The western conifer seed bug (Hemiptera: Coreidae) has the potential to bite humans. Leptoglossus occidentalis Western Conifer Seed Bug Family: Coreidae A very large and spectacular squashbug which has characteristic expansions on the hind tibiae and a white zigzag mark across the centre of the forewings. It is fairly large, measuring about ¾ inch long, and is reddish brown with a few white markings. It has long antennae and expanded, flattened areas on its hind legs. WCS bugs plague much of the North American continent, and the great state of Colorado is no exception. Generally does not bite/sting, but has been recorded (see references), Not known to infect people or pets, damage property, or even reproduce indoors, Gives off a pungent odor as defense if molested, Hemiptera (True Bugs, Cicadas, Hoppers, Aphids and Allies), True Bugs, Cicadas, Hoppers, Aphids and Allies (Hemiptera), Western Conifer Seed Bug (Leptoglossus occidentalis). Disclaimer: Dedicated naturalists volunteer their time and resources here to provide this service. Contributors own the copyright to and are solely responsible for contributed content.Click the contributor's name for licensing and usage information. The female lays rows of 1 ... western conifer-seed bug. The western conifer-seed bug (Leptoglossus occidentalis, hereafter referred to as WCSB) is a coreid bug that feeds on conifers. As the name indicates, these bugs have long hind legs that end with a flattened, leaf-like structure. Ines Carrara Getty Images. Life Cycle Nymphs and adults spend the summer on pines and Douglas firs, feeding on sap from green cones and needles. The western conifer-seed bug, also known as the western pine-seed bug, belongs to a small group of true bugs called the leaf-footed bugs. Eggs hatch in about 10 days and the nymphs feed on the scales of the cones and occasionally the needles. There is a prominent orange, yellow or white and black pattern on the upper side of the abdomen, and the bugs make a loud buzzing sound when in flight. They have long, thin antennae and hind legs that are flattened (leaf-like). As well, they can damage crops as they feed, by excreting a digestive enzyme to liquefy the seed … If you need expert professional advice, contact your local extension office. This feeding does not harm landscape trees in the Midwest. Life cycle:  Usually a single generation of Western conifer seed bugs occurs each year. The Western Conifer Seed Bug (WCSB) is an intimidating-looking insect that moves into homes in late fall to take shelter. Adults are 3/4 inch long and brownish on top. 2017. Dull reddish-brown with faint (or absent) white zigzag stripe across hemelytra; antennae may be almost as long as body. 4. Corium. The eggs will hatch in 10 to 14 days. The emerging nymphs look similar to the adult, but are wingless and orange-brown, changing to a … Works Cited. The seed bug often gets confused with similar looking insects such as kissing bugs, or stink bugs. Outer hind tibial dilation nearly equal in length to inner dilation. Adults lay eggs from mid-June to early August. Life cycle: Usually a single generation of Western conifer seed bugs occurs each year. Western Conifer Seed Bug Adult The young nymphs of L. occidentalis are orange, and they beco… What is the Western Conifer Seed Bug's Reproductive Cycle? WCSB . Looking like a weird hybrid between a beetle and a locust, WCS bugs are usually dark brown in color. This orange and black pattern on the abdominal dorsum is revealed during flight. Kingdom Animalia (Animals) Phylum Arthropoda (Arthropods) Western conifer seed bugs do not bite or cause damage in the home. But the fastest way to identify the western conifer seed bug is to look at the lower hind leg. The flight pattern and loud buzz produced by this strong flying conifer pest resemble those of a bumble bee. In spring, the female western conifer seed bug will lay her eggs in the needles of a host tree. Native to w. NA, spreading eastward since the 1950s, recently introduced to Europe (first record: Italy 1999) and now widespread there, Coniferous trees; adults may wander indoors late in the season looking for shelter to spend the winter, Nymphs and adults on conifers in spring and summer; adults often seen around homes during fall/winter, sap from green cones, twigs, seed pulp, and sometimes needles of Pinaceae (pines, hemlock, spruce, Douglas-fir). Movemen… Glossary. Life cycle: According to observations made in the western United States, the western conifer seed bug produces a single generation each season. The upper (dorsal) side of the abdomen is yellow or light orange with five transverse black patches. Everything else copyright © 2003-2020 Iowa State University, unless otherwise noted. The pine seed bug is in a small group of insects called the leaffooted bugs. They reach adulthood in late August. Indoors they are best managed by vacuuming. A type of Leaf-Footed Bug, Western Conifer Seed Bugs have long bodies and wide, flattened 'thighs'. The adult is about 3/4 inch (16-20 mm) in length and is dull brownish. It’s often misidentified as a Stink Bug, Cockroach or as the biting “Kissing Bug” due to its vaguely similar appearance. The Western Conifer Seed Bug has a body length of about 3/4”. Connect with your County Extension Office », Find an Extension employee in our staff directory », Get the latest news and updates on Extension's work around the state, Feedback, questions or accessibility issues: info@extension.wisc.edu | © 2020 The