17
Oct
(Beyond Pesticides, October 17, 2008) A study published in the September 15 issue of Environmental Science & Technology has found pyrethroid contamination in 100 percent of urban streams sampled. Synthetic Pyrethroids are one of the most widely used consumer pesticides, but recently they have been scrutinized for their resultant health and environmental effects. California is currently reevaluating certain pyrethroid-containing pesticides as a result of increasingly conclusive research. Entitled “Statewide Investigation of the Role of Pyrethroid Pesticides in Sediment Toxicity in California’s Urban Waterways,” the research included California’s most urbanized regions, as well as the less developed North Coast and Lake Tahoe areas. Thirty creeks in eight regions were selected from 90 screened sites, and bioassays were conducted at two temperatures, 23 and 15 degrees Celsius. Researchers found 25 samples to be toxic at the higher temperature and all 30 at the lower, which is where pyrethroids are more toxic. “Bifenthrin was the pyrethroid of greatest toxicological concern, occurring in all 30 samples,” wrote the team, and the Los Angeles, Central Valley, and San Diego regions showed the most severe contamination. The sampling included analysis for 8 pyrethroids, 30 organochlorine pesticides, and piperonyl butoxide, which helps to make pyrethroids toxic at […]
Posted in Bifenthrin, California, Chemicals, Lawns/Landscapes, Pesticide Regulation, Pyrethrin, Texas, Water | No Comments »
01
Aug
(Beyond Pesticides, August 1, 2008) The Oregon Department of Agriculture has released the 2007 Pesticide Use Reporting System (PURS) annual report, summarizing data collected last year -making it the first report to include information from a mandatory electronic reporting of pesticide use statewide. The requirement to report online applies to anyone using a registered pesticide or pest control product in the course of business, for a government entity, or in a public place. The 2007 annual report also includes data from a household pesticide use survey. The release comes nine years after being authorized by the state legislature, due to debate over funding and scope of the report. The required reporting is also set to expire in 2009, requiring activists to lobby for continuation of the program. For 2007, there were 5,732 reporters who filed 284,984 reports of pesticide use into PURS. The reports identified 551 active ingredients used statewide last year. The most used active ingredient, by pounds, was the soil fumigant metam-sodium (42 percent of total pounds reported), which is often used before planting potatoes to kill most soil life. The next two most commonly used active ingredients were the herbicide glyphosate (9 percent), and copper naphthenate (7 […]
Posted in Bifenthrin, Oregon, Pesticide Regulation | No Comments »
01
Mar
(Beyond Pesticides, March 1, 2007) In 24 states throughout the country, beekeepers have been shocked to find that bees have been inexplicably disappearing at an alarming rate, according to an article in the New York Times last week. This loss of honeybees threatens not only beekeeper livelihoods but also the production of numerous crops, including California almonds, one of the nation’s most profitable crops. Although the reasons for the honeybee disappearances are unknown, pesticides may be one of the culprits. “I have never seen anything like it,” David Bradshaw, a California beekeeper, said. “Box after box after box are just empty. There’s nobody home.” Last month he discovered that half of his 100 million bees were missing. Beekeepers have fought regional bee crises before, but this is the first national affliction. Bees are flying off in search of pollen and nectar and simply never returning to their colonies. And nobody knows why. Researchers say the bees are presumably dying in the fields, perhaps becoming exhausted or simply disoriented and eventually falling victim to the cold. As researchers scramble to find answers to the syndrome they have decided to call “colony collapse disorder,” growers are becoming openly nervous about the capability […]
Posted in Bifenthrin, Chemicals, Wildlife/Endangered Sp. | 2 Comments »
