(Beyond Pesticides, February 23, 2009) Permethrin and lindane metabolites are found in children who use lice shampoos containing the insecticides, according to researchers affiliated with the Centers for Disease Control and Prevention. The study, “Pesticide exposure resulting from treatment of lice infestations in school-aged children in Georgia,” published in the February issue of the journal Environment International, is the first to measure children’s exposure to chemical lice treatments. The researchers collected baseline urine samples from 78 enrolled children between the ages of six to ten years of age. About one-third of those children were diagnosed with head lice and subsequently treated with at least one over-the-counter permethrin lice treatment, a prescription lindane treatment, or both. Within seven days of the insecticide application, urine samples were again collected. The permethrin exposed children had significantly higher urinary pryrethoid metabolite levels in their post-exposure urine samples. Lindane metabolites were also elevated in urine samples after treatment. Interestingly, the study states, “Exposed participants appeared to have higher pre-exposure metabolite levels — likely from multiple treatments before enrollment — than unexposed participants.” Pentachlorophenol, a metabolite of lindane, was significantly higher in the urine of those children who used a lice treatment regardless of whether it […]

(Beyond Pesticides, November 12, 2008) Despite significant data gaps in the testing of apple moth pesticides, the California Department of Food and Agriculture recently reported that a new analysis conducted by three other state agencies “confirms the products tested are extremely low in toxicity.” An analysis of the state report by researchers at the Center for Environmental Health and Pesticide Action Network find that the report failed to address potential long-term health impacts from the pesticides and even omitted analysis of many of the acute symptoms suffered by people during last year’s spraying. “There is no evidence that the apple moth has damaged crops or native plants in California,” said Caroline Cox, research director at the Center for Environmental Health and Beyond Pesticides board member, “or that eradication of the moth can actually be achieved. It is never appropriate to expose large numbers of people to incompletely tested chemicals, especially in an eradication program based on faulty assumptions.” The toxicology studies on which the new analysis is based are designed to measure acute (short-term) toxicity. The studies ignore questions about significant health hazards, including the potential that the pesticide could cause cancer or birth defects, reduce fertility or harm our […]

(Beyond Pesticides, September 25, 2008) Pesticides used as lice treatments can not only have extremely harmful effects on children, they are also not as effective as non- chemical treatments such as utilizing directed hot air, according to researchers. Back-to-school season often coincides with lice outbreaks, and parents should be aware of the risks involved in using lice “shampoos” that contain pesticides and informed of the viability of non-toxic alternatives. Many of the recent headlines regarding lice in schools include reference to “super lice,” which are difficult to eliminate. These lice have developed resistance to the chemicals commonly used to treat them, such as lindane, malathion and permethrin, and therefore these treatments are increasingly ineffective. Insects frequently develop resistance to pesticides, a fact that emphasizes the importance of strategies both in agriculture and public health that focus on preventing pest outbreaks and dealing with outbreaks in ways that will not lead to resistance. One such method for eliminating head lice that will not lead to resistant strains of lice is the use of hot air, which desiccates the insects and eggs, thus killing them. Researchers testing six methods of hot air application found that hot air outperforms insecticidal shampoos in killing […]

(Beyond Pesticides, July 23, 2008) Aerial spraying for West Nile virus (WNv) over urban areas of Sacramento County, California has been halted for one week, after three days of spraying, in order to determine the success of the treatment. The results from a series of before-and-after mosquito trapping, dead bird testing and testing for infected mosquitoes are expected to take one week to complete before it is determined whether spraying should continue. The Sacramento-Yolo Mosquito and Vector Control District is hoping that previous treatments were successful in reducing infected mosquitoes and that it will not need to do more aerial spraying this season. Assistant manager, Gary Goodman, indicated that the possibility of continued spraying remains uncertain, as new data from dead bird testing, mosquito trap analyses and from human cases become available. To combat WNv, the Sacramento-Yolo district has sprayed the pesticide, Evergreen Crop Protection EC 60-6T (which contains pyrethrins) over selected urban areas. Spraying for mosquitoes over urban areas of the county started in 2005, even though aerial sprayings over agricultural fields and from the ground using trucks or hand crews have occurred for a long time. In 2005 however, WNv began spreading broadly in northern California, and Sacramento […]

