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HEALTH FOR THE MILLIONS. 2001 Jan-Feb; 27(1):36.Around 30% of pesticides marketed in developing countries with an estimated market value of US $900 million annually do not meet internationally accepted quality standards. They are posing a serious threat to human health and the environment, the UN Food and Agriculture Organization (FAO) and the World Health Organization (WHO) have warned. "These poor-quality pesticides frequently contain hazardous substances and impurities that have already been banned or severely restricted elsewhere," said Gero Vaagt, FAO Pesticide Management Group. Such pesticides, he added, often contribute to the accumulation of obsolete pesticide stocks in developing countries. The global market value for pesticides is estimated at US $32 billion in 2000, with the share of developing countries around US $3 billion. In developing countries, pesticides are mainly used for agriculture, but also for public health, such as insecticides for controlling insects spreading malaria. Possible causes of low quality of pesticides can include both poor production and formulation and the inadequate selection of chemicals. "In many pesticide products, for example, the active ingredient concentrations are outside internationally accepted tolerance limits," said Dr. David Heymann, executive director of WHO Communicable Diseases activities. "In addition, poor-quality pesticides may be contaminated with toxic substances or impurities." (full text)
Indoor residual spraying. Use of indoor residual spraying for scaling up global malaria control and elimination. WHO position statement.
Geneva, Switzerland, WHO, Global Malaria Programme, 2006.  p. (WHO/HTM/MAL/2006.1112)WHO's Global Malaria Programme recommends the following three primary interventions that must be scaled up in countries to effectively respond to malaria, towards achieving the Millennium Development Goals for malaria by 2015 and other health targets: diagnosis of malaria cases and treatment with effective medicines; distribution of insecticide-treated nets (ITNs) to achieve full coverage of populations at risk of malaria; and indoor residual spraying (IRS) as a major means of malaria vector control to reduce and eliminate malaria transmission including, where indicated, the use of DDT. Scaling up access and achieving high coverage of these effective interventions, particularly to populations who are at the highest risk of malaria, and sustaining their implementation, remain major challenges for achieving current global malaria control goals. (excerpt)