Preview

Malathion an Organ Osphate Insecticide

Satisfactory Essays
Open Document
Open Document
886 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Malathion an Organ Osphate Insecticide
Week Two
Debra Howard
SCI/275
Assignment: Risk Assessment
Due Date: 02/12/2011
Instructor: Dr. Jensen

Malathion is an organophosphate insecticide; it is used to control certain insect population like boll weevil, med fly ,and mosquitoes. Applications of malathion has been used on the ground or sprayed in the air when trying to get rid on adult mosquitoes associated with West Nile Virus. (ATSDR 2001). When using malathion by ground or spraying the EPA says it has a relatively low toxicity to humans, other mammals and birds when comparing the chemical to other organophosphate insecticides.(EPA2000 ab) However because of the danger it imposes on aquatic organisms direct application to bodies of water is avoided. There are four important factors one should take inconsideration before using malathion as a solution to the mosquitoes’ and West Nile Virus problem. Hazard identification: The chemical Malathion does have negative side effects for humans and eco system. Dose-response: Depending on the amount of Malathion ingested the symptoms can vary from mild to moderate or severe poisoning, results can be life threatening. Exposure: Water pH level over 5 percent causes negative effects to aquatic animals, and plants.
Malathion degrades rapidly in the environment when used by spraying or ground applications.
Risk characterization: The ATSDR has developed several risk levels concerning the gestation of malathion. Testing done on humans and animals with an uncertainty factor used, to determine what level of contamination is a risk.
Using these proposed values for the risk assessments for public health mosquito uses, EPA
(2000d) concluded that the risk estimates for adults and toddlers for combined dermal and
Inhalation exposure did not exceed EPA’s levels of concern for residential bystander inhalation and dermal exposure from truck fogger and aerial ULV mosquito-control applications. This assessment included



References: http://www.atsdr.cdc.gov/consultations/west_nile_virus/malathion.html

You May Also Find These Documents Helpful

  • Good Essays

    Sci-275 Week 2 Assignment

    • 772 Words
    • 4 Pages

    Malathion has been introduced to our City Council here in Wilhelmville. We as a community are looking for a pesticide to kill these insects destroying our crops, however in reviewing information found and presented to us and our council we have a split decision. Below is what we have been presented with by concerned citizens of the community. When presenting this information to the members of the council will assist me and others in our decision whether this is the pesticide that we need to use here in our community.…

    • 772 Words
    • 4 Pages
    Good Essays
  • Powerful Essays

    pH is a measurement of how acidic or basic a solution is. Water with pH lower than 7 is considered acidic and higher than 7 is known as basic. The safe levels of pH in drinking water is 6.5 - 8.5. Pure water has a pH of 7 which means there is an equilibrium of positive hydrogen ions and negative hydroxide ions. ((When the pH of water is below 6.5, the water is soft and corrosive. This type of water can damage metal pipes and when used, it can stain clothes, have a sour taste and damage sinks. Water with a Ph greater than 8.5 is considered hard. This water does not pose a health risk, but can stain dishes and utensils))4. When Ph of water is low there can be many consequences and effects. ((Even a moderate decrease in pH of water could affect the fish…

    • 1741 Words
    • 11 Pages
    Powerful Essays
  • Good Essays

    If the range is high, the pH is 8.5-14. This means the water quality is poor and the ecosystem is unhealthy. The ecosystem is also unhealthy if the range is 1-6.5, which is considered low. The best range for the pH to be is 6.5-8.5, which is good quality water and healthy. If water quality is abundantly alkaline, then it will contain too much acid, but you don’t want the water to be too basic either.…

    • 1410 Words
    • 6 Pages
    Good Essays
  • Satisfactory Essays

    pH chemicals into the water instead of having it drop to a pH of five it dropped to…

    • 431 Words
    • 1 Page
    Satisfactory Essays
  • Good Essays

    Carson says that toxins in water can persist through purifying plants, and in one instance were in two streams that supplied humans with water. Also, one dangerous aspect of runoff is how widespread it is. Rain falls on crops sprayed with harmful chemicals and can spread to streams, wells, and even groundwater, which threatens all water on the planet. When water is compromised, it hurts all life, because all life depends on water or a chain of other living things that rely on water.…

    • 988 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Genericville is currently faced with a decision that is being addressed by countless communities each year. How do we balance the problem with mosquitoes and their illnesses like West Nile Virus, with environmental problems caused by the use of a pesticide like Malathion? A risk assessment is then ordered because it helps estimate the probability that an event will occur and lets us set priorities and manage risks in an appropriate way.…