(Beyond Pesticides, June 23, 2008) California state officials abruptly cancelled the program to spray pesticides to combat the light brown apple moth (LBAM). This move came after months of protests by residents over concerns that the chemicals in the pheromone-based pesticide may adversely impact their health and the environment.California’s Agriculture Secretary, A.G. Kawamura, announced on Thursday that the state has abandoned its plan for aerial spraying of the light brown apple moth in urban areas of several counties, including the San Francisco Bay area. However, sprayings may still proceed on farmland in rural areas. Officials also stated that they would not spray over communities near farms. “I know there’s concern out there, and we want to be able to address that,” Secretary Kawamura told reporters. “Our focus is to use the technology that has moved progressively forward.” Instead of spraying, the state said that it would keep moth populations under control by releasing sterile moths to halt reproduction by rendering eggs useless. Apparently the use of sterile moth as a means of population control has been a part of the state’s plans for more than a year. It is not clear therefore why aerial spraying was so heavily advocated by […]

(Beyond Pesticides, June 4, 2008) On May 29, 2008, the U.S. Environmental Protection Agency (EPA) released its final risk mitigation decision for ten rodenticides, which outlines new measures it says will help protect children and the public from accidental poisonings as well as to decrease exposures to pets and wildlife from rodent-control products. However, because the decision omits key uses, allows continued applicator use of dangerous formulations, and recognizes a lack of product efficacy without a fully integrated program (yet does not require it on the label), environmentalists feel the final risk mitigation decision falls short of adequately protecting the health of people, wildlife and the environment.EPA is requiring that ten rodenticides used in bait products marketed to consumers be enclosed in bait stations, making the pesticide inaccessible to children and pets, and is also prohibiting the sale of loose bait, such as pellets, for use in homes. These ten rodenticides are: ”¢ Brodifacoum ”¢ Bromadiolone ”¢ Bromethalin ”¢ Chlorophacinone ”¢ Cholecalciferol ”¢ Difenacoum ”¢ Difethialone ”¢ Diphacinone ”¢ Warfarin ”¢ Zinc phosphide Exposure to children is also a major concern for these chemicals. According to the 2006 Annual Report of the American Association Poison Control Centers’ National Poison Data […]

(Beyond Pesticides, May 28, 2008) Researchers have begun preliminary work to find suitable and safe alternatives to the widely used mosquito repellent DEET. Several possibilities have been identified, which repel mosquitoes for longer periods of time, but their safety for use on humans still needs to be investigated.Researchers, with funding from the Department of Defense, set out to determine what makes insect repellents work, and then to use that information in finding more effective ways to chase away disease-carrying insects. Insect repellents are used to repel biting insects such as mosquitoes and ticks that spread diseases such as encephalitis, Lyme disease, Rocky Mountain spotted fever, malaria and dengue fever. Ulrich R. Bernier, PhD, co-author of this study published online in the Proceedings of the National Academy of Sciences http://www.pnas.org/ and research chemist at the Agriculture Department’s mosquito and fly research unit in Gainesville, Fla., remarked that several of the new chemicals reviewed were “just phenomenal.” Using previous USDA data on hundreds of chemicals collected over 50 years, the researchers rated chemicals from “1” to “5” on ability to repel insects, and then focused on what the most effective ones ”” the 5s ”” had in common. They were able to […]

(Beyond Pesticides, May 16, 2008) Pressured by environmental organizations to protect children’s health and water quality in the Great Lakes, the Michigan House of Representatives has approved restrictions on the use of lindane, a toxic organochlorine pesticide used as a prescription drug to treat lice and scabies.  Under the legislation (HB 4569), the use of lindane  would be  prohibited except “under the supervision of a physician in his or her office if the physician considers the use of that product necessary for the treatment of a patient’s lice or scabies.” The Michigan Senate has not yet voted on the bill. Lindane has long been known for its neurotoxic properties, causing seizures, damage to the nervous system, and weakening of the immune system. It is also a probable carcinogen and endocrine disruptor. When used on people, lindane is regulated by the Food and Drug Administration (FDA). Despite the fact that it has been banned in 52 countries and restricted in over 30 more, FDA continues to allow its use in the U.S., albeit with a Public Health Advisory issued in 2003 that states, “Lindane should be used with caution in infants, children, the elderly, patients with skin conditions, and patients with […]

