Home, Pesticides & more Cancer

Common Weed Killer (Roundup) Shows Evidence of
Environmental and Health Problems SOURCE: Organic Gardening, July, 2000

Thousands and thousands of acres in the United States are being sprayed annually with nearly 50 million pounds of Roundup, a broad-spectrum herbicide designed to kill any plant it hits, unless the plant has been genetically altered to tolerate the chemical. Roundup has accounted for half of Monsanto's corporate profits in recent years. Now the company has expanded its Roundup market by genetically engineering "Roundup Ready" soybeans, corn, and other crops. Monsanto's advertising campaigns have convinced many people that Roundup is safe, but the facts simply do not support that conclusion. Independent scientific studies have shown that Roundup is toxic to earthworms, beneficial insects, birds and mammals. Plus it destroys the vegetation on which they depend for food and shelter. And although Monsanto claims that Roundup breaks down into harmless substances, it has been found to be extremely persistent, with residue absorbed by subsequent crops over a year after application. Roundup show adverse effects in all standard categories of toxicological testing, including medium-term toxicity, long-term toxicity, genetic damage, effects on reproduction, and carcinogenicity. Here is some of the research that demonstrates the ways that Roundup's active ingredient, glyphosate, adversely affects plants and animals:

In a study conducted by T.B. Moorman and colleagues at the USDA Southern Weed Science Laboratory in Stoneville, Mississippi, glyphosate reduced soybeans' and clover's ability to fix nitrogen. A study conducted by G.S. Johal and J.E. Rahe of the Center for Pest Management at Simon Frase University in Burnaby, British Columbia, found that glyphosate made bean plants more susceptible to disease. At Dalhousie University in Halifax, Nova Scotia, D. Estok and colleagues found that glyphosate reduces the growth of beneficial soil-dwelling mycorrhizal fungi.

Moving up to mammals, sperm production in rabbits was diminished by 50 percent when they were exposed to glyphosate, in research conducted by M.I. Youset and colleagues at the University of Alexandria in Egypt and the University of Tromso in Norway.

Brand-new evidence suggests that Roundup may cause cancer. The study, published in Environmental and Molecular Mutagenesis (vol. 31 pp. 55-59, 1998), found that an unidentified chemical in Roundup caused genetic damage in the livers and kidneys of mice exposed to the herbicide. The researchers believe additional experiments are needed to determine which chemical in the Roundup mixture is causing the damage. They point out that this will be very difficult because "the precise composition of the mixture...is not available due to protection by patent regulation." In other words, Monsanto doesn't have to reveal to the public exactly what chemicals are in Roundup.

In California, where pesticide-related illness must be reported, Roundup's active ingredient (glyphosate) was the third most commonly reported cause of pesticide illness among agricultural workers, and the most common cause of pesticide illness in landscape workers. According to two New Zealand toxicologists, the symptoms experienced by workers exposed to Roundup included eye and skin irritation, headaches, nausea and heart palpitations.

Homes, Pesticides & Neuroblastoma

Neuroblastoma Linked to Homes Treated with Pesticides

SOURCE: Epidemiology: 12(1):20-26, January, 2001

One of the largest studies to date has found that pesticide use around the home can more than double the chance of a child developing neuroblastoma.

Neuroblastoma accounts for approximately 10% of all childhood tumors. There are 550 new cases in the United States each year, with an annual incidence rate of 9.2 cases per million children under 15 years of age. This works out to approximately 1 per 100,000 children under age 15 on a national level. (These rates were reported in the book "Principles and Practice of Pediatric Oncology, Lippincott-Raven, 1997). It is a very serious cancer as approximately 60% of children over age 1 who develop neuroblastoma do not live 3 years even when receiving treatments of radiation and chemotherapy. Children under age 1 have a more positive prognosis. As statistics show that neuroblastoma rates have increased over the past 50 years, it is reasonable to assume environmental factors may be involved.

One of the largest collaborative efforts among 7 Universities and medical facilities worked together to determine what extent pesticide use in the home could increase child neuroblastoma rates. 390 neuroblastoma children and 460 non-cancer controls were included in the study. Investigators questioned both parents regarding use of pesticides in and around the home.

Results showed that using pesticides in and around the home resulted in a 60% increased likelihood of children developing the disease (Odds Ratio=1.6). Looking at pesticide use for the lawn and garden only resulted in an increased risk of 120% (Odds Ratio=2.2) when the mother had applied pesticides in the yard and 50% higher (Odds Ratio=1.5) when the father had applied pesticides in the yard.

(Chem-Tox Note: Outdoor pesticides are much different from indoor pesticides as they include fungicides and herbicides some of which have been reported to contain dioxin).

Julie L. Daniels, Andrew F. Olshan, Kay Teschke, Irva Hertz-Picciotto, Dave A. Savitz, Julie Blatt, Melissa L. Bondy, Joseph P. Neglia, Brad H. Pollock, Susan L. Cohn, A. Thomas Look, Robert C. Seeger, Robert P. Castleberry
Department of Epidemiology, School of Public Health, University of North Carolina, Chapel Hill, University of British Columbia, University of Texas, University of Minnesota, University of Florida, Northwestern University, Department of Experimental Oncology, St. Jude Children's Research Hospital and University of Alabama