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Why do farmers who use chemical pesticides to control pests have to increase the amount applied to their fields each year?
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What type of chemical compound used for killing pest?
In general, such chemical compounds are called pesticides. Different types of pests require different pesticides to control them. Permethrin is a very common pesticide used for controlling insect pests. My ex-girlfriend is a total pest and I have considered using Lead and Cordite to control her.
Why are pesticides necessary?
To increase crop yield, reduce disease likelihood and infestation of businesses and to control populations. For example man is the rat's primary predator. if we did nothing to control them, in many places they would take over.
What is chemical control?
Control with the use of chemicals
Different areas of human needs where chemical products are used?
make up plastic rubber Synthetic fabrics hair color gasoline glass vitamins
How do chemical fertilizers and pesticides affect the production in agriculture?
Positive Effects of Chemical FertilizersPlants require nutrients in the soil to grow and produce fruits and vegetables for consumption. These nutrients become depleted through overplanting, erosion and other conditions. Replacing these nutrients helps use soil and water resources efficiently. According to the International Fertilizer Industry Association, farmers can double or even triple crop yields by using fertilizers. Farmers also use manure products such as cow dung, pig excreta and chicken droppings to fertilize soil and increase yields.Negative Effects of Chemical FertilizersThough chemical fertilizers increase food production for nations all over the world, the negative effects to the environment have become inarguable. The chemicals that compose fertilizer, such as nitrogen and phosphorus, run off into local waterways during rainy periods. These chemicals cause algae blooms in the water which then die, increasing the bacterial content. This increase kills fish and disrupts the food supply of other animals that feed on the fish. Organic fertilizers do not contain these chemicals, therefore they do not produce this effect on the environment.Positive Effects of Chemical PesticidesFarmers use chemical pesticides to eliminate insects and diseases that destroy crops and diminish food supply. These compounds work very well in killing the insects that feed on the roots, leaves and stems of both food crops and garden flowers. Using these pesticides saves the crops that feed nations all around the world. They can often mean the difference between a healthy, expanding population and malnutrition and death.Negative Effects of Chemical PesticidesChemical pesticides are linked to a number of illnesses including cancer, lymphoma, reproductive abnormalities, endocrine disorders and neurological problems. According to ScienceDaily, scientists in a UCLA study have discovered links between Parkinson's disease and the use of two common pesticides, maneb and paraquat. Health experts are particularly concerned about pesticide exposure in children because they proportionally consume more food during their growing years and are often in contact with floor surfaces where pesticide residues are found. Pesticides also kill insects indiscriminately, destroying insects that are beneficial to plants and an important food source for other creatures. Some farmers are adopting more organic methods of pest control, such as introducing natural predators of the insects and using of plant extracts to repel insects. These methods reduce effects of pesticides on human health and the environment.
What reason might a farmer have for using biological control instead of chemical pesticides?
what reason might a farmer have for using bioligical control instead of chemical pesticides
What can control an invasive species?
pesticides or any other chemical
What are some biological alternatives to chemical pesticides?
Some biological alternatives to the use of chemical pesticides is to use biological control agents like fungi, bacteria, or viruses.
Type of farming that doesn't use pesticides?
* Organic agriculture actually organic farming does use pesticides, what you're looking for is "biological control" which means it allows the use of synthetic fertilizers but trades chemical pest control with biological pest control. in biological control one applies parasitic wasps, entomophagic fungie and other such agents in much the same way one would apply chemical pesticides.
How Factors affecting rates of chemical reactions are applied in control of fire?
paasa >.<
How factors affecting rates of chemical reaction are applied in control of fire?
paasa >.<
What type of chemical compound used for killing pest?
In general, such chemical compounds are called pesticides. Different types of pests require different pesticides to control them. Permethrin is a very common pesticide used for controlling insect pests. My ex-girlfriend is a total pest and I have considered using Lead and Cordite to control her.
What is the definition of pesticides?
A pesticide is a chemical substance sprayed on crops to kill insects, pests and bacteria. The chemical agents called pesticides include herbicides (for weed control), insecticides, and fungicides. More than half the pesticides used in the United States are herbicides that control weeds. The United States Department of Agriculture (USDA) estimates indicate that 86 percent of U.S. agricultural land areas are treated with herbicides, 18 percent with insecticides, and 3 percent with fungicides. The amount of pesticide used on different crops also varies. For example, in the United States, about 67 percent of the insecticides used in agriculture are applied to two crops, cotton and corn; about 70 percent of the herbicides are applied to corn and soybeans, and most of the fungicides are applied to fruit and vegetable crops.They kill "pests".
What are four ways that chemists control the rates of chemical reactions?
Increase in Surface area,Increase in temperature,Increase in concentration,and the presence of catalysts or inhibitors.
What are four ways that chemists can control chemical reactions?
increase in surface area, increase in temperature, increase the concentration of the reactants, and the presence of catalysts or inhibitors.
What are molecules that are able to increase and control the rate at which life's chemical reactions occur?
Enzymes.
Are molecules that are able to increase and control the rate at which life's chemical reactions occur'?
Enzymes.