(Beyond Pesticides, May 14, 2008) On May 12, Judge Robert O’Farrell ruled on a lawsuit brought by Helping Our Peninsula’s Environment (HOPE), finding that California’s Agriculture Secretary, A.G. Kawamura, violated the law when the state aerially sprayed untested, ”˜secret’ pesticides on cities, children and wildlife. Judge O’Farrell then ordered the spraying stopped until the California Department of Food and Agriculture (CDFA) completes an Environmental Impact Report (EIR). HOPE attorney Alexander Henson said, “I’m glad that this case will set a precedent requiring government to do the required studies before they spray an unsuspecting populace with untested chemicals.” HOPE Trustee Terrence Zito said,  “Since last August HOPE has been saying that spraying people with secret, untested, unwanted pesticides is immoral and illegal. The courts have now twice confirmed that CDFA acted illegally.” Last month a Santa Cruz County Court ruled that the light brown apple moth (LBAM) was not an immediate threat and delayed aerial spraying of the pesticide, CheckMate (a pheromone-based pesticide with inert ingredients), in order for an EIR to be completed. In his ruling, presiding Judge Paul Burdick said the state did not prove that the invasive light brown apple moth poses an immediate threat to life or […]

(Beyond Pesticides, April 28, 2008) On April 24, a Santa Cruz County, California Court ruled that the light brown apple moth (LBAM) is not an immediate threat and delayed aerial spraying of a pheromone pesticide, CheckMate, in order to complete an environmental impact report. Then California Governor Arnold Schwarzenegger decided to delay the aerial spraying, vowing to prove that the chemical is safe. According to the Santa Cruz Sentinel, “Judge Paul Burdick said the state did not prove that the invasive light brown apple moth poses an immediate threat to life or property. As a result, he said, an emergency exception to finish the review while the spraying continues was not justified.” Governor Schwarzenegger announced on the same day that the California Department of Food and Agriculture (CDFA) will postpone aerial spraying with the pheromone pesticide until acute toxicology testing of eye, inhalation, respiratory and other potential irritants is completed. “I am confident that the additional tests will reassure Californians that we are taking the safest, most progressive approach to ridding our state of this very real threat to our agriculture, environment and economy,” said Governor Schwarzenegger in a press statement. CDFA estimates that once the testing is complete the […]

(Beyond Pesticides, April 16, 2008) The California Department of Food and Agriculture (CDFA) is warning that if pheromone spraying in the San Francisco Bay area is postponed this summer, more conventional insecticides could be used in the future to manage a larger-scale light brown apple moth (LBAM) infestation. The related legal brief was released Monday in response to a lawsuit that demands an environmental review before the pheromone, CheckMate, is sprayed this summer. A number of cities and counties have taken a stand against the spray, including Santa Cruz county’s lawsuit, the hearing for which is coming up on April 24. CDFA is resisting the counties’ attempts to delay their LBAM action plan. “The risk of greater conventional pesticide is out there,” said CDFA spokesman Steve Lyle. According to the brief, the pesticide to be used would be bacillus thuringiensus (Bt), which is commonly used in other areas of the country to fight insects like the gypsy moth. One concern of local researchers is the area’s populations of endangered and threatened moths and butterflies, which would be further threatened by a non-selective insecticide. Santa Cruz Councilman Tony Madrigal dismissed the brief as employing scare tactics. “They’re proposing a choice to […]

