for use in American homes and gardens.  Annual revenues from insecticide sales to homeowners exceed 450 million dollars. More example sentences. Entomology Multiple Choice Objective Questions are very important for all major competitive Exams. Definition of Attractants in Entomology A chemical which causes the insect to make an oriented movement towards its source is known as attractant. Synonym: persian powder. Entomology; the branch of zoology that studies insects. LiveScience - 20 Startling Facts About Insects, insect - Children's Encyclopedia (Ages 8-11), insect - Student Encyclopedia (Ages 11 and up). Some insects advertise their presence to the other sex by flashing lights, and many imitate other insects in colour and form and thus avoid or minimize attack by predators that feed by day and find their prey visually, as do birds, lizards, and other insects. And scientists are constantly discovering new species. Some insects, such as the mayflies, feed only in the immature or larval stage and go without food during an extremely short adult life. Get exclusive access to content from our 1768 First Edition with your subscription. Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. Most entomologists go on to work in agriculture and conservation, in ecology and land management (national parks for example). Insectus, p.p. The term ‘insect’ is derived from the Latin word insectum which means ‘cut into’. Please select which sections you would like to print: Corrections? Entomology, branch of zoology dealing with the scientific study of insects. Insect definition, any animal of the class Insecta, comprising small, air-breathing arthropods having the body divided into three parts (head, thorax, and abdomen), and having three pairs of legs and usually two pairs of wings. The word insect comes from the Latin word insectum, meaning cut up or divided into segments. Origin: F.insecte, L. Insectum, fr. Learn more. Synonyms: bug, creepy-crawly [British, informal], gogga [South Africa, informal] More Synonyms of insect Then, there is maximum temperature (termed upper cutoff) above which development stops. Let us know if you have suggestions to improve this article (requires login). Insect, (class Insecta or Hexapoda), any member of the largest class of the phylum Arthropoda, which is itself the largest of the animal phyla. Insect, (class Insecta or Hexapoda), any member of the largest class of the phylum Arthropoda, which is itself the largest of the animal phyla. It is a very important branch of agriculture. Entomology definition is - a branch of zoology that deals with insects. Ants, flies, butterflies, and beetles are all insects. Entomon means an insect and logos means to study. Our editors will review what you’ve submitted and determine whether to revise the article. 5. fungi. While Entomology is the study of insects, the persons who study insects are called entomologists. Entomological Science 2: 615-621. This means that when two individuals of a hermaphroditic species encounter … This represents about three-fourths of all described animal species. mass noun. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. Most insects have wings. There are even earlier references to the use of insects in daily life: such as the growing of silkworms that began 4700 BC in China, which was an important part of peasant life in China, as early as 4000 BC. A Few Entomological Terms Defined Term Definition Applies to: abdomen The posterior and usually longest of the 3 principal body segments General anal lobe Lobe in the posterior basal part of wing Wing anal vein Longitudinal unbranched veins extending from base of wing to The majority of insects are small, usually less than 6 mm (0.2 inch) long, although the range in size is wide. Many insects, however, are beneficial from a human viewpoint; they pollinate plants, produce useful substances, control pest insects, act as scavengers, and serve as food for other animals (see below Importance). A hermaphrodite is an organism possessing both male and female sexual organs. Insects have segmented bodies, jointed legs, and external skeletons (exoskeletons). Minor - Insect Science entomology meaning: 1. the scientific study of insects 2. the scientific study of insects. Like several of the other fields that are … Navigate parenthood with the help of the Raising Curious Learners podcast. Despite public perceptions, there are relatively few insects that really fit the above definition of a pest.  Admittedly, a few species (very few) appear to have “no redeeming social value” (pubic lice and bed bugs spring quickly to mind).  But most insects we encounter in our daily lives are either benign or beneficial.  