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General Vookly

Público·13 miembros
Bulat Tretyakov
Bulat Tretyakov

A Costa Do Mosquito


PLEASE NOTE: In-person fish pick up is not available. Contra Costa County residents may request mosquitofish from the District online or by calling 925-685-9301. Upon receiving your request for mosquitofish, a District employee will follow up with you and make an appointment for an inspection. During the inspection, the District employee will determine if the water feature is an appropriate location for the fish. If the location is appropriate for mosquitofish, the District employee will place fish in the water feature. If, for example, the water feature is found to be producing more mosquito larvae than the fish can initially handle, the District employee will provide assistance and advice on the appropriate action to mitigate the mosquito issue.Mosquitofish may be used in ornamental ponds, horse troughs, stock ponds and other artificial water bodies and may not be placed by the public in creeks or natural water sources.




A Costa do Mosquito


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Zika Virus: Questions AnsweredZika virus is transmitted by Aedes aegypti mosquitoes (also known as yellow fever mosquitoes) and by Aedes albopictus mosquitoes (also known as Asian tiger mosquitoes). These mosquitoes are not native to California. However, since 2011 they have been detected in several California counties. READ MORE.


Adult mosquito control (spraying) to control adult mosquitoes only occurs after surveillance and testing indicate either the presence of West Nile virus in an area, or if the number of mosquitoes exceeds the public health threshold. The majority of our mosquito control is completed when the mosquitoes are in the water in their larval form. We spray for adult mosquitoes when our surveillance data meets the criteria to perform this action. We encourage residents to sign up and receive free email notifications that include adult mosquito control schedules, interactive maps, product information, and more.


Contra Costa County is home to twenty three species of mosquitoes. There are also several types of insects located throughout the county that many people perceive as a mosquito, but actually are different species of insects. READ MORE.


Mosquitoes have four life stages; egg, larva, pupa, and adult. The first three stages require standing water for their development. The female mosquito lays her eggs either individually or in clusters, which is called an egg raft. READ MORE.


Mosquitoes need very little water to lay eggs and produce hundreds, thousands, even millions of mosquitoes. Adult mosquitoes can acquire diseases such as West Nile virus, which is present in Contra Costa County. Dump out standing water and prevent mosquito production. READ MORE.


Some species of mosquitoese are involved in the transmission of important disease-causing agents (pathogens). In Califonria, these diseases include encephalitis viruses, malaria, and dog heartworm. READ MORE.


The goal of our surveillance program is to prevent mosquito problems before they happen. We monitor mosquito populations throughout the county by regularly inspecting all bodies of water known to harbor mosquito larvae. READ MORE.


Our mosquito control program is based on the principle of Integrated Vector Management (IVM). It is most effective to control the larval stages since they are concentrated in a smaller area and cannot fly away. READ MORE.


West Nile virus is a viral disease of birds that is transmitted from bird to bird by way of a mosquito bite. It can occasionally cause meningoencephalitis (inflammation of the brain and spinal cord). READ MORE.


It is generally agreed by mosquito control experts that controlling larval mosquitoes while they are still restricted to their aquatic habitat is the most effective way to reduce adult mosquito populations and therefore reduce the risk of disease. READ MORE.


A local species, the Western tree hole mosquito (pictured left), is similar in size and also bites during the day, but it lacks the white strip on the back and is more drab in coloration, can be mistaken for the Asian tiger mosquito. This species is usually prominent in areas with older trees, and is active from April through July. Western tree hole mosquitoes are capable of transmitting dog heartworm disease (to canines, not humans). Where do Asian tiger mosquitoes breed?The Asian tiger mosquito is known as a "container breeder" because it deposits its eggs in small containers rather than the larger areas used by most mosquito species. The eggs of the Asian tiger mosquito are glued to the sides of containers just above the water line, and hatch when the water level rises. The mosquito develops from larva to adult in about seven days. In southern California, experience indicates that they thrive in humid microclimates, such as dense collections of potted plants that are frequently watered.


Like most countries in Central and South America, Costa Rica has various mosquito-borne illnesses. Dengue is the most common. Chikungunya and Zika are less prevalent but still something to be aware of. For more information about these diseases, read our post Costa Rica and Mosquitoes: Tips to Prevent Zika, Dengue, and More.