Board of Regents of the University of Wisconsin System Privacy Policy | Non-Discrimination Policy | Discrimination and Harassment Complaints | Disability Accommodation Requests | Civil Rights. There are checkers of black and white along the margins of the lower portion of the back. As the weather cools in September, western conifer-seed bugs … This true bug of the family Coreidae feeds mainly on the seeds and developing cones of several species of conifers and their respective hybrids. Life cycle of western conifer-seed bugs Nymphs and adults spend the summer on pines and Douglas firs, feeding on sap from green cones and needles. Western conifer seed bugs can be damaging on tree farms. The adult is about three-quarters of an inch long. L. occidentalis, also known as the western conifer seed bug, is primarily found in association with conifer trees. Adults are 3∕4 of an inch long, elongate, reddish to dull brown with a faint, white zigzag straight line across the center of the wings. One generation per year. Insecticidal soap sprays or general insecticides can be used to kill insects clustered on the outside during the fall. The western conifer seed bug (Leptoglossus occidentalis), sometimes abbreviated as WCSB, is a species of true bug (Hemiptera) in the family Coreidae. The western conifer seed bug, known scientifically as Leptoglossus occidentalis, may also be known as a stink bug. Elm seed bug cause nuisance problems by moving into buildings in summer and early autumn. Western conifer seed bugs also have well developed scent glands that emit strong pine-like odors. Synthetic pyrethroids have been used to kill seed bugs in Idaho’s conifer farms, but the sprays may also kill the natural enemies. Adult bugs are ¾” long and brown on the top. In spring the bugs move to conifers and feed on the developing seeds and early flowers. Adult The western conifer seed bug (WCSB) is approximately ¾” long (16-20mm). Adults emerge from overwintering sites in late May or early June and feed on one-year cones and inflorescences. Revised:  4/27/2004 The Western Conifer Seed Bug (Leptoglossus occidentalis) is often mistaken by people for either the Asian Longhorned Beetle, or for an Assassin Bug.. In spring the bugs move to conifers and feed on the developing seeds and early flowers. Eliminate or caulk gaps around door and window frames and soffits, and tighten loose-fitting screens, windows or doors. One generation of western conifer seed bugs is born per year. This feeding damage does not hurt the tree, but reduced seed production may result from heavy infestations. Western conifer seed bugs have become more numerous in Wisconsin during the last five years. Western conifer seed bugs have a piercing, sucking moth part, and nymphs (immature insects) feed by sucking nutrients from the seed cones of white, red, Scots, Austrian, and mugo pine, white spruce, Douglas fir and hemlock. The Western Conifer Seed Bug also seeks the warmth of your home to bunker down in for the winter. The western conifer seed bug has a body length of 3/4 of an inch with a brownish top. One generation per year. Femur. 9 Western Conifer Seed Bug. It’s brown with a faint white zig-zag stripe across its midsection. Originally found only in the western United States, these bugs are now found all across the country, and even in parts of Canada. The western conifer seed bug (Leptoglossus occidentalis), also called the pine seed bug, is a commonly found insect which is often seen invading homes in large numbers during certain periods of spring, fall, and winter. What it looks like: These bugs are shaped a bit like a stink bug and grow up to 3/4 inch long. Western conifer seed bug (Leptoglossus occidentalis) The western conifer seedbug was first described in the western United States. When adults find their way indoors, simply vacuum or hand-remove them. Your donation to BugGuide will be matched up to $2500! They sometimes are called "walky bugs" in Ohio due to the slow and stead… If they can crawl under siding or through other openings into the home, these insects will overwinter in the house and re-emerge on warm, sunny days during the winter and spring months. Western conifer seed bugs are also often mistakenly identified as assassin bugs. Western conifer seed bugs can fly readily and may make a buzzing noise if disturbed. Though they are not known to bite, their presence causes uneasiness in many people. The western conifer seed bug’s name is self-explantory: young bugs suck juices from seeds … Many people mistake these seed bugs for skinny stink bugs due to their similar appearance. It has several color variations along its body, ranging from light tan, to orange, and dark brown. They’re between 16 and 22 millimeters in length, depending on gender. It is a type of leaf-footed bug that feeds on seeds of trees, especially pine. Hornok, S. and J. Kontschan. A western conifer seed bug, a type of leaf-footed bug, is a common insect in Canada. They use this mouthpart to probe … Females lay rows of eggs on host needles; eggs hatch in ~10 days and nymphs begin to feed on tender cone scales and sometimes the needles; 5 nymphal instars; adults appear by late August and feed on ripening seed. We teach, learn, lead and serve, connecting people with the University of Wisconsin, and engaging with them in transforming lives and communities. The Western conifer seed bug is almost an inch long, brownish, with a light orange border around its abdomen, marked by five black patches