New mosquito traps offer nontoxic alternatives in Zika fight.

Canadian and Mexican researchers have developed a novel, low-cost and effective method for capturing and destroying Aedes spp. mosquito eggs by using traps made from used tires. This new solution to mosquito control, which does not use pesticides or noxious chemicals, may have implications for the prevention of vector-borne diseases like dengue and Zika. Gérardo Ulíbarri, PhD, associate professor of chemistry and biochemistry at Laurentian University, Ontario, said in a press release that they decided to use recycled tires because tires already represent up to 29% of the breeding sites chosen by the Aedes aegypti mosquitoes, partly because tires are a universally affordable instrument in low-resource settings, and partly because giving old tires a new use creates an opportunity to clean up the local environment. Over the course of 10 months in a remote community in Guatemala — where dengue, chikungunya and Zika viruses are endemic — Ulíbarri and colleagues studied the effectiveness of a mosquito egg ovitrap called an “ovillanta.” The device, which is designed to imitate a natural breeding site for mosquitoes and attract egg-laying females, is fashioned from two sections of a used car tire that overlap in the shape of a mouth. According to the researchers, a nontoxic attractant solution is poured into the bottom half of the trap, which has a fluid release valve. Female insects lay their eggs on strips of pellon paper inside the ovillanta, and the eggs are counted to monitor the density of the mosquito population and then destroyed with fire or ethanol. Once emptied, the solution is filtered and used again, building up a higher concentration of a natural pheromone left with each egg that will attract other female mosquitoes to the site. In the study, Ulíbarri and colleagues compared the ovillanta with standard ovitraps made from buckets containing 1 L of clean water. According to the researchers, the contents of standard ovitraps are typically discarded onto the ground instead of being recycled, which can sometimes allow surviving Aedes eggs that did not adhere to the strip to hatch on dry soil up to several months later. Moreover, the need to replace clean water on a regular basis can be challenging in remote areas with limited infrastructure. Eighty-four ovillantas were used in seven neighborhoods in the urban core of Sayaxché, which has a population of approximately 15,000. Results indicated that significantly more mosquito eggs were trapped using the ovillantas as more than 181,000 eggs were destroyed during the 10-month period using the new method, almost seven times as many as control sites. Argentinian researchers from the Centro de Investigaciones de Plagas e Insecticidas (CIPEIN) also have designed a new ovitrap prototype — a cup made of low-density polyethylene infused with the larvicide pyriproxyfen, a WHO-recommended juvenile hormone analog that targets mosquito larvae during the pupal stage of development. Once the cup is filled with water, the larvicide is released from the plastic container, killing the eggs of A. aegypti mosquitoes. The CIPEIN researchers tested the plastic ovitrap on laboratory-raised A. aegypti and found that the device was 100% effective at preventing larvae from developing into adults during a 30-week period, even after the water in the container had been changed once a week. However, the researchers noted that field trials are necessary to test the prototype’s effectiveness to suppress A. aegypti populations. A practical tool for managing dengue vectors, must be a specific trap, effective, inexpensive, simple to construct and operate, and it should not require frequent maintenance. . Traps without toxic pesticides are more likely to be accepted by homeowners because of concerns about potential health and environmental hazards. This prototype in the study meets all these requirements. culled from; healio.com

THE ZIKA THREAT AND THE GLOBAL VILLAGE.

Zika virus is a mosquito-borne illness and it was first isolated from a Rhesus monkey in the Zika forest in Uganda in 1947. It was first identified in humans in 1957 in Uganda and in 1968, researchers found the virus in people in Nigeria and between 1951 and 1981,the virus found in people in Uganda,Tanzania,egypt,Sierra leone,Gabon e.t.c .The first outbreak outside of Africa, Asia and the Pacific Islands only occurred in May 2015, when a case was reported in Brazil. Since then the disease has spread to 18 other countries in south and central America and the Caribbean. The symptoms of Zika include joint pain and a rash – scientists believe it is linked to microcephaly, or abnormally small brains, in newborns. As a result, authorities in Brazil, Colombia and El Salvador have advised women against becoming pregnant during the outbreak. Three travellers who returned to the UK from South and Central America have been diagnosed with the Zika virus, a mosquito-borne illness that has been linked to brain deformities in babies. The three people had presented with the virus after travelling to Colombia, Suriname and Guyana, all countries which are experiencing Zika outbreaks. Zika does not occur naturally in the UK ,but it can be transmitted only from the bite of a mosquito or, in rare cases through sexual transmission or by transmission from mother to foetus via the placenta.It does not spread directly from person to person. Mosquitoes transmitting the zika virus was only identified in tropical regions but recent research has shown adaptability to colder regions making it easy for spread of the infection.The Aedes aegypti is a day time feeder found predominantly in urban areas in close association with man,making humans the primary target.The best way to stop threat is to protect yourself from bites,avoid travelling to places with outbreaks, wear protective clothing in susceptible areas,use insecticides, screened doors/nets and sleep under treated nets. The war against ZIKA VIRUS is total destruction of mosquitoes, (irrespective of species),clean your environment, remove containers of stagnant water and pour kerosene in your drains/gutters .

THE ZIKA VIRUS.

On Monday (Jan. 25), the World Health Organization announced that Zika virus, a mosquito-borne illness that in the past year has swept quickly throughout equatorial countries, is expected to spread across the Americas and into the United States. Zika virus is transmitted by the mosquito species Aedes aegypti, also a carrier of dengue fever and chikungunya, two other tropical diseases. Though Aedes aegypti is not native to North America, researchers at the University of Notre Dame who study the species have reported a discovery of a population of the mosquitoes in a Capitol Hill neighborhood in Washington, D.C. , the team identified genetic evidence that these mosquitoes have overwintered for at least the past four years, meaning they are adapting for persistence in a northern climate well out of their normal range. This mosquito is typically restricted to tropical and subtropical regions of the world and not found farther north in the United States than Alabama, Mississippi, Georgia and South Carolina. What this means for the scientific world," said Severson, who led the team, "is some mosquito species are finding ways to survive in normally restrictive environments by taking advantage of underground refugia. Therefore, a real potential exists for active transmission of mosquito-borne tropical diseases in popular places like the National Mall.(source ;science daily) The emergence of mosquitoes in normally restricted areas has exposed the pandemic potential of the ZIKA VIRUS,with pregnant women at highest risk.Prevention of mosquito bites through use of treated nets,insecticides,and clearing environment of stagnant water,destruction of developmental stages and more recently the introduction of genetically modified mosquitoes to wipe out the infective strains have all been employed to reduce disease incidence. Travelling to zika-risk zones by pregnant women has also been initiated as they are mostly prone to the infection.

Pest free zone.

DISEASE causing pests abound in the environment resulting in the use of pesticides .Pest are categorized and hence method of control is based on our focus . Insects are a nuisance in the environment resulting in disease.They also cause economic losses in homes, offices , feed stores and farm lots. There is a new handy pack of insecticides that help eliminate these pest; its B OLIVE INSECTICIDE.This will eliminate cockroaches,bugs,flies, spiders,wall geckos and other crawling insects. This potent insecticide can be used as a fumigant for offices,warehouses,garages, and stores.