Repellents like DEET and picardin are effective against mosquito bites. (See our Mosquitoes post for our recommendations for repellents). But covering your skin is a great, simple way to prevent bites too. The type of clothing really matters, though, since mosquitoes can bite through many fabrics. Here are some guidelines:


Following these guidelines as described is not always practical, of course, since temperatures often get into the 80s or higher in Costa Rica. If it is very hot out, use your best judgment. The type of mosquito that transmits many of the viruses, the Aedes, bites feet and legs most often, so closed shoes and pants will go a long way towards protecting yourself. When hiking, we often wear pants and boots and a sleeveless shirt or T-shirt with repellent on top. In the rainy season, when the mosquitoes are the worst, temperatures do cool down considerably so that you can often wear a long sleeve top and pants.


Permethrin works in a unique way. Unlike DEET and picardin, which prevent mosquitoes from landing on you in the first place, permethrin works by killing or incapacitating mosquitoes once they land. So they do land on you, but are then killed by the chemical when they touch your clothing.


There is no 100% effective solution against mosquito bites, but wearing the right clothing can help a lot. We hope that this article gave you some ideas for the best mosquito-protection clothing in Costa Rica.


Costa Rica is near the equator which means that some destinations have mosquitoes (also known as zancudos in Spanish) throughout most of the year. It is likely that you encounter them on the coasts, especially in the Caribbean region of Costa Rica. However, mosquitoes are rare in other parts of the country due to low temperatures in the night. You will probably not see many of them in the Central Valley, Monteverde or other places in the Highlands of Costa Rica.


DEET may be advertised as the more effective preventative product against mosquitoes, but it does have its downsides. The heavy ingredients used in DEET products can, after frequent use, cause skin irritations and even neurological effects. If you will be traveling for a longer period of time and need to use bug spray on a frequent bases, consider more natural alternatives to keep yourself safe.


If you are concerned you can easily take precautions. When you are in areas with mosquito populations you can wear long sleeves and pants in combination with insect repellent. Below are some highlights from an article found in the New York Times about the Zika Virus which was very informative. The biggest concern is for women who are pregnant. For the common traveler they offer the following information:


There has been a lot of recent information about the Zika Virus in the news. We are very fortunate that this has not been much of an issue here in Costa Rica. However, there are some precautions you can take. Mosquitoes in Costa Rica that carry the virus tend to be prevalent in undeveloped areas and need wet conditions. During this time of year, the dry season, many regions in Costa Rica do not have a mosquito population to be concerned about.


Another risk in Costa Rica is the Chikungunya transmission, caused by the bite of the female mosquito infected with the CHIK virus. The risk is higher during the wet season and the mosquito has been known to bite usually in the mornings or afternoon in turban and suburban areas. Sometimes Chikungunya is asymptomatic. Symptoms usually show 3-12 days after being bitten by an infected mosquito. Symptoms can include a sudden fever and muscle and joint pains as well as headaches, fatigue, vomiting and nausea. Most people recover fully but the joint pains can last for several weeks or months after the bite.


In situations where high numbers of adult mosquitoes are already present, especially when virus-positive birds or mosquitoes have been found in the area, there is a high immediate risk of disease transmission to people. The only way to reduce the immediate risk is to reduce the adult mosquito population by fogging. A very fine mist of pyrethrin (a plant-derived insecticide) is sprayed from trucks, generally in the evening when mosquitoes are the most active. The amount of pyrethrin used is very small (around 1 ounce per acre), but since mosquitoes are so small it only takes a single droplet to kill one. Because the amount of material used is so small, there is very little risk of causing harm to people, pets or the environment. Knocking down the adult mosquito population reduces the immediate risk while our crews locate and treat the larval habitats to prevent future problems.


In the best of all possible worlds we would always be able to control mosquitoes in the larval stage, which would reduce the need for adulticiding. This is an area where we can really use everyone's help. By eliminating sources of standing water on your property, reporting green swimming pools and calling us to report mosquito problems you can help to reduce disease risk for yourself and your neighbors and make our job a lot easier and more efficient! Analysis of our daily work record database shows that in 2008 our mosquito control inspectors, technicians and aides spent 95 person-hours adulticiding vs. 2,540 person-hours larviciding and 6,335 person-hours inspecting. Therefore, approximately 1 percent of their time was spent adulticiding, relative to the sum of these other activities. 041b061a72


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