Poisonous green stink bug

Poisonous green stink bug

Poisonous green stink bug. Apr 4, 2024 · For example, the green and the southern green stink bugs look alike, but the green stink bug has a pointed spine between its hind legs which the southern varieties lack. However, the immature stages have a distinctive pattern of whitish spots on the Read More → Jun 12, 2024 · The brown marmorated stink bug is a stowaway from Asia that entered the U. Believed to have originated in Ethiopia , it can now be found across the world. Advertisement Fire ants are aggressive insects that can inflict bites and veno A panicked Thai father calls his wife while she’s grocery shopping. This arti Are you wondering about treating fire ant bites? Learn about treating fire ant bites in this article. Cologne poisoning occurs when someone swallows cologne. But they can accidentally enter your home. Immature stages vary in color from black for very small nymphs to green for larger nymphs. Their newborn baby is crying inconsolably—what should he do? After a comical series of attempts to quiet the bab Avoiding Poison Ivy - Avoiding poison ivy is often difficult because you can still get it from tools that have touched the plant. Do you want to know the secret to transform your backyard into a haven for birds and butterflies? If so, then check this course out! Assassin Bugs May 11, 2006 · my male jackson was about to eat a green stinkbug today but i stoped him because i didn't know if it is ok. Sample crops in the early to mid-morning when bugs are more likely to be at the top of the crop. Insecticides are one o. The hawthorn shield bug (Acanthosoma haemorrhoidale) is a common European shield bug. Get tips for avoiding poison ivy. Poisonous butterflies can be identified by bright colors or warning markings. These small, shield-shaped insects not only feed on plants but also emit a pungent odor when threatened or squashed. At the top, you’ve got your pasta sauce It’s the summer of 1858. But Fire ants are red-colored insects. The exceptionally hot summer months have exacerbated the problem. This Really Happened. Western conifer seed bugs are sometimes colloquially called stink bugs. The green stink bug's color is typically bright green, with narrow yellow, orange, or reddish edges. Figure 5. (McPherson 1982, Capinera 2001). Arsenic poisoning symptoms lead to multi-organ failure if not treated. [ 1 ] Jun 30, 2023 · Related Reading swallowing a bug. Researchers have known for some time that the food and drink we all consume contains ar See also separate article Bioterrorism and Primary Care . What do green stink bugs do? Green stink bugs eat a wide Factors Influencing Spider-Stink Bug Interaction Availability of stink bug populations in spider habitats. Crops Affected: apples, cherries, peaches, pears, plums Stink bugs are aptly named because of the odor they release when they’re crushed or when they sense a threat. Even though they have a smelly reputation, stink bugs are pretty harmless to people and animals in general(but we can’t say the same for fruits and vegetables). Check the undersides of leaves for egg masses as well. In the case of carb Food poisoning occurs when individuals eat contaminated food. Recently emerged first instar nymphs of the southern green stink bug, Nezara viridula (Linnaeus). The Gas Mask with Filters can be equipped to temporarily prevent taking damage from it. Removing the poison pillars is only possible since Update 8 Tiny Green Bugs That Can Bite You. If you’re tired of Stink bugs are notorious pests that can invade homes and gardens, causing a nuisance and emitting a foul odor when disturbed. Pale green assassin bugs; Green leafhoppers; Green thrips; Katydids; Ambush bugs; Green Tiger beetles; Dogbane leaf beetles; Sweat bees; Most of these small green bugs are beneficial insects that prefer to live in your garden. Some stink bug mothers (and a few fathers) guard their young. In many cases, the pesticides used to control insect problems are more harmful than the insect itself. Next, take the bucket of soapy water out to your citrus tree. This can be by accident or on purpose. Stink bugs tend to prefer warm and dry conditions. Spore Flowers, when detonated by Nobelisk, will stop producing poison gas. Jul 31, 2024 · Knock the stink bug into the jar. The bug was initially found in Poisoned? Call 1-800-222-1222 or HELP ME online. Don’t eat insects if you are allergic to shellfish. While they do use a foul-smelling spray as a defense, they are not classified in the stink bug family Pentatomidae . Adult katydids are over 2 inches long. So it’s a really good clue to quickly know if you’re looking at a good stink bug, or a bad one. 71 inches (13-18mm) in size, found throughout North America in gardens, woods, orchards, and crops – in particular, tomato, pea, bean, corn, eggplant, soybean, and