Out of the 800,000 – 1,000,000 species of insects that have been described so far, not more than 1,000 (about 1/10 of 1%) can be regarded as serious pests, and less than 10,000 (about 1%) are even occasional or sporadic pests. Entomology is the study of insects. See more. Updates? Entomology comes from the Latin words entomon, which means insect and logos that means study. Entomology is an ancient science, dating back to the establishment of biology as a formal field of study by Aristotle (384-322 BC). Entomologists make great contributions to such diverse fields as agriculture, chemistry, biology, human/animal health, molecular science, criminology, and forensics. From French entomologie, from Ancient Greek ἔντομον (éntomon, “insect”) + -logie (from Ancient Greek -λογία (-logía, “-logy”)). The insects are the largest group of animals . The threshold and maximum temperatures for development of an insect are used to calculate the number of degree days on a specific day. Insects are also used as environmental quality indicators to assess water quality and soil contamination and are the basis of many studies of biodiversity. Entomolin: = chitin, q.v. Insects have segmented bodies, jointed legs, and external skeletons ( … dentateAs for crenulate but with the projections at the end of each wing being toothlike. The most visible type of Forensic Entomology is used in … See section. They threaten the welfare of useful plants or domestic animals, They damage stored products or structural materials. Entomology 28(1): 22-29. When the study of entomology is used to aid in legal death investigations, it is called Forensic Entomology. Aside from ladybugs (which are considered “cute”) and butterflies (they’re “pretty”), most insects are regarded with a certain degree of fear or revulsion.  A few, like honey bees and praying mantids, may be recognized as “useful”, but all others are just “pests”. The Greek word entomon , meaning “notched,” refers to the segmented body plan of the insect . In many species the difference in body structure between the sexes is pronounced, and knowledge of one sex may give few clues to the appearance of the other sex. Open Peer Review Review Definition Awaiting Peer Review. The orders that contain the greatest numbers of species are Coleoptera (beetles), Lepidoptera (butterflies and moths), Hymenoptera (ants, bees, wasps), and Diptera (true flies). The zoological categories of genetics , taxonomy , morphology , physiology , behaviour, and ecology are included in this field of study. In a popular sense, “insect” usually refers to familiar pests or disease carriers, such as bedbugs, houseflies, clothes moths, Japanese beetles, aphids, mosquitoes, fleas, horseflies, and hornets, or to conspicuous groups, such as butterflies, moths, and beetles. Insects came into earth 480 million years ago. Omissions? Larvae: Lemon Butterfly This Page is Updated Last Updated: 06/11/2020, at 12:20 pm IST. By signing up for this email, you are agreeing to news, offers, and information from Encyclopaedia Britannica. (The plural of insectum, namely insecta, is used by scientists as the name of the taxonomic class that … In some cases the adult insects make elaborate preparations for the young, in others the mother alone defends or feeds her young, and in still others the young are supported by complex insect societies. Articles from Britannica Encyclopedias for elementary and high school students. 4. Honek A (1999) Constraints on thermal requirements for insect development. More than one million different species of insect have been described to date. and delusionary parasitosis Treatment of entomophobia and delusionary parasitosis is difficult because the fear is irrational.  Some success has been achieved with behavioral therapies that involve systematic desensitization, starting first with imagery (pictures) and gradually working up to more direct types of exposure. Insects are often used in investigations of hormonal action, nerve and sense organ function, and many other physiological processes. ‘A large team can now be involved in investigations and she can draw on the expertise of many forensic specialists in anthropology, dentistry and even entomology (the study of insects).’. Behaviour is diverse, from the almost inert parasitic forms, whose larvae lie in the nutrient bloodstreams of their hosts and feed by absorption, to dragonflies that pursue victims in the air, tiger beetles that outrun prey on land, and predaceous water beetles that outswim prey in water. All major entrance exams such as JRF, SRF, NET, CET and RAS include MCQ's from Entomology. Entomogenous: growing in or on an insect: e.g. The minor must include at least 9 credits that are not used to meet any other department, college, or university requirement. Buzzing or swarming insects are often more than just nuisance pests.  “Fly worry” is recognized by poultry and livestock producers as a serious threat to their livelihood.  Large fly populations (even non-biting flies) can decrease milk production in a herd of dairy cattle, depress egg laying in a poultry house, or reduce daily weight gain of feeder pigs.  Economic losses associated with nuisance pests can range from negligible to severe.  At least a dozen species of bird lice (Mallophaga) are considered economic pests by poultry producers.  Although these lice feed only on feathers and dry skin, they cause enough irritation to induce sleeplessness, loss of appetite, and poor health.  Lice populations in excess of 35,000 individuals have been collected from the body of a single chicken. Entomology is the study of insects and related arthropods (crustaceans, spiders, etc). Man came to mother earth only one million years ago. The branch of zoology concerned with the study of insects. Entomology is the study of insects and their relationship to humans, the environment, and other organisms. Most children are fascinated by the living organisms that share their environment; they love to watch an ant groom itself, a bee gather nectar, or a spider build its web.  But this interest is seldom encouraged in our busy society.  