(Beyond Pesticides, March 10, 2008) Head lice affect an estimated 12 million people in the U.S. each year, and are rapidly becoming resistant to over-the-counter and prescription medications. Researchers at the University of Massachusetts Amherst have found that ivermectin, a compound produced by soil-dwelling bacteria, was 100 percent effective in killing head lice resistant to many standard treatments. Results were published in the January 2008 edition of the Journal of Medical Entomology. Although ivermectin is not well-absorbed through the skin, some public health advocates are concerned about its use on humans for lice and scabies. The National Pediculosis Association (NPA), a non profit agency, directs parents, health care professionals and child care providers to safer head lice control options via a standardized prevention approach focusing on routine screening, early detection and thorough combing and manual removal of lice and nits. NPA promotes this as a rational strategy over chasing lice with pesticides that offer more risk than benefit and have a well-documented history of lice resistance and failure.Most products used to treat head lice contain the insecticide pyrethrum, or its synthetic cousin permethrin, as the active ingredient. Over the past two decades, resistance to these chemicals has become a serious […]

(Beyond Pesticides, March 7, 2008) A number of counties in California’s Bay Area have voiced strong opposition to state plans to aerially spray a pheromone mixture over areas where the light brown apple moth (LBAM) has been found. While the California Department of Food and Agriculture (CDFA) plans to begin spraying this summer, state legislators and county officials alike are taking steps to postpone or halt it completely. By late February, Senator Carole Midgen had introduced a resolution to set a moratorium on aerial spraying in San Francisco and Marin counties. Assemblyman John Laird and others introduced a four-bill legislative package designed to ensure CDFA is “adequately prepared” for pest problems and public health is protected. Since then, a number of city councils have approved a variety of resolutions to oppose aerial spraying. Santa Cruz County has filed a lawsuit to stop the spraying, the court hearing for which has been postponed until April 24 in order to complete paperwork. “The county just received the administrative record from the state,” said county spokeswoman Dinah Phillips. “We’ll be going through that with a fine-tooth comb. We’re trying to get everything ready before the spraying begins.” The San Francisco Board of Supervisors […]

(Beyond Pesticides, February 22, 2008) The California Department of Food and Agriculture (CDFA) has released its latest schedule for assault on the light brown apple moth (LBAM), adding specifics to its previous outline of the 2008 plan. As has been previously reported, public outcry against the aerial spraying of a pheromone mixture has been widespread, in spite of the state’s insistence on the necessity of such measures. As a result, two state senators are introducing measures to stop, or at least postpone, spraying until safety and efficacy can be assured. The latest schedule from CDFA identifies anticipated components to the eradication effort. For instance, twist-ties (carrying the moths’ pheromone) will be applied to trees beginning February 25, which will be used alone in areas of low infestation, and “to complement mating disruption treatments against heaviest populations.” They will remain in place until an area is free from moths for two life-cycles. “Pheromone male moth attractant treatment,” applied to utility poles and trees, both on public and private property, will occur in areas of mid-level infestation, measuring at least 3,000 male moths per square mile. These applications will begin in April, and in areas of heaviest infestation, will precede aerial spraying. […]

(Beyond Pesticides, February 14, 2008) Researchers have found what they are calling the first insect resistance in the field to genetically engineered plants that are modified to produce an insecticide called Bacillus thuringiensis, or Bt. The University of Arizona (UA) researchers, who have previously received research support from Monsanto and Cotton, Inc., are supportive of bioengineered crops and dismiss the findings of resistance, given that they are only in cotton and no other crops. The report, “Insect resistance to Bt crops: evidence versus theory,” is due out in the February issue of Nature. Concern about resistance has raised fears in the organic community that Bt, derived from natural soil bacterium, would be rendered ineffective as insect resistance spreads and this natural control collapses over time.In organic systems, composted manures and cover crops replace synthetic fertilizers, innovative weeding strategies are used instead of herbicides, beneficial insects and trap crops control insect pests, and alternatives to toxic defoliants prepare plants for harvest. Bt-resistant populations of the insect bollworm, Helicoverpa zea, were found in more than a dozen crop fields in Mississippi and Arkansas between 2003 and 2006. The bollworm resistance to Bt cotton was discovered when a team of University of Arizona […]

