essay on shall we use insecticides or not
Answers
Answer:
insecticides are useful for farmers .
but they also have harmful effects as they destroy naturality of crop.
Answer:As the world faces an increasing food scarcity, the biggest challenge for agricultural world is to enhance the food productivity to fulfil this increased demand. About 35% of world agricultural products is lost from pest attack due to insects, fungus, viruses, and bacteria, a adept pest control program is an important segment needed for any effort to increase the crop yields. The continuous exertion between human and his insect pest enemies started even before the start of civilization. Instead the large number of new techniques introduce by man in developing new and deadly treatments to fight the war against insects, but he has not been successful in controling even one of the thousands of serious insect pests which damages his food and other agricultural crops, destroys his property and even attack himself and injure his domestic animals.
Many of the chemical insecticides and pesticides that are currently used to control insect pests are seriously poisionoius to non-target organisms and may also be harmful for the human and animal health. These toxic chemicals also pollute water and soils, as most of the pesticides are recalcitrant to breakdown. Moreover, by using these chemicals in high quantity, most of the insect getting resistance to different pesticides.
Naturally the insect exist respite between the insect and humans, and this is known as ‘balance in nature’. There are two opposing phenomenon are responsible for this balance, one one of them is the ‘biotic potential i.e. the higher capacity of insect pests to reproduce and multiply and environment resistance by which their numbers are kept under check. The environment resistance can cause the death of adults before in the mortality of eggs, oviposition, pupae or larvae of the insects because of parasites, starvation, desiccation, diseases, predators, and other unfavorable environmental factors.
The attempts to control insect by human have changed with paasage of time from biological methods to artificial chemical control, and once again, we are intrested to control these insect naturally . But the pesticides we are using now are comparatively more safe and less toxic than those used in the past, such as DDT, which can still a cause for concern. Long-term usage of these synthetic pesticides has been releated with liver damage, immunotoxicity, cancer, reproductive problems and birth defects in humans and other animals (Kegley and Wise, 1998).