cotton. They are about the size of a fingernail. For instance, the goliath birdwing from Indonesia has bright yellow and green wings. Also like other stinkbugs, the folded wings form an X pattern on the back. Green Stink Bug. Green Stink Bugs are notorious for the extensive damage they can cause to a wide variety of crops. Jun 27, 2024 · Stink bugs put off a defensive secretion that, while foul-smelling, is not poisonous. Learn about the stink plant. If you’re dealing with these pesky insects, it’s essential t Stink bugs are not only a nuisance but also can cause damage to crops and plants. However, there is a possibility that the nasty smelling bodily fluids released when stink bugs are eaten or crushed may irritate your dog’s eyes or mouth. ; horseweed, Conyza spp. If the toxic fluid gets into the human eye, it can cause unexpected chemical burns or injury. You may even be able to name them by I have heard that carbon monoxide is extremely poisonous. Some species of stink bugs can fly and may escape if you do not manage to flick it off in one fell swoop. We would like to show you a description here but the site won’t allow us. Aug 14, 2024 · Many common insects are harmless to cats, but some can be poisonous or cause injury. Adult green stink bugs are bright green with the entire lateral margin lined in yellow or orange. Fire ants are red-colored insects. Insecticide poisoning occurs when someone swallows or breathes in this substance or it is absorbed through the skin. Related Reading Best Way To Repel Bed Bugs From Biting You. Think like a stink bug and look for similar areas on your house: Pipes; Fascia boards; Windows; Wiring outlets; Soffits; Door frames; Seal it all up! Some areas can’t be sealed with caulking such as chimney openings, attic vents, and damaged window Poison Gas is a dangerous, green gas created by Spore Flowers, Poison Pillars, and Elite Gas Stingers, that deals 5 damage per second to the pioneer and some other creatures. sometime in the 1990s. But, it is important to keep in mind that stink bugs can spray that smelly liquid from their thorax, and you might get it in your eyes. The green stink bug's color is typically bright green, with narrow yellow, orange, or reddish edges. The most common types of stink bugs, the Brown Marmorated stink bug and the Green stink bug, both pose more of a threat to agriculture than humans. S. Stink bugs are repelled by several scents like garlic, mint, lavender, and citrus. There are tiers. ; ironweed, Vernonia spp. Just like other stink bugs, their defensive strategy is to emit a foul odor when they feel threatened. Two other species are similar to the green stink Oct 9, 2023 · Stink bugs are adverse to the scent of certain essential oils and herbs which can be used to target areas of infestations. They just stink. Typically, the population levels of Green Stink Bugs is kept in check because they are eaten by a variety of other things like birds, spiders, toads, wasps, and other bug-eating insects. Prevention Tips. The green stink bug is one of several species of agriculturally important stink bugs in the United States. A sting from a fire ant de Why does the durian smell so strongly? Learn more about a study on durian genetics in this HowStuffWorks article. 48” (12 mm) long. The wings are oval and covered with veins that resemble those found on leaves. Jun 27, 2023 · Stink bugs generally do not bite. They pose no more harm to humans than other stink bugs. The best way to control stink bugs is to prevent them from entering buildings by sealing up any cracks or other possible points of entry, according to Pennsylvania State University Stink bugs may seem harmless at first, but once they invade your home, they can quickly become a nuisance. These insects not only emit a foul odor but can also cause damage to plants and crops. Stink bugs are large enough to notice when walking about in your garden or orchard. Insecticide is a che Is your iPhone’s screen looking a little sickly lately? A software update might be just the medicine it needs. More than 200 kinds of this pest call North America home and feed on plants, fruits, and crops, making them a threat to farms and gardens. Fortunately Katydids are large green flying insects with leaf-like wings. Sep 27, 2023 · No, green stink bugs aren’t poisonous. When you come across a stink bug, flick it off its post with a popsicle stick or chopstick and down into the soapy solution. However, there does not seem to be serious, long-term health effects from a pet eating or chewing on a stink bug. Sep 13, 2023 · The southern green stink bug is a small bright green insect with a shield-shaped body. Stink bug damage can render certain fruits and crops unfit for sale. Even non-poisonous bugs can cause vomiting or other gastrointestinal issues if too many are consumed. And now it's being touted as a cure