Adult attitudes toward insects (and related arthropods) are generally negative — the ant is a nuisance, the bee might sting, and the spider… well just look at what happened to little Miss Muffett! Insects have lived on earth for more than 350 million years. In some, such as the twisted-wing insects (Strepsiptera), the female is a mere inactive bag of eggs, and the winged male is one of the most active insects known. Insects are distinguished from other arthropods by their body, which is divided into three major regions: (1) the head, which bears the mouthparts, eyes, and a pair of antennae, (2) the three-segmented thorax, which usually has three pairs of legs (hence “Hexapoda”) in adults and usually one or two pairs of wings, and (3) the many-segmented abdomen, which contains the digestive, excretory, and reproductive organs. In: JH Byrd, JL Castner, (Eds. Some colonies of social insects, such as tropical termites and ants, may reach populations of millions of inhabitants. Professor of Biology, University of Cambridge, 1952–66; Director, Agricultural Research Council Unit of Insect Physiology, 1943–67. Entomology is a branch of biology dealing with the study of insect s. It includes morphology, physiology, behavior, genetics, biomechanics, taxonomy, ecology, etc. Number of Questions Added: 2, #75-76. decticousFunctional mandibles present in pupal state. Entomography: the description of an insect or of its life history. So, if you don't know your Aculeates from your Zoraptera or your Blues from your Woolly bears then this is the glossary for you. Entomology: that branch of Zoology that deals with insects and, specifically, the Hexapods. Aesthetic pests cause no damage and inflict no injury.  They may be annoying, unsightly, or disruptive (like chirping crickets that keep you awake at night, or dance flies that swarm around your head in the spring), but their presence will cause no injury or financial liability.  An insect is most likely to be regarded as an aesthetic pest when it inadvertently invades a home or business establishment.  The human occupants of these environments are seldom tolerant of other species — even the most benign visitors are promptly executed (or forcibly evicted).  Boxelder bugs (Boisea trivittata) are typical victims of such intolerance.  In autumn, homeowners may become upset when they discover aggregations of these red and black insects on brick walls, foundations, or concrete steps near a residence.  The bugs may be numerous and occasionally annoying, but they do not bite or sting, they pose no threat to the house or its contents, and they will eventually move elsewhere to find overwintering quarters.  Still, a large can of insecticide is the homeowner’s typical response. Furthermore, insects are valuable objects of study in elucidating many aspects of biology and ecology. Among social insects, queen termites may live for up to 50 years, whereas some adult mayflies live less than two hours. To some extent, a fear of insects is quite normal.  You may react instinctively to brush away an annoying fly or jump back at the sudden appearance of a spider.  But some people are so afraid of insects that it can affect their ability to function normally in society. These people suffer from entomophobia, an irrational and often debilitating fear of insects.  People with severe entomophobia are frequently confined to their homes; they are unable to enjoy gardening, walking in the woods, or visiting the beach because they dread an encounter with an insect.  Psychiatrists estimate that 1-2% of the adult U.S. population is affected by some degree of entomophobia that limits their activity or interferes with their quality of life. discoidal cellIn damselflies (Zygoptera) a basal quadrangular cell in the wing venation, which is delimited by veins MA (anterior side), MP (posterior side), MAb (distal side) and the arculus (basal side). ), Forensic entomology - the utility of arthropods in legal investigations, CRC Press. But how much do you really know about their behavior and origins? detritophagyfeeding on ground remains of plants and animals. The glossary contains definitions for over 400 terms relating to entomology, insects and other invertebrates. The human occupants of these environments are seldom tolerant of other species — even the most benign visitors are promptly executed (or forcibly evicted). In fact, about 75 percent of all animals are insects. In numbers of species and individuals and in adaptability and wide distribution, insects are perhaps the most eminently successful group of all animals. Insects and spiders are fascinating, from delicate butterflies to dancing honeybees and fuzzy tarantulas. Occasionally, a fear or loathing of insects is compounded by the victim’s own imagination.  Some people convince themselves that their body has become “infested with parasites” and go to great lengths to rid themselves of the imaginary vermin.  This type of paranoia, known medically as delusionary parasitosis, is generally regarded as a form of obsessive/compulsive behavior.  It is common enough to be recognized as a psychological disorder by the American Medical Association.  One case study, reported in 1957, documents a woman who believed she was infested with “termites” that would periodically emerge from the joints of her arms and legs.  