How do insecticides disturb the balance of populations residing in the soil?
436972
by killing insects, it disrupts the foodchain at a low level, affecting everything above it. also, any good things the insects might have done, like pollinating plants etc will be stopped.
189245
Insects are sprayed with DDT, then other animals eat them, then yet other animals eat those. DDT absorbs into fatty tissues and can persist without being removed. \n\n Despite claims about thinning eggshells in birds, no scientific study has shown DDT to harm any animal other than insects evan at very high doses.
755113
Probably mostly positive. The soil would be richer so plants would grow better making more food for all creatures locally. That would result in greater biodiversity.
1032957
Soil Science An Interdisciplinary Approach to Soil Research, satisfies the professional needs of all scientists and laboratory personnel involved in soil and plant research. The authoritative research articles published in the journal report the most significant work of leading experts from every area of soil and plant science–soil chemistry, physics, fertility, morphology, microbiology, and environmental soil science.\n\nThe pH of soil or more precisely the pH of the soil solution is very important because soil solution carries in it nutrients such as Nitrogen (N), Potassium (K), and Phosphorus (P) that plants need in specific amounts to grow, thrive, and fight off diseases. \n\nIf the pH of the soil solution is increased above 5.5, Nitrogen (in the form of nitrate) is made available to plants. Phosphorus, on the other hand, is available to plants when soil pH is between 6.0 and 7.0. \n\nCertain bacteria help plants obtain N by converting atmospheric Nitrogen into a form of N that plants can use.These bacteria live in root nodules of legumes (like alfalfa and soybeans) and function best when the pH of the plant they live in is growing in soil within an acceptable pH range. \n\nFor instance, alfalfa grows best in soils having a pH of 6.2 - 7.8, while soybean grows best in soils with a pH between 6.0 and 7.0. Peanuts grow best in soils that have a pH of 5.3 to 6.6. Many other crops, vegetables, flowers and shrubs, trees, weeds and fruit are pH dependent and rely on the soil solution to obtain nutrients. \n\nIf the soil solution is too acidic plants cannot utilize N, P, K and other nutrients they need. In acidic soils, plants are more likely to take up toxic metals and some plants eventually die of toxicity (poisoning). \n\nHerbicides, pesticides, fungicides and other chemicals are used on and around plants to fight off plant diseases and get rid of bugs that feed on plants and kill plants. Knowing whether the soil pH is acidic or basic is important because if the soil is too acidic the applied pesticides, herbicides, and fungicides will not be absorbed (held in the soil ) and they will end up in garden water and rain water runoff, where they eventually become pollutants in our streams, rivers, lakes, and ground water.
560935
Ph affects the population of everything! Just try having sulfuric acid for breakfast instead of OJ. Bacteria in the swimming pool? Add bleach. Changes the Ph kills the bacteria. Low Ph does the same. Acid soil will kill the worms too.
243163
organic debris in the soil.
771798
Well..the larvae would have survived and been stuck to all those dead carcasses that were floating on the surface...wasn't so much evolution as it was survival of the fittest...it's hard to kill all those bugs....and their larvae...and bacteria...hey...what a breeding grounds...whewee...
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Spraying pesticides has turned out to be a failure\nat controlling malaria, quite apart from the harm it\ndoes to nonpest species.  The mosquitoes have\nbecome resistant to the pesticides, just as the\nmalaria parasite has become resistant to the\nmedications used to kill them.  Furthermore, when\na mosquito population has become resistant to\none kind of pesticide it usually can develop a\nresistance to another pesticide more quickly.\nOther methods of controlling mosquitoes need to\nbe developed to replace the indiscriminate use\nof pesticides.
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The experimental fragmentation of landscapes of a natural ecosystem resulted in declines in the abundance and distribution of most species in the multispecies animal community inhabiting the landscapes and the extinction of many species. These declines caused the deterioration of the positive interspecific relation between local population abundance and distributional extent in this community. However, when patches were connected by habitat corridors, an immigration "rescue effect" arrested declines in both abundance and distribution and maintained the observed positive relation between them. These results demonstrate the importance of metapopulation dynamics and landscape connectivity for the persistence of populations in fragmented landscapes.