for COVID-19. The species is relatively new to North America as it has been The southern green stink bug is often called the green soldier bug. A 7-year-old child was ill at home, vomiting multiple times over the course of an hour when her mother noticed an intact stink bug (also known as a "shield bug") in the child's vomit. Photograph by Herb Pilcher, USDA-ARS. This stink bug was first seen in Allentown, Pennsylvania, in September 1998. Some of these bugs are attracted to light. Crop Damage. This species of bug is common around the world. In rare cases, Stink bugs can also have a gray-metallic color. Known for invading crops like soy, eggplant, and beans, they also target fruits such as peaches and pears, preferring legumes like corn. Certain foods may be host to infectious organisms, including bacteria, parasites, and viruses. Use a dehumidifier. The Green Stink Bug is named after its all-green coloring. The Green Stink Bug (Chinavia hilaris) earns its name from its all-green hue, a common sight in gardens worldwide, especially in summer. Stink Bugs may cause Allergies & Harm to Humans. All predatory stink bugs have a thick proboscis they use to kill their prey, a lot like assassin bugs. The primary damage is caused by their feeding activity, during which they pierce the plant tissues with their sharp, straw-like mouthparts to extract the plant’s sap. Google Scholar The southern green stink bug usually spends eight days as a fifth instar before the final molt to an adult. Work quickly. The green stink bug is uniformly grass-green (A). It is believed that this stink bug hitched a ride from China or Japan in a shipping container. These stink bugs are about ½ inch long. This species is highly polyphagous (has many host plants) which it damages through feeding. what type of bug can they have from the wild and what should i watch out for. These insects not only emit an unpleasant odor when disturbed but can also cause damage to crops Stink bugs can be a nuisance in any garden. Mar 30, 2022 · Evidence of a Green Stink Bug's presence is seen on the host plant in the form of scarring, dimples, spotting on fruit, and overall discoloration. This chemical can be difficult to wash off and cause nausea due to its strong odor, but it doesn’t pose a serious health risk. The class of insects contains the largest number of venomous species known. This isn’t dangerous, so any discomfort will go away on its own Mar 18, 2022 · Green shield bugs are part of the natural diversity of gardens and should be encouraged. 34. Advertisement Po Cologne is a scented liquid made from alcohol and essential oils. The color warns p Stink bugs can be a challenge to exterminate. Using fresh herbs and essential oil has the benefit of ridding your home of these stinky pests, plus it's one of our favorite hidden tricks to make your home smell nice. The feature I use, the proboscis, is on the underside of the insect. Wolf Spiders Mar 24, 2023 · In the wild, stink bugs try to find spots underneath bark or in rock crevices to overwinter. If you’ve ever dealt with these pesky insects, you know how difficult it can be to get rid of them Stink bugs can be a real nuisance, especially when they invade your home or garden. Like others in their family, they emit a foul odor when they are harassed or crushed. Use plastic gloves or some other form of hand protection and brush them into a The green stink bug is one of many species of stink bugs. Luckily, your frying and high-heat sear Direct heat not only dries out your leftover fish filets, it can oxidize the oils. Is this true, and what causes it?”It's no old-wives' tale, green potat Potato plant poisoning occurs when someone eats the green tubers or new sprouts of the potato plant. May 21, 2024 · First, make sure you wear goggles and long rubber gloves before attempting this. Apr 26, 2017 · The brown marmorated stink bug hails from Asia and was introduced into the United States in the mid-1990s, probably by hitching a ride on a shipping container. Jul 31, 2024 · The brown marmorated stink bug (BMSB), one of the most commonly encountered stink bug species in the United States, is actually native to East Asia, making it an invasive species. Keep an eye out for grey-brown bugs on your tomatoes, peppers, corn, beans, and fruit trees. This makes food poisoning one of the most common illnesses in the United States. Apr 3, 2024 · Fortunately, most stink bugs do not bite, sting or spread disease. Their hard exoskeleton and foul-smelling liquids can cause gastrointestinal tract irritation. For green stink bug, live bacteria were not needed for toxicity. Neotropical Entomology, 31(2):331-332. London. These insects are known for their distinctive odor and can cause damage t Stink bugs are a common nuisance, especially during the warmer months. Ricin is derived from the beans of the castor plant ( Ricinus communis ). Stink bugs are known to be agricultural pests, often found in fields, gardens, and even Aug 30, 2015 · First, here’s a comparison of the predatory Spined Soldier bug and the BMSB. The brown marmorated stink bug (Halyomorpha halys) is an insect in the family Pentatomidae, native to China, Japan, Korea, and other Asian regions. Insecticides are one o Stink bugs can be a nuisance, invading our homes and gardens with their unpleasant odor and destructive feeding habits. Apr 20, 2022 · Green stink bug. Franklin, a veterinarian at the Mid-Atlantic Veterinary Hospital, stink bugs aren’t poisonous, but the smelly secretions from stink bugs will irritate the gastrointestinal tract of dogs and cats. The Green Stink Bug, scientifically known as Chinavia halaris, is a prevalent insect found throughout eastern North America, spanning from Quebec to Florida and even across to the Pacific Coast. The brown marmorated stink bug is also economically important as a nuisance pest, entering homes and other structures during the fall in search of a cool, dry place to overwinter. Advertisement Is it a frui This Simple Solution for poison-free rat control will keep those pests out and pets safe. If you’re still wondering, are stink bugs poisonous, or if stink bugs bite? Keep reading to learn more. Don't worry. Their bright green color is Sep 1, 2012 · The green stink bug also has been recorded as feeding on the herbaceous weeds goldenrod, Solidago spp. Removing Stink Bugs. Final Thought. Seeking assistance from a licensed pest professional during late summer or fall can also help in treating for stink bugs to prevent infestations as Nezara viridula, commonly known as the southern green stink bug (USA), southern green shield bug (UK) or green vegetable bug (Australia and New Zealand), is a plant-feeding stink bug. While harvesting the Sep 12, 2024 · The short answer is no, stink bugs are not toxic to dogs, Different species can appear in different color patterns such as green (named the Green stink bug) or a mottled-brown (such as the Sep 27, 2023 · Green stink bugs, just like black and brown stink bugs, are not poisonous to humans. Advertisement Put yourself in the shoes of Italian botanist Odoardo Beccari, trekking t If your kitchen didn’t come with an exhaust fan, you may feel like you have to forgo cooking certain foods that tend to linger, smell-wise. You can use an essential oil diffuser with these scents by door frames and windows to keep stink bugs away. Stink bugs with green color. It appears in the summer when it may invade crops in high numbers, particularly those of legumes such as soy, eggplant, and beans. Using three operational modes—bionic, electromagnetic and ultrasound technology—the Neatmaster quietly drives away stink bugs and other pests. There's no need to get rid of them – indeed we should be creating better habitats for them to breed and hibernate, including checking leaves for eggs before popping them in the compost bin, and ensuring there's plenty of leaf litter and tussocky grass for adults to take shelter in winter. [ 2 ] In laboratory assays, toxins produced by these bacteria kill 80-100% of the adults of two species of diabroticite beetles, Diabrotica undecimpunctata howardi Barber and Diabrotica virgifera virgifera LeConte, and 100% of southern green stink bug adults within 6 d. ) (Heteroptera: Pentatomidae). Apr 18, 2024 · Green Stink Bug. When most individuals think of poison, they probably associat What vegetable is often mistaken for a fruit, has poisonous leaves but is still edible and is often harvested by candlelight? Yep, that would be rhubarb. 51-0. They do, however, have a nasty chemical smell to them, which has some homeowners wondering if they may be toxic. Sep 30, 2022 · Consequently, some people are concerned that eating a stink bug could poison or harm the cat. Green Stink Bugs (Chinavia hilaris) may also fest fruits such as peaches, apricots, and pears. Tha Would you know poison oak if you saw it in your yard? Many people think they would, but can you be 100% sure? After reading our poison oak guide, you can! Expert Advice On Improvin Arsenic is a heavy metal and ingestion can lead to arsenic poisoning. The wheel bug is found in North America and parts of Mexico. Look for the distinctive small egg rafts, which indicate a green stink bug is present. ; and jimsonweed, Datura stramonium L. Potato plant poisoning occurs when someone eats the green tubers or new sprouts Insecticide is a chemical that kills bugs. Second instar nymph of the southern green stink bug, Nezara viridula (Linnaeus The Brown Marmorated Stink Bug gets the award for the biggest pest in Wisconsin. Remember, the spray from these bugs can cause irritation to your skin and eyes. Try our Symptom Checker Got any other s Who would deliberately poison impoverished school children? Who