. Cranberries; : the national cranberry magazine. Cranberries. able situations in which people became involved in deciding about the use of pesticides, who in many cases, were not at all familiar with agricultural problems and pesticides. The cranberry industry has been accused of polluting the environ- ment with pesticides. Over the years we have accumulated data on this subject, and now we are able to comment on this issue. With respect to dieldrin, there are data available showing that the chemical which reaches the ground, is adsorbed on soil particles within 12 to 24 hours. There are also
. Cranberries; : the national cranberry magazine. Cranberries. able situations in which people became involved in deciding about the use of pesticides, who in many cases, were not at all familiar with agricultural problems and pesticides. The cranberry industry has been accused of polluting the environ- ment with pesticides. Over the years we have accumulated data on this subject, and now we are able to comment on this issue. With respect to dieldrin, there are data available showing that the chemical which reaches the ground, is adsorbed on soil particles within 12 to 24 hours. There are also enough data available indicating that leaching removes measurable amounts of dieldrin from soil only together with organic matter to which the chemical is adsorbed. Studies of water samples and bottom sediments from water bodies in drainage areas of cranberry bogs show that their dieldrin content is neither higher nor lower than in other parts of the country. It can be said that our most consistent source of dieldrin in Southeastern Massachusetts may be precipitation. Parathion has caused only few local problems if applied according to recommendations. This surprising fact is based partly on the observa- tion that parathion is rapidly ad- sorbed on soil particles, so it "dis- appears" from the water within 24 to 48 hours. On the other hand, parathion breaks down rapidly ex- hibiting no residual effect like dieldrin. However, if parathion is sprayed on running water, fishkills downstream are almost inevitable. Eutrophication Cranberry production is often linked to eutrophication mostly be- cause of lack of information. Eutro- phication (derived from the Greek words "well" and "nourished") is the nutrient enrichment of water which frequently results in an array of typical changes, among which increased production of algae and other aquatic plants are found ob- jectionable and impair water use. Eutrophication is a natural process which occurs very sl
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