Association of American Pesticide Control Operators,” 2005 Pesticide Drift Enforcement Survey,” 2005.
Reports on the results from 2002 and 2003 farmer surveys, including on pesticide drift damage. FULL TEXT
Chuck Abbott, “Arkansas Task Force Aims for Long-Term Recommendations on Use of Dicamba,” The Fern, August 9, 2017.
Arkansas has appointed a 21-member task force to help identify solutions for the dicamba drift damage problem, with 900 complaints received this year so far. FULL TEXT
Chuck Abbott, “Dicamba is ‘tremendous success,’ says Monsanto;mulls rule change,” FERN’s AG Insider, August 31, 2017.
Monsanto claims they will have enough dicamba-resistant seed available for half the U.S. soybean acreage, and chief technology officer Robb Fraley described dicamba as a “tremendous success” for most farmers. EPA, however, is considering changes ahead of the 2018 season. “We don’t consider this to be normal growing pains for a new technology,” says an EPA official who oversees herbicide regulations. Monsanto again claims the key is “strict adherence to instructions.” FULL TEXT
Acquavella JF, Alexander BH, Mandel JS, Gustin C, Baker B, Chapman P, Bleeke M, “Glyphosate biomonitoring for farmers and their families: results from the Farm Family Exposure Study.” Environmental Health Perspectives, 2004, 112:3.
ABSTRACT: Glyphosate is the FULL TEXTin Roundup agricultural herbicides and other herbicide formulations that are widely used for agricultural, forestry, and residential weed control. As part of the Farm Family Exposure Study, we evaluated urinary glyphosate concentrations for 48 farmers, their spouses, and their 79 children (4-18 years of age). We evaluated 24-hr composite urine samples for each family member the day before, the day of, and for 3 days after a glyphosate application. Sixty percent of farmers had detectable levels of glyphosate in their urine on the day of application. The geometric mean (GM) concentration was 3 , the maximum value was 233 ppb, and the highest estimated systemic dose was 0.004 mg/kg. Farmers who did not use rubber gloves had higher GM urinary concentrations than did other farmers (10 ppb vs. 2.0 ppb). For spouses, 4% had detectable levels in their urine on the day of application. Their maximum value was 3 ppb. For children, 12% had detectable glyphosate in their urine on the day of application, with a maximum concentration of 29 ppb. All but one of the children with detectable concentrations had helped with the application or were present during herbicide mixing, loading, or application. None of the systemic doses estimated in this study approached the U.S. Environmental Protection Agency reference dose for glyphosate of 2 mg/kg/day. Nonetheless, it is advisable to minimize exposure to pesticides, and this study did identify specific practices that could be modified to reduce the potential for exposure.
Adams, A, Friesen, M, Olson, A, Gerona, R. “Biomonitoring of glyphosate across the United States in urine and tap water using high-fidelity LC-MS/MS method,” 2016. Poster presentation, access at: http://cehn-healthykids.org/wp-content/uploads/2017/02/APAMT-Poster-Gerona.pdf.
Agopian AJ, Lupo PJ, Canfield MA, Langlois, “ of maternal residential atrazine exposure and male genital malformations,” American Journal of Medical Genetics Part A, 2012, 161A:5, doi: 10.1002/ajmg.a.35815.
ABSTRACT: Exposure to endocrine disrupting chemicals has been associated with risk for male genital malformations. However, residential prenatal exposure to atrazine, an endocrine disrupting pesticide, has not been evaluated. We obtained data from the Texas Birth Defects Registry for 16,433 cases with isolated male genital malformations and randomly selected, population-based controls delivered during 1999-2008. County-level estimates of atrazine exposure from the United States Geological Survey were linked to all subjects. We evaluated the relationship between estimated maternal residential atrazine exposure and risk for male genital malformations in offspring. Separate unconditional logistic regression analyses were conducted for hypospadias, cryptorchidism, and small penis. We observed modest, but consistent, associations between medium-low and/or medium levels of estimated periconceptional maternal residential atrazine exposure and every male genital malformation category evaluated (e.g., adjusted odds ratio for medium compared to low atrazine levels and all male genital malformations: 1.2, 95% confidence interval: 1.1-1.3). Previous literature from animal andsupports our findings. Our results provide further evidence of a suspected teratogenic role of atrazine.
American Soybean Association, ” ASA Steps up Urgency in Search for Answers on Dicamba Damage,” ASA News Release, September 25, 2017.