Her physician sent her home to “collect some specimens” and a week later she returned with a plastic bag full of “termites” which, upon microscopic examination, proved to be scabs and skin fragments she had picked or scratched from her body. Insect powder,a powder used for the extermination of insects; especially, the powdered flowers of certain species of pyrethrum, a genus now merged in Chrysanthemum. Many insect depend for their survival follow an odour trial to a source of food to host plant and animals to … dorsum / dorsal area… INDEX S. … Today there are about 1 million known species, or types, of insect. Entomology is the study of insects. Much of the scientific knowledge of genetics has been gained from fruit fly experiments and of population biology from flour beetle studies.   Through these attitudes we send our children a clear, subconscious message that insects (and most other parts of the natural environment) are unsafe, unclean, and unappealing.  Most children adopt this viewpoint before they leave elementary school; they grow up, like their parents, convinced that the “only good bug is a dead bug”. They dominate the present-day land fauna with about 1 million described species. They are the most abundant group of animals in the world and live in almost every habitat. An insect is most likely to be regarded as an aesthetic pest when it inadvertently invades a home or business establishment. Entomology 1 ENTOMOLOGY Undergraduate Minors All minors require at least 15 credits, including at least 6 credits in courses numbered 300 or above taken at Iowa State University. Welcome to our entomological glossary. Insects developed on Earth long before humans did. Of insecare to cut in. These values are used to predicting insect activity and appearance of symptoms during the growing season. This wider meaning may still be encountered in informal use. Simply put, entomology is a branch of science which deals with everything about insects and other related arthropods. Modes of reproduction are quite diverse, and reproductive capacity is generally high. More about entomophobia Definition of entomology noun in Oxford Advanced Learner's Dictionary. One inspiring story of creativity in veterinary entomology is the 'sterile insect technique', which successfully rid the US of screwworm flies by 1982. insect (n.) c. 1600, from Latin (animal) insectum "(animal) with a notched or divided body," literally "cut into," noun use of neuter past participle of insectare "to cut into, to cut up," from in-"into" (from PIE root *en "in") + secare "to cut" (from PIE root *sek-"to cut").. This notion of “pest” is unique to humans and completely anthropocentric.  We define pests in terms of our own standards of good and bad — standards that are often based largely on aesthetics, economics, and personal welfare, and shaped by cultural bias and personal experiences.  A “pest” is defined as any organism that causes annoyance or injury to human beings, human possessions, or human interests.  The injury may be physical (bites and stings), medical (causing illness or disease), or economic (monetary loss to goods or property).  Injury may arise directly from the pest itself, or may develop indirectly as a result of the actions or behavior of the pest. Entomology is the scientific study of insects, a branch of zoology. Some of the feather-winged beetles and parasitic wasps are almost microscopic, while some tropical forms such as the hercules beetles, African goliath beetles, certain Australian stick insects, and the wingspan of the hercules moth can be as large as 27 cm (10.6 inches). Penny Gullan and Peter Cranston are professors in the Department of Entomology, University of California, Davis, USA., where they jointly teach undergraduate courses in biodiversity, insect systematics and general entomology, and conduct research on Coccoidea and Chironomidae, respectively. Entomologist: one who collects and studies insects. In reality, many of the insects we label as pests are essential components of our natural ecosystem — we can’t seem to live with them, but neither could we live without them!  Termites, for example, are serious pests when they move into the floor joists of a home.  An infestation may cost hundreds of dollars to eradicate, and if ignored, could eventually destroy the house.  But in a forest ecosystem, these termites are beneficial.  They are a vital component of the biogeochemical cycle that releases nutrients from dead plant material.  Without termites and other decomposers living on the forest floor, organic molecules would be locked away in piles of dead wood, unavailable to living organisms until released by fire or erosion. No Reviews yet for this version. Entomology is the scientific study of insects, a branch of arthropodology, which in turn is a branch of biology. They maintain strong connections to the Australian National University, Canberra, where, … In general, the species we regard as pests usually affect us in one or more of the following ways: These categories are not mutually exclusive.  Many of our most serious pests (cockroaches, for example) could be listed in several of these categories. dendrophagyfeeding on trees. Put simply, entomology is a branch of zoology (the study of animals) that studies insects and how they interact with their environment, other species and humans (1). disc / discal areaThe central band passing through the cell. Entomologists estimate the actual number of living insect species could be as high as 5 million to 10 million. In the past the term "insect" was vaguer, and historically the definition of entomology included the study of terrestrial animals in other arthropod groups or other phyla, such as arachnids, myriapods, earthworms, land snails, and slugs. 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