Posted by: Mahdi Ebrahimi | November 18, 2008

Pesticides more dangerous than thought

U.S. scientists studying 10 of the world’s most popular approved pesticides say, when combined, the chemicals caused 99 percent mortality in tadpoles.

University of Pittsburgh researchers said the U.S. Environmental Protection Agency-approved pesticides, when mixed together, can decimate amphibian populations even if the concentration of the individual chemicals is within limits considered safe.

Such “cocktails of contaminants” are frequently detected in nature, the scientists said, noting their findings offer the first illustration of how a large mixture of pesticides can adversely impact the environment.

Associate Professor Rick Relyea, the study’s lead author, exposed gray tree frog and leopard frog tadpoles to small amounts of the 10 pesticides — insecticides carbaryl, chlorpyrifos, diazinon, endosulfan, and malathion, as well as five herbicides: acetochlor, atrazine, glyphosate, metolachlor, and 2,4-D.

He used each of the pesticides alone, the insecticides combined, a mix of the five herbicides, or all 10 of the poisons.

Relyea found a mixture of all 10 chemicals killed 99 percent of leopard frog tadpoles, as did the insecticide-only mixture.

The study is detailed in the online edition of the journal Oecologia.

source: www.upi.com


Responses

  1. ENVIRONMENTAL PROTECTION AGENCY

    40 CFR Part 180

    [EPA-HQ-OPP-2008-0262; FRL-8398-8]

    Spiromesifen; Pesticide Tolerances

    AGENCY: Environmental Protection Agency (EPA).

    ACTION: Final rule.

    SUMMARY: This regulation establishes a tolerance for combined residues of spiromesifen in or on tomato, paste. Bayer CropScience requested these tolerances under the Federal Food, Drug, and Cosmetic Act (FFDCA).

    DATES: This regulation is effective February 25, 2009. Objections and requests for hearings must be received on or before April 27, 2009, and must be filed in accordance with the instructions provided in 40 CFR part 178 (see also Unit I.C. of the SUPPLEMENTARY INFORMATION).

    ADDRESSES: EPA has established a docket for this action under docket identification (ID) number EPA-HQ-OPP-2008-0262. All documents in the docket are listed in the docket index available at http://www.regulations.gov. Although listed in the index, some information is not publicly available, e.g., Confidential Business Information (CBI) or other information whose disclosure is restricted by statute. Certain other material, such as copyrighted material, is not placed on the Internet and will be publicly available only in hard copy form. Publicly available docket materials are available in the electronic docket at http://www.regulations.gov, or, if only available in hard copy, at the OPP Regulatory Public Docket in Rm. S-4400, One Potomac Yard (South Bldg.), 2777 S. Crystal Dr., Arlington, VA. The Docket Facility is open from 8:30 a.m. to 4 p.m., Monday through Friday, excluding legal holidays. The Docket Facility telephone number is (703) 305-5805.

    FOR FURTHER INFORMATION CONTACT: Jennifer Gaines, Registration Division (7505P), Office of Pesticide Programs, Environmental Protection Agency, 1200 Pennsylvania Ave., NW., Washington, DC 20460-0001; telephone number (703) 305-5967; e-mail address: gaines.jennifer@epa.gov.

    I found this at http://www.CyberRegs.com

  2. Interesting info regarding tomato paste and an acceptable level of the pesticide spiromesifen.

    ——————

    ENVIRONMENTAL PROTECTION AGENCY

    February 25, 2009

    40 CFR Part 180

    [EPA-HQ-OPP-2008-0262; FRL-8398-8]

    Spiromesifen; Pesticide Tolerances

    AGENCY: Environmental Protection Agency (EPA).

    ACTION: Final rule.

    SUMMARY: This regulation establishes a tolerance for combined residues of spiromesifen in or on tomato, paste. Bayer CropScience requested these tolerances under the Federal Food, Drug, and Cosmetic Act (FFDCA).

    DATES: This regulation is effective February 25, 2009. Objections and requests for hearings must be received on or before April 27, 2009, and must be filed in accordance with the instructions provided in 40 CFR part 178 (see also Unit I.C. of the SUPPLEMENTARY INFORMATION).

    ADDRESSES: EPA has established a docket for this action under docket identification (ID) number EPA-HQ-OPP-2008-0262. All documents in the docket are listed in the docket index available at http://www.regulations.gov. Although listed in the index, some information is not publicly available, e.g., Confidential Business Information (CBI) or other information whose disclosure is restricted by statute. Certain other material, such as copyrighted material, is not placed on the Internet and will be publicly available only in hard copy form. Publicly available docket materials are available in the electronic docket at http://www.regulations.gov, or, if only available in hard copy, at the OPP Regulatory Public Docket in Rm. S-4400, One Potomac Yard (South Bldg.), 2777 S. Crystal Dr., Arlington, VA. The Docket Facility is open from 8:30 a.m. to 4 p.m., Monday through Friday, excluding legal holidays. The Docket Facility telephone number is (703) 305-5805.

    FOR FURTHER INFORMATION CONTACT: Jennifer Gaines, Registration Division (7505P), Office of Pesticide Programs, Environmental Protection Agency, 1200 Pennsylvania Ave., NW., Washington, DC 20460-0001; telephone number (703) 305-5967; e-mail address: gaines.jennifer@epa.gov.

    I found this at http://www.CyberRegs.com

  3. EPA is seeking public comments for Pesticide Program Dialogue Committee meeting in April.
    —————–
    ENVIRONMENTAL PROTECTION AGENCY

    [EPA-HQ-OPP-2009-0182; FRL-8406-7]

    Pesticide Program Dialogue Committee; Notice of Public Meetings

    AGENCY: Environmental Protection Agency (EPA).

    ACTION: Notice.

    SUMMARY: Pursuant to the Federal Advisory Committee Act, EPA gives notice of a public meeting of the Pesticide Program Dialogue Committee (PPDC) on April 22-23, 2009. A draft agenda is under development that will include reports from and discussions about current issues from the following PPDC work groups: Work Group on 21st Century Toxicology/New Integrated Testing Strategies; Work Group on Web-Distributed Labeling; and Work Group on Comparative Safety Statements for Pesticide Product Labeling. The agenda will also include a discussion about current water quality issues (including an update on spray drift); a discussion about an overall strategy regarding incident data, including pyrethroid incidents and pet incidents; and updates on the Endocrine Disruptors Screening Program, Pollinator Protection, and the Endangered Species Act consultation process.

    Several PPDC work group meetings have also been scheduled in March and April 2009, and are open to the public. Information about all of these meetings can be found on EPA’s website at: http://www.epa.gov/pesticides/ppdc.

    DATES: The PPDC meeting will be held on Wednesday, April 22, 2009, from 9 a.m. to 5 p.m., and Thursday, April 23, 2009, from 9 a.m. to 12:15 p.m.
    Hope you find this helpful. This data came from http://www.CyberRegs.com


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