This American Soybean Association (ASA) news release addresses dicamba drift damage, now an issue in 21 of the 30 soybean producing states, and reiterates their support of new formulations since “farmers need and want new technologies to help fight resistant weeds” but call out the “need to ensure that these products can be used by farmers…safely.” Ron Moore, ASA president and farmer in dicamba-drift affected Illinois is extensively quoted and cites the ASA’s support for independent research at university ag departments in the affected states, and calls for “additional education, applications restrictions, or other actions” to address root causes of the drift problem. While the problem is mainly stemming from soybeans, Moore recognizes the “good neighbor aspect…ASA has a duty to ensure that we are successfully coexisting with other crops.” FULL TEXT
Anway, Matthew D., Cupp, Andrea S., Uzumcu, Mehmet, and Skinner, Michael K., “Transgenerational Actions of Endocrine Disruptors and Male Fertility,” Science, 2005, 308:5727, DOI: 10.1126/SCIENCE.1108190.
Transgenerational effects of environmental toxins require either a chromosomal or epigenetic alteration in the germ line. Transient exposure of a gestating female rat during the period of gonadal sex determination to the endocrine disruptors vinclozolin (an antiandrogenic compound) or methoxychlor (an estrogenic compound) induced an adult FULL TEXTin the F1 generation of decreased spermatogenic capacity (cell number and viability) and increased incidence of male infertility. These effects were transferred through the male germ line to nearly all males of all subsequent generations examined (that is, F1 to F4). The effects on reproduction correlate with altered DNA patterns in the germ line. The ability of an environmental factor (for example, endocrine disruptor) to reprogram the germ line and to promote a transgenerational disease state has significant implications for evolutionary biology and disease .
Arbuckle TE, Savitz DA, Mery LS, Curtis KM, “Exposure to phenoxy herbicides and the risk of spontaneous abortion,” Epidemiology, 1999, 10:6.
ABSTRACT: The Ontario Farm Family Health Study was designed to assess retrospectively the potential adverse effects of exposure to pesticides on pregnancy. Information on the health and life style of approximately 2,000 farm couples, as well as a history of use of pesticides on the farm, was collected by questionnaire. This analysis focuses on pre- and postconception exposure to phenoxy herbicides and the risk of spontaneous abortion using the complete (to date) pregnancy history for each woman. Preconception exposure (from 3 months before conception to the month of conception) was weakly associated with the risk of spontaneous abortion at <20 weeks’ gestation [adjusted odds ratio (OR) = 1.1; 95% confidence interval (CI) = 0.6-1.9]. When the analyses were restricted to spontaneous abortions of <12 weeks, the risk was more than doubled (adjusted OR = 2.5; 95% CI = 1.0-6.4), but the results were sensitive to the cutpoint used. If the husband did not normally wear protective equipment during application, the crude OR for early spontaneous abortions was 5.0 (95% CI = 0.7-36.2). Exposure to phenoxy herbicides during the first trimester was generally not associated with increased risk of spontaneous abortion. The results suggest a possible role of preconception (possibly paternal) exposures to phenoxy herbicides in the risk of early spontaneous abortions.
Arbuckle TE, Lin Z, Mery LS., “An exploratory analysis of the effect of pesticide exposure on the risk of spontaneous abortion in an Ontario farm population,” Environmental Health Perspectives, 2001, 109: 8.
ABSTRACT: The toxicity of pesticides on human reproduction is largely unknown–particularly how mixtures of pesticide products might affect fetal toxicity. The Ontario Farm Family Health Study collected data by questionnaire on the identity and timing of pesticide use on the farm, lifestyle factors, and a complete reproductive history from the farm operator and eligible couples living on the farm. A total of 2,110 women provided information on 3,936 pregnancies, including 395 spontaneous abortions. To explore critical windows of exposure and target sites for toxicity, we examined exposures separately for preconception (3 months before and up to month of conception) and postconception (first trimester) windows and for early (< 12 weeks) and late (12-19 weeks) spontaneous abortions. We observed moderate increases in risk of early abortions for preconception exposures to phenoxy acetic acid herbicides [odds ratio (OR) = 1.5; 95% confidence interval (CI), 1.1-2.1], triazines (OR = 1.4; 95% CI, 1.0-2.0), and any herbicide (OR = 1.4; 95% CI, 1.1-1.9). For late abortions, preconception exposure to glyphosate (OR = 1.7; 95% CI, 1.0-2.9), thiocarbamates (OR = 1.8; 95% CI, 1.1-3.0), and the miscellaneous class of pesticides (OR = 1.5; 95% CI, 1.0-2.4) was associated with elevated risks. Postconception exposures were generally associated with late spontaneous abortions. Older maternal age (> 34 years of age) was the strongest risk factor for spontaneous abortions, and we observed several interactions between pesticides in the older age group using Classification and Regression Tree analysis. This study shows that timing of exposure and restricting analyses to more homogeneous endpoints are important in characterizing the reproductive toxicity of pesticides. FULL TEXT