Importance Of Pesticides

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What are pests? ‘a plant or animal detrimental to humans or human concerns (as agriculture or livestock production)"; alternative meanings include organisms that cause nuisance and epidemic disease associated with high mortality.’ In short they are troublesome and are the reason for unhealthy crops and dangerous food. What are pesticides? ‘A pesticide is any substance used to kill, repel, or control certain forms of plant or animal life that are considered to be pests.’ Pesticides are extremely helpful. They help by improving food production and fighting off insect-borne diseases but each coin has two sides. Their dark side is linked with birth defects, cancer and other health problems in humans, as well as declines in wildlife ranging from …show more content…
‘Light is electromagnetic radiation within a certain portion of the electromagnetic spectrum.’ The word light usually refers to visible light, which is visible to the human eye and is responsible for the sense of sight. There are two other kinds of light which isn’t visible to the human eye, but are of importance. They are infrared and ultraviolet. Visible light is the type of light that has a wavelength of 390-700 nm, and can be see by humans. Infrared rays have a wavelength of 700nm to 1mm and are mostly present as the thermal emission of objects at room temperature level. Ultraviolet rays are rays with a wavelength of 100nm to 400 nm. The UV rays are extremely dangerous to humans, before the ozone layer used to filter out the UV radiations but since the decline of the ozone layer, humans exposed to more of the radiation which can cause skin …show more content…
And now a boom in lighting technology is beginning to hint at unexpected alternatives to chemical pesticides: lasers and light-emitting diodes, or LEDs. Japanese researchers from Tohoku University have touched upon the topic of certain wavelengths of visible light being harmful to certain species of insects. For example, blue light with a wavelength of 467 nm, was lethal to the fruit fly pupae while ultraviolet A light of wavelength 378 nm was comparatively less harmful. They also went on further to find that pupae of the London Underground mosquito were killed by violet, which is of wavelength 417 nm. On the other hand pupae of the confused four beetle can be killed with several different wavelengths of light, moving on from blue to violet. If multiple insects have to be killed you will have to use multiple types of LEDs, UV light is by far the best, but it’s harmful to mammals hence not recommended. Of course it’s different than nature, as the insects were presented in front of much more light than they would have naturally. The interesting thing about this study is that it’s actually viable. This technology could be used in many environments to kill different types of bugs. The advantage of this theory is that people would be able to kill selective bugs and

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