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Systemic insecticides are a special group of insecticides that are taken up into the plant through it's leaves or through it's roots. \nhttp://www.mobot.org/gardeninghelp/hortline/messages/3145.shtml  \n \n\nSystemic insecticides work best, "systemic" referring to a product that travels throughout the plant's system. Insects are killed when they feed on the sap. These insecticides are usually sold as granules. \nhttp://pss.uvm.edu/ppp/articles/feb03tip.html  \n \n\nSYSTEMIC INSECTICIDE - A pesticide which can be granular or liquid, used at the base of the plant and travels through the vascular stream.\n[back to top] \n-T- ... \nhttp://www.emilycompost.com/garden_glossary.htm
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Many Organic compounds affected the environment,hydrocarbons , Oil and its derivatives , like gasoline. Flour anted Chloris carbon compounds like Freon affect the ozon layer.Pesticides affect the environment by its toxicity to humans and animals.Organophosphorous compounds are very toxic and used as ware fare agents.Most of organic compounds are carcinogenic when they used un properly.
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Most systems, when left alone, will tend to come to a "steady state" or be at rest.  In the case of balancing the ecosystem, overpopulation is a situation that I tend to think would eventually be controlled by the environment.\n\nAs an example, consider bacteria and viruses for which not everyone is immune nor is there necessarily a vaccine.  The increase in population ensures: a) that there are more hosts for these agents to travel; and b) that the agent doesn't have that far to travel, so it does so quickly.  Epidemics have a way of balancing out overpopulation.\n\nIn some cases, people make the mistake of introducing some 'agents' (not necessarily viruses, but such as in a recent case with toads) into an environment in which they help control the population in one aspect, but then the agent itself overpopulates.  Eventually, as it runs out of food (unless it has several plentiful sources in the environment to which it's been transplanted) it too will experience a loss in population.
224139
Try to kill that bug with some pesticide.
1147378
if all the rivers and streams become polluted,certainly the balance of ecosystem will get disturbed.The only result will  be the perish of life from earth.
702645
From exactly what you said in bold letters....they break down organic matter.  Otherwise the Earth would be littered with dead animals, leaves, trees, birds etc.  Fungus, bacteria, and insects are all decomposers and a very important part of the Life Cycle.\n\nThe organic matter is then released into the soil and taken up in the raw nutrient/mineral content by plants>animals eat plants>animal dies>cycle repeats.
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I don't know an example related to pesticides, but I do know one related to herbicides.\n\nAgent orange is a defoliant (kills plants) and it was used in the Vietnam War.  The manufacture of it also produced an unwanted byproduct called Dioxin.  This chemical is bad for humans, and this is why agent orange is linked with some sickness that people had after being exposed to agent orange, even though the herbicide wasn't the problem...the toxic byproduct was.\n\nIn the manufacture of organic molecules, you often get byproducts.  When developing chemical pesticides, you could inadertently produce chemicals that are toxic to more than you want them to be, and they need to be separated properly from your pesticide.
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Some individuals have had success conducting their own exterminations by preparing an insecticide mixture of pyrethrins and fresh-water diatomaceous earth. At least one manufacturer produces a household insecticide D-20 with only .2% naturally derived pyrethrins and 1.0% Piperonyl Butoxide, which magnifies the pyrethrins effectivenes by 10 times. Natural pyrethrins are more expensive than many alternatives. The function of the pyrethrins is to stimulate the nervous system of the bugs so that the spasms will allow the diatomaceous earth to dessicate, puncture, and kill the bugs through mechanical action. Great care should be taken not to use products with salt-water diatomaceous earth or heat-treated diatomaceous earth, which can damage the lungs of any mammal (dogs, cats, or humans) which inhale it, and has also been known to cause cancer. Fresh-water diatomaceous earth, however, is commonly used to deworm cats, dogs, and humans, and is considered as safe as table salt.\n\nOthers have used fruit and vegetable insecticides, comprised of a mixture of pyrethins and canola oil, which are usually safe for humans and most pets (aside from fish).\n\nContrary to popularly disseminated information, extreme heat or extreme cold is usually not effective in eliminating bedbugs. Pest control professionals receive reports of infestations even in the dead of winter, and manufactured environments of extreme heat or cold (such as encasing a mattress in a bag and placing it in direct sunlight, or placing a suspect piece of bedding or clothing in a freezer) usually cannot stay consistently hot or cold enough to sufficiently kill bedbugs, which are not particularly sensitive to temperature extremes. In addition, since bedbugs normally disperse, treatment of a bed or mattress is insufficient to eradicate an infestation.