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by Razaan Abakar | 03-10-2017 21:21
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Organic Farming: Conventional farms rely on an array of synthetic pesticides to kill weeds, disease causing fungi, and harmful insects. These pesticides are manufactured by chemical processing petroleum, natural gas, ammonia, and a number of other raw materials. They include active and inactive ingredients, both of which can be highly toxic and long lasting. Organic farmers typically use pesticides primarily derived from unaltered plant, animal or mineral substances in which the active toxic ingredient breaks down rapidly to become nontoxic after being applied to the crop. Pyrethrum, a substance extracted from chrysanthemums, a variety of soaps, and oil from the need tree are among the insecticides used by organic farmers, Bordeaux mix, a combination of calcium carbonate and copper, is used by organic farmers to control disease causing fungi. Air Pollution Several pollutants attache the ozone layer. Chief among them is the class of chemicals known as pesticide methyl bromide. Soil Management: The effectiveness of a pesticide as well as the hazards of harmful residues depend largely on how long the pesticide remains in the soil. For example, DDT, a chlorinated hydrocarbon, has a half life of three years in cultivated soils, while organophosphorus insecticides persist for only days or months. Chlorinated hydrocarbon persist longer in soils having a large amount of organic matter, although more of the chemical must be applied to these soils to kill pests. Insecticides persist longer if worked into the soils than if left on the surface. Eventually, all pesticides disappear because of evaporation and vaporization, leaching, plant uptake, chemical and microbial decomposition, and photodecomposition. Pesticides effect on animal life and also cause water pollution. Source: Microsoft Student with Encarta Premium. |
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2 Comments
Hi, Razaan! Thanks for your detailed explanation about types and effects of chemical, organic pesticides. I hope more farmers to recognize positive aspects of organic pesticides and utilize them actually. We have to give them an opportunity to absorb that information and at the same time, keep research on alternatives to completely replace established one.
Additionally, I've read articles about some farmers who neglect those problems and keep trust their own way of using chemical pesticides too much. Farmers themselves should definitely put in the effort to be changed.
Posted 06-10-2017 03:55
Hi, Razaan! Thank you for your report on pesticides. I liked how you presented the names of the compounds in detail, and provided information on how air and soil pollution are caused by pesticides (instead of skipping an explanation). The organic pesticide mixtures that you've introduced were also very interesting. Using natural mixtures like these, instead of chemical pesticides, will be easier on the environment and not as harmful to human health. Other organic methods that are often used by farmers are biological methods, such as using the natural predator of the pests. The predators control the pests by eating them, and this doesn't harm the crops or other animals (including humans). Since there are so many existing alternatives to chemical pesticides, I hope that people will be willing to use them, even if they may cost more or take more time and effort.
Posted 04-10-2017 11:25