on each side. While their name implies they are a Western insect, they have extended their range across the US, and are now a common sighting in New England. Life Cycle . In flight, the adults make a … An EEO/AA employer, University of Wisconsin-Madison Division of Extension provides equal opportunities in employment and programming, including Title VI, Title IX, the Americans with Disabilities Act (ADA) and Section 504 of the Rehabilitation Act requirements. Western conifer seed bugs do not bite or cause damage in the home. 3. It does not harm the wood of a home, but is by and large merely a nuisance. Leaf-footed bugs can affect different crops depending on how early the feeding occurs in the plant’s growth, leading to severe deformities, dead leaves, and shrivelled, deformed, or shrunken seeds. The elm seed bug is an insect that has newly arrived in Colorado that feeds on the seeds of Siberian elm. Phil Pellitteri, UW Insect Diagnostic Lab Western Conifer Seed Bugs are a type of "true bug", or Heteroptera. Western conifer seed bugs belong to the leaf-footed bug family Coreiidae. 2. Read on to find out what to do if you encounter one indoors. Eggs are laid in mid- to late spring4 in rows along the needles of conifers. For more information: Contact your county Extension agent/educator. For that reason they are sometimes incorrectly called stink bugs. Groups of Western Conifer Seed Bugs can enter a house, office building, or warehouse in the autumn through torn window screens, open doors, and chimneys. First instar nymphs feed on needles and cone scales. The thickened basal portion of the front wing that lies between the clavus and the membrane of insects in the family Hemiptera. Although it does not bite or sting, as a member of the stink bug family, it often releases an offensive odor when handled — part of the insect’s defensive strategy. They can become a nuisance when they crawl up the sides of buildings during September and October. If a grower chooses to spray, they should wait until the seed bug eggs have hatched. 1. This harmless nuisance most closely resembles the squash bug found on pumpkin and squash foliage during the summer. The western conifer seed bug belongs to the family Coreidae, commonly called leaf-footed bugs, and like many members of this family, it has a flattened, leaf-like expansion on the hind legs. The eggs, which are laid in chains on conifer needles, measure about 2 mm each in length. However, you will not find Kissing Bugs in New England and Stink Bugs are not as common to the region either. It is distinctive in appearance because it possesses leaf-like structures on its large back legs. The best management of elm seed bugs is to seal cracks and crevices on the exterior of buildings so the insects cannot enter. We strive to provide accurate information, but we are mostly just amateurs attempting to make sense of a diverse natural world. However, the western conifer seed bug is unrelated to true stink bugs; true stink bugs belong to the Pentatomoidea family of insects and tend not to wander indoors. ... Life Cycle. The species is native to western United States and has become invasive in the Eastern part of the U.S., several European and Asian countries, and most recently in … DAMAGE. Sometimes they cluster in small groups and enter buildings at the onset of cold weather as they seek a protected site to spend the winter. They do not reproduce indoors. Life Cycle: Adults emerge in late May or early June. It is native to North America west of the Rocky Mountains (California to British Columbia, east to Idaho and Nevada) but has in recent times expanded its range to eastern North America, to include Nova Scotia, Maine, Connecticut, Massachusetts, and New Hampshire, and has become an accidental introduced species in parts of Europe. The pine seed bug, also called the Western conifer seed bug, (Leptoglossus occidentalis) is a common household accidental invader found inside Iowa homes during the fall, winter and spring. After about two weeks, nymphs hatch from eggs and take about five weeks to mature into adults. A western conifer-seed bug moves slowly, flies readily, is commonly seen during the day, and has antennae that extend less than half the length of its body. Leaffooted bugs have piercing-sucking mouthparts that extend more than half of the length of the narrow body. They will hatch after approximately 2-2 ½ weeks. The western conifer seed bug is a hard one to miss. Field Guide to UK Hemiptera, Bug identification. There is a faint white zigzag stripe across the midpoint of its upper surface. Western Conifer Seed Bugs. In the fall, the Western Conifer Seed Bug enters buildings through cracks and crevices searching for protection from cold temperatures. Control:  The first line of defense against Western conifer seed bugs is to prevent their entry into the home. Screen attic, overhang, and wall vents to mechanically block points of entry for the insect. Nymphs pass through 5 instars and reach adulthood by late August. Often confused with the stink bug due to a similar shape and the ability to release a bitter smell, the West Conifer Seed Bug is a tree bug that feeds on the sap of conifer trees (its preference) or other trees. Seed bugs however can easily be identified by 3 unique characteristics: 1. Feedback, questions or accessibility issues: © 2020 The Board of Regents of the University of Wisconsin System. Classification . 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