(Beyond Pesticides, January 25, 2008) Officials with the California Department of Food and Agriculture (CDFA) recently released their 2008 plan for eradicating the light brown apple moth from the Central Valley area of the state. In 2007, a state of emergency was declared to facilitate quicker action to control the moths, as CDFA reports that the infestation is spread throughout nine counties. The agency tried to disrupt the moths breeding patterns by spraying a pheremone, Checkmate LBAM-F, in several different rounds, but the problem remains. As a result, CDFA has a variety of strategies planned to wipe out the moths this year. “The primary way to eradicate this pest remains aerial spraying,” according to CDFA spokesman Steve Lyle. “The expectation is that the program will move forward with that in mind in 2008.” However, on January 22, officials said that spraying will be postponed until late spring or early summer, when a better product has been found. The United States Department of Agriculture (USDA) is currently conducting trials in New Zealand to determine which formulation is most effective against the moths. One of these forumulations would last longer than 30 days in the environment, allowing less frequent aerial applications in […]

(Beyond Pesticides, January 15, 2008) Health officials have warned that a “widespread appearance” of mosquito-born diseases like dengue fever is a real possibility in the US. The disease is already beginning to make is presence felt with cases popping up in Texas, Hawaii and Puerto Rico. Dengue, a flu-like illness that infects 50 million to 100 million people a year, has been growing more prevalent and severe as it moves from tropical regions into more temperate areas, where it’s now endemic, and along the U.S. border with Mexico. Many fear that as temperatures increase in temperate regions due to global warming, mosquitoes could extend their northern migration in North America. “It’s starting to creep up from South America to the Caribbean,” Dr. Anthony S. Fauci, head of the National Institute of Allergy and Infectious Diseases, said in an interview. “If it can occur right at the tip of Texas, a disease which maybe people never heard of could actually appear here.” Drs. David Morens and Anthony Fauci of the National Institute of Allergy and Infectious Diseases brought attention to the issue in a paper entitled Dengue and Hemorrhagic Fever: A Potential Threat to Public Health in the United States, published […]

(Beyond Pesticides, January 8, 2008) Reclaiming Our Healthy Future: Political change to protect the next generation, the 26th National Pesticide Forum, will be held March 14-16 at the University of California, Berkeley. Register now to pay the pre-registration rate. James Roberts, M.D., associate professor of pediatrics at the Medical University of South Carolina and co-author of Recognition and Management of Pesticide Poisonings, and Jim Riddle, outreach coordinator for the University of Minnesota Organic Ecology program, have recently been added to the program. Previously announced speakers include Arturo Rodriguez (UFW President), Devra Davis, Ph.D. (author and University of Pittsburgh professor of epidemiology) and Tyrone Hayes, Ph.D. (UC Berkeley professor of integrative biology). Also, actress Kaiulani Lee will perform A Sense of Wonder, her one-woman play based on the life and works of Rachel Carson. Session topics include: Children’s health and public policy; Farmworker justice, organizing and consumer action; Building just and healthy food systems; Power of local activism to influence political change; Pesticides and the secret history of the war on cancer; Skills training sessions; DDT and malaria; Global warming and biofuels; Biomonitoring and pesticide drift; Lawns and landscapes; Managing indoor environments; Water quality and much more. Jim Riddle is outreach […]

(Beyond Pesticides, December 20, 2007) Responding to numerous requests from the public for more time to comment, the U.S. Fish and Wildlife Service has opened an additional 60-day public comment period on a draft mosquito management policy until February 17, 2008. The original press release on the proposal, issued on October 15, 2007, and the Federal Register Notice (72 FR 58321-58333) outlines guidance for determining the conditions under which national wildlife refuges will control mosquitoes. Notification of the public comment period was published in the Federal Register December 19, 2007. The Service received 35 comments during the original 45-day comment period, which closed on November 29, 2007. Mosquito Control Districts in several states as well as members of the public asked for more time to respond. The Service currently allows some form of mosquito control by state or local vector control agencies under Special Use Permits on approximately 40 national wildlife refuges, most of them in coastal areas. An interim Director’s Order, issued in May 2005, provided guidance for mosquito management on refuges while a permanent policy was being developed. The draft policy states that the Refuge System will allow populations of native mosquito species to exist unimpeded unless they […]

(Beyond Pesticides, December 13, 2007) New research shows that farmers and vineyard owners may be able to add another safe, environmentally-friendly weapon to their pest management arsenal. A commonly used parasitoid, or parasitic insect that kills its host, has proven to be quite effective in the control of fruit flies in vineyards. These tiny pest-devouring insects are considered to be powerful “biocontrol agents” since they reduce the dependency on chemical pest management applications. Jean Pierre Kapongo, Ph.D., an entomologist specializing in environmental health at the University of Guelph in Ontario, Canada, recently published the results of a research study that will aid vintners and fruit farmers in their ability to produce healthier crops. According to Kapongo, vineyard owners and farmers can now control fruit flies (Ceratitis capitata) with Muscidifurax raptor, a parasitic wasp currently used in the control of other types of pests, including other species of flies. The study investigated the use of Muscidifurax raptor to control fruit flies in vineyards. Until recently, fruit flies have usually been controlled with chemical insecticides, biopesticides and selected natural enemies. For instance, to control a recent Medfly infestation in California, local agencies used a pesticide derived from spinosad, a naturally occurring extract […]

(Beyond Pesticides, October 24, 2007) The aerial spraying for eradication of the brown apple moth, which has been disputed by environmentalist and concerned residents, is set to resume this week. This is a result of the lifting of the temporary restraining order against the use of the pesticide, in light of the order given by Governor Schwarzenegger that called on the California Department of Food and Agriculture to release the names of the chemical components of the pesticide and then restart spraying. On Friday a Monterey judge determined that the pesticide, CheckMate LBAM-F, did not contain toxic chemicals and lifted the ban instituted October 10. The restraining order was first granted more than 100 residents complained of health problems after the spraying first took place last month over the Monterey peninsula. Environmental groups sued the state claiming that a health safety assessment was never conducted before spraying. That suit is still pending. The lingering concerns prompted the governor to order the state to release the ingredients on Saturday, despite efforts by the manufacturer to keep the contents secret. California Secretary of Food and Agriculture, A.G. Kawamura, said in a statement on Saturday that the governor supports the public’s right to […]

(Beyond Pesticides, September 17, 2007) Mediterranean fruit flies were discovered last week in Dixon, California, and federal, state, and county agencies rushed to respond with traps, biopesticide treatment, and sterile mates to prevent the insect from infesting local agriculture. A total of eight Medflies have been found so far, and the three-pronged attack started with an effort to monitor the presence of the Medfly. California Department of Food and Agriculture (CDFA) employees have placed 1,700 fruit fly-targeted detection traps in an 81-square-mile grid. Next, residents within 200 meters of the original finding had their yards treated with the organic compound Naturalyte, the active ingredient of which is spinosad, a naturally occurring extract from bacteria. The pesticide, made by Dow, is approved for use on organic crops, yet the vast majority of its ingredients (so-called “inerts”) are not disclosed. As another biological control, more than 3 million sterile male flies were released last Friday in a 12-square-mile area around Dixon. The sterile males will be deployed on a weekly basis to mate with wild females, helping to eradicate the Medfly population. This is the first Medfly case in Solano County, according to county agriculture officials. Agriculture Commissioner Jerry Howard said that […]

(Beyond Pesticides, September 4, 2007) Scientists identified an important biochemical piece in the passage of malaria from mosquitoes to humans. If this link in the chain can be broken at its source””the mosquito””then the spread of malaria could be stopped without the use of harmful pesticides or costly drugs. “Mosquito Heparan Sulfate and Its Potential Role in Malaria Infection and Transmission,” published in the August 31 issue of the Journal of Biological Chemistry, contains the findings of the interdisciplinary team led by researchers from Rensselaer Polytechnic Institute. The research group found that humans and the mosquitoes that carry the malaria parasite Plasmodium share the same complex carbohydrate, heparan sulfate. In both humans and mosquitoes, heparan sulfate is a receptor for the Plasmodium, binding to the parasite and giving it quick and easy transport through the body. Robert J. Linhardt, Ph.D., professor of Biocatalysis and Metabolic Engineering at Rensselaer, led the team. “The discovery allows us to think differently about preventing the disease. If we can stop heparan sulfate from binding to the parasite in mosquitoes, we will not just be treating the disease, we will be stopping its spread completely,” Dr. Linhardt said. Malaria parasites are specific to their host, […]