    • 812 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Summary Too many house-flies are coming into people’s homes during the summer when they have their doors and windows open. This is a problem for the people living in these homes as house-flies carry diseases that they transmit onto food around the home. We need to come up with a solution that decreases the number of house-flies coming into the home while allowing people to keep their doors open. After considering numerous ideas I concluded that the best way to do this is via a eugenol based fly spray.…

    • 977 Words
    • 4 Pages
    Good Essays
  • Good Essays

    The introduction of the West Nile virus in Canada is changing the way we look at mosquitoes. Which repellent is most effective?…

    • 661 Words
    • 3 Pages
    Good Essays
  • Good Essays

    Pesticide Penetration

    • 687 Words
    • 3 Pages

    The state of the chemical, i.e., solid, liquid, or gas, affects the chances of pesticide penetration into the body. Liquids or gasses can get into the body through all three routes, whereas solids tend to have a lower chance of entry through the lungs. However, if solid particles are small enough or if they remain on the skin long enough, penetration into the body can take place in the same ways to those of liquids or gasses. The most common route by which pesticide users are poisoned is absorption through the skin. Dermal absorption may occur as a result of splashes and spills when mixing, loading or disposing of pesticides. To a minor degree, it may result from exposure to large amounts of residue. The degree of hazard by dermal absorption…

    • 687 Words
    • 3 Pages
    Good Essays
  • Satisfactory Essays

    bio lab

    • 358 Words
    • 2 Pages

    Acid precipitation affects the ecosystem, for example, lowering ph in water when it falls into the lake which kills some aquatic organisms.…

    • 358 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    Risk Assessment Paper

    • 766 Words
    • 4 Pages

    The use of pesticides is an important decision that thousands of communities face each year. Nobody likes dealing with mosquitos and the diseases they bring so using chemicals and pesticides is an option but with other consequences. Mosquitos carry West Nile Virus that affects the city of Genericville every year with 50 cases projected this year in the city and two fatalities as well. On the other hand, the chemicals proposed for controlling the mosquito population has its own risks. The pesticide Malathion is also dangerous to people if they come in contact with it before it degrades. The potential for citizens of the city being exposed is almost a certainty with many short and long-term risks being unknown. In this risk assessment I will weigh the consequences of each approach being the use of Malathion on the mosquitos and wetlands or not and battle the mosquitos and West Nile Virus. This assessment will include Hazard identification, dose-response, exposure, and risk characterization.…

    • 766 Words
    • 4 Pages
    Good Essays
  • Good Essays

    West Nile Virus (WNV)

    • 634 Words
    • 3 Pages

    West Nile virus (WNV) is a dangerous nervous system disease that spreads primarily by mosquitoes (2007). According to data from the Center for Disease Control and Prevention (2007), there were 4,269 West Nile Virus cases in the United States in 2006 and 177 were fatalities. The West Nile Virus does not discriminate from the rich, the poor or the uneducated. By administering the application of harmless pesticides we can not only cut down the death rate, but we can also provide a safer environment.…

    • 634 Words
    • 3 Pages
    Good Essays
  • Satisfactory Essays

    Acidity In Vernal Pool

    • 150 Words
    • 1 Page

    This lab is being conducted to find the level of acidity in vernal pools and the lake water that feeds them. We want to see which type of water has a higher level of acidity in it. The PH of water determines the solubility and biological availability of chemical constituents such as nutrients and heavy metals. Acidity affects aquatic life because if the PH approach 5, non-desirable species of plankton and mosses may begin to invade, and populations of fish such as smallmouth bass disappear. Below a PH of 5, populations begin to disappear and below a PH of 4.5, the water is essentially devoid of fish.…

    • 150 Words
    • 1 Page
    Satisfactory Essays
  • Best Essays

    Rachel Carson

    • 2901 Words
    • 12 Pages

    These chemicals are now universally used on almost every farm and in almost every home across this country. They are “nonselective chemicals that have the power to kill every insect, the 'good ' and the 'bad, ' to still the song of birds and the leaping of fish in the streams, to coat the leaves with a deadly film, and to linger on in the soil.” Sadly enough, the destination of these insecticides are usually only a few annoying bugs among the thousands that exist (Carson par. 7).…

    • 2901 Words
    • 12 Pages
    Best Essays
  • Good Essays

    Acid rain has many ecological effects, but none is greater than its impact on lakes, streams, wetlands, and other aquatic environments. Acid rain makes waters acidic and causes them to absorb the aluminum that makes its way from soil into lakes and streams. This combination makes waters toxic to crayfish, clams, fish, and other aquatic…

    • 753 Words
    • 4 Pages
    Good Essays