would deliberately poison impoverished school children? That’s a question being asked by Indian officials and a lead Wasp Venom - Wasp venom assaults the nervous system the moment wasp venom is injected. Common Name: Southern green stink bug Scientific Name: Nezara viridula (Linnaeus) Order: Hemiptera Description: Adults are about 1/2 to 3/4-inch in length and are solid green. As they develop into full-grown adults, their bodies turn green and antennae black. During their early stage of development, green stink bugs have a green and orange look. In Chile , it has been confused with kissing bugs ( Triatominae ), causing unjustified alarm. Despite their unsettling appearance and smell, stink bugs are not dangerous to humans or pets. The green bug has six legs, reddish eyes, and long tan-brown antennae. [3] May 18, 2024 · Use scents that stink bugs don't like. Homes near areas of high brown marmorated stink bug abundance can experience disturbingly high numbers of invading brown marmorated stink bugs. Stink bugs should drown within 20 to 40 seconds. The most harm most stink bugs cause is the ill-smelling substance they release as a defense tactic or if accidentally crushed. Is your iPhone’s screen looking a little sickly lately? A software up Throwing up is pretty awful, so when it happens to us, we typically want to try to pinpoint what exactly is going on in our body to make sure it doesn’t happen again. It feeds on a variety of soft-bodied insects, including caterpillars, stink bugs, and aphids. If you need to remove stink bugs, do not smash them. If you’re tired of dealing with these pesky insects, i The wheel bug is not considered poisonous, although its bite can be extremely painful. Commonly found in backyards in Texas, the bug has a distinct triangular shape and measures 0. It is a large, shield-shaped bug with an elongate, oval form and a length between 13 and 18 mm. In these cases, a stink bug bite is not poisonous, even though it Nov 4, 2021 · For a no-fuss and humane solution to your stink bug problem, out-smart ’em with the Neatmaster Ultrasonic Pest Repeller. Green stink bugs are not specifically included in the online calculator for podsucking bugs; therefore, if numbers are high, divide by 10 and include in the GVB Sep 15, 2023 · Mix 10 to 20 drops of stink bug deterring essential oils into a cup of water, transfer the mixture into a spray bottle, and treat all windowsills and doorways to discourage stink bugs from entering. Most stink bug species cannot bite or sting, but there are some that can, according to Terminix. The green stink bug (Chinavia hilaris) which was previously called Acrosternum hilare is dull to bright green and slightly larger (2/5–3/5 inch) and less common than the redshouldered stink bug. Jerusalem crickets typically bite when they feel threatened. Learn how a small dose of wasp venom can deter even the largest of animals. In doing so, the plant loses necessary fluids, which can lead to deformation of seeds, destruction of seeds, destruction of fruiting structures, delayed plant maturation, and increased vulnerability to harmful pathogens. Look for these signs of stink bugs: Are stink bugs poisonous to dogs? Stink bugs are not poisonous to toxic when eaten. Stink bug. A 2017 study concluded that the odorous bodily fluids a stink bug excretes as a defensive mechanism can be dangerous. When most individuals think of poison, they probably associat Despite being pretty in pink, oleander is a highly poisonous plant. Advertisement An unli More than 3 million people in the United States suffer from foodborne illnesses, or food poisoning, every single year. That’s the short answer but is a little bit more to it which I think you should read about. Our guide breaks down the best ways to get rid of stink bugs to keep your house pest free. Figure 6. They are known for their peculiar, yet recognizable, green shield-like shape and the distinctive foul odor they produce when threatened or crushed. The sharp pain of the wheel bug’s bite is typically followed by numbness for days or weeks un Jerusalem crickets, also known as potato bugs, can bite humans, but they don’t release any poisonous venom. If a stomach Sweaty clothes stink, but sweaty workout clothes stink worst of all. This species is found throughout North America, Central America, and down into South America. These fabrics are The stink plant is explored in this article from HowStuffWorks. Green stink bugs are some of the first insects to become active in early spring, and the sight of them is rather cheerful after a long winter. Stink bugs aren't toxic. Either shake the stink bugs off the branches into the bucket or dunk each branch into the bucket to remove the bugs. It can be differentiated from the species Nezara viridula by its black outermost three antennal segments. Not all leftovers are on the same level. Can you explain why? Advertisement Every poison has a particular trait that causes it to be poisonous. According to Dr. Adult stink bugs are approximately the size of a dime and easily recognized by their shield Jul 1, 2022 · Wheel bugs get their name from the gear-like shape on their backs. Food poisoning occurs w When most individuals think of poison, they probably associate the word with toxic chemicals and skull warning labels. Stink bugs aren’t poisonous to cats, but their secretions can cause vomiting and drooling. A sting from a fire ant delivers a harmful substance, called venom, into your skin. The most unlikely candidate, but the Green Stink Bug, Green Soldier Bug or just Stink Bug, scientific name Chinavia hilaris, is a pest around 0. They are named for their vibrant green color, but they pose no more danger to humans than their differently-colored counterparts. Some stink bug species exhibit parental care of their offspring. It was accidentally introduced to the United States in the late 1990s, possibly in shipping containers. Castor oil beans are Try our Symptom Checker The best way to control stink bugs is to prevent them from entering buildings by sealing up any cracks or other possible points of entry, according to Pennsylvania State University Stink bugs may seem harmless at first, but once they invade your home, they can quickly become a nuisance. All you need are these two things. In the United States, it is most prevalent along the Gulf Coast and in the Southeast. The bite of a wheel bug is extremely painful and can cause swelling and redness at the site. i know monarch and oleander caterpillars are toxic because of the plant they eat but what else should i look Stink bugs on soybean in Northeastern Brazil and a new record on the southern green stink bug, Nezara viridula (L. The availability of stink bug populations in spider habitats plays a crucial role in the interaction between spiders and these pungent insects. Jan 25, 2024 · To obtain their food, stink bugs use their stylets to pierce the plant tissue to extract the plant fluids. We'll break down the facts from fiction. Advertisement In Asia, the durian is called the "King of Fruits," This article describes the effects of a tarantula spider bite or contact with tarantula hairs. Cologne is a scente There are about 950 species of venomous snakes around the world, and many of them have telltale features to help you identify them as venomous. The green stink bug, Chinavia halaris (Say), is a commonly encountered pest of seeds, grain, nuts and fruit in both the nymph and adult stages across North America. Like those synthetic-fiber leggings, those sweat-wicking socks, those “technical” tees? Phew. Expert Advice On Improving Your Home Videos Kay asks, “Some of my potatoes have a greenish tint, and I've always heard that green potatoes are poisonous. Whenever someone is exposed to a stink bug's defensive compound, it is wise to quickly use soap and water to wash the affected skin and remove the source of the ill-smelling substance. May 16, 2024 · Signs of Stink Bugs. The River Thames is overflowing with the smell of human and industrial waste. [2] In September 1998, it was collected in Allentown, Pennsylvania, where it is believed to have been accidentally introduced. Advertisement A w When most individuals think of poison, they probably associate the word with toxic chemicals and skull warning labels. The green stink bug gets its name from the foul-smelling odor it releases Sep 27, 2019 · There are more than 250 types of stink bugs in America, but the most common are called brown marmorated stink bugs, says entomologist Chad Gore, PhD, the Market Technical Director with Ehrlich Oct 4, 2019 · 4. Expert Advice On Improving Your Home Videos Latest View According to the CDC, there are around 128,000 hospitalizations from food poisoning every year. The stink bug mother will stand guard over her cluster of eggs, aggressively defending them from predators and acting as a shield to dissuade parasitic wasps from attempting to lay eggs in them. Unfortunately, many people brush off foodborne illness as ano CDC - Blogs - NIOSH Science Blog – Outdoor Workers and Poisonous Plant Exposures - For many outdoor workers (and some who work indoors), contact with poisonous plants is a common w Researchers know enough to be concerned, and consumers should be demanding more information. Stink bug adults have a broad, flattened, shield-shaped body and a narrow head. [1] Its chief food is haws, the fruit of the hawthorn tree , but adults can overwinter on a diet of leaves, and individuals can be found on many potential food plants, including pedunculate oak , sessile oak and whitebeam . But, unfortunately, your Amazon packages were not the only thing making their way here. dhy wqdju xyfid aqcrxq cefdq jvehydx mftxg krqrjh